Adasuve Aerosol, Powder
FDA Label NDC 51097-001

Bronchospasm

ADASUVE can cause bronchospasm that has the potential to lead to respiratory distress and respiratory arrest, particularly in patients with lung diseases. Administer ADASUVE only in a certified healthcare setting that has immediate access on site to supplies and healthcare professionals competent in the management of acute bronchospasm and access to emergency assistance for symptoms that require immediate medical attention [see Warnings and Precautions (5.1, 5.2)] . Certified healthcare settings must have a short-acting bronchodilator (e.g. albuterol) available for the immediate treatment of bronchospasm; this short-acting bronchodilator can be delivered by inhaler (with spacer) or nebulizer. Prior to administering ADASUVE, screen patients regarding a current diagnosis, history, or symptoms of asthma, COPD and other lung diseases, and assess (including chest auscultation) patients for respiratory signs. Monitor for signs and symptoms of bronchospasm following treatment with ADASUVE [see Dosage and Administration (2.2, 2.4) and Contraindications (4)] .

Because of the risk of bronchospasm, ADASUVE is available only through a restricted program under a Risk Evaluation and Mitigation Strategy (REMS) called the ADASUVE REMS [see Warnings and Precautions (5.2)] .

Increased Mortality in Elderly Patients with Dementia-Related Psychosis

Elderly patients with dementia-related psychosis treated with antipsychotic drugs are at an increased risk of death. ADASUVE is not approved for the treatment of patients with dementia-related psychosis [see Warnings and Precautions (5.3)] .

Limitations of Use:

As part of the ADASUVE REMS Program to mitigate the risk of bronchospasm, ADASUVE must be administered only in a certified healthcare setting [see Warnings and Precautions (5.2)] .

Commonly Observed Adverse Reactions: In the 3 trials in acute agitation, the most common adverse reactions were dysgeusia, sedation, and throat irritation. These reactions occurred at a rate of at least 2% of the ADASUVE group and at a rate greater than in the placebo group. (Refer to Table 1).

Airway Adverse Reactions in the 3 Trials in Acute Agitation

Agitated patients with Schizophrenia or Bipolar Disorder: In the 3 short-term (24-hour), placebo-controlled trials in patients with agitation associated with schizophrenia or bipolar disorder (Studies 1, 2, and 3), bronchospasm (which includes reports of wheezing, shortness of breath and cough) occurred more frequently in the ADASUVE group, compared to the placebo group: 0% (0/263) in the placebo group and 0.8% (2/259) in the ADASUVE 10 mg group. One patient with schizophrenia, without a history of pulmonary disease, had significant bronchospasm requiring rescue treatment with a bronchodilator and oxygen.

Bronchospasm and Airway Adverse Reactions in Pulmonary Safety Trials

Clinical pulmonary safety trials demonstrated that ADASUVE can cause bronchospasm as measured by FEV1, and as indicated by respiratory signs and symptoms in the trials. In addition, the trials demonstrated that patients with asthma or other pulmonary diseases, such as COPD are at increased risk of bronchospasm. The effect of ADASUVE on pulmonary function was evaluated in 3 randomized, double-blind, placebo-controlled clinical pulmonary safety trials in healthy volunteers, patients with asthma, and patients with COPD. Pulmonary function was assessed by serial FEV1 tests, and respiratory signs and symptoms were assessed. In the asthma and COPD trials, patients with respiratory symptoms or FEV1 decrease of ≥ 20% were administered rescue treatment with albuterol (metered dose inhaler or nebulizer) as required. These patients were not eligible for a second dose; however, they had continued FEV1 monitoring in the trial.

Healthy Volunteers: In the healthy volunteer crossover trial, 30 subjects received 2 doses of either ADASUVE or placebo 8 hours apart, and 2 doses of the alternate treatment at least 4 days later. The results for maximum decrease in FEV1 are presented in Table 2. No subjects in this trial developed airway related adverse reactions (cough, wheezing, chest tightness, or dyspnea).

Asthma Patients: In the asthma trial, 52 patients with mild-moderate persistent asthma (with FEV1 ≥ 60% of predicted) were randomized to treatment with 2 doses of ADASUVE 10 mg or placebo. The second dose was to be administered 10 hours after the first dose. Approximately 67% of these patients had a baseline FEV1 ≥ 80% of predicted. The remaining patients had an FEV1 60-80% of predicted. Nine patients (17%) were former smokers. As shown in Table 2 and Figure 7, there was a marked decrease in FEV1 immediately following the first dose (maximum mean decreases in FEV1 and % predicted FEV1 were 303 mL and 9.1%, respectively). Furthermore, the effect on FEV1 was greater following the second dose (maximum mean decreases in FEV1 and % predicted FEV1 were 537 mL and 14.7%, respectively). Respiratory-related adverse reactions (bronchospasm, chest discomfort, cough, dyspnea, throat tightness, and wheezing) occurred in 54% of ADASUVE-treated patients and 12% of placebo-treated patients. There were no serious adverse events. Nine of 26 (35%) patients in the ADASUVE group, compared to one of 26 (4%) in the placebo group, did not receive a second dose of study medication, because they had a ≥ 20% decrease in FEV1 or they developed respiratory symptoms after the first dose. Rescue medication (albuterol via metered dose inhaler or nebulizer) was administered to 54% of patients in the ADASUVE group [7 patients (27%) after the first dose and 7 of the remaining 17 patients (41%) after the second dose] and 12% in the placebo group (1 patient after the first dose and 2 patients after the second dose).

COPD Patients: In the COPD trial, 53 patients with mild to severe COPD (with FEV1 ≥ 40% of predicted) were randomized to treatment with 2 doses of ADASUVE 10 mg or placebo. The second dose was to be administered 10 hours after the first dose. Approximately 57% of these patients had moderate COPD [Global Initiative for Chronic Obstructive Lung Disease (GOLD) Stage II]; 32% had severe disease (GOLD Stage III); and 11% had mild disease (GOLD Stage I). As illustrated in Table 2 there was a decrease in FEV1 soon after the first dose (maximum mean decreases in FEV1 and % predicted FEV1 were 96 mL and 3.5%, respectively), and the effect on FEV1 was greater following the second dose (maximum mean decreases in FEV1 and % predicted FEV1 were 125 mL and 4.5%, respectively). Respiratory adverse reactions occurred more frequently in the ADASUVE group (19%) than in the placebo group (11%). There were no serious adverse events. Seven of 25 (28%) patients in the ADASUVE group and 1 of 27 (4%) in the placebo group did not receive a second dose of study medication because of a ≥ 20% decrease in FEV1 or the development of respiratory symptoms after the first dose. Rescue medication (albuterol via MDI or nebulizer) was administered to 23% of patients in the ADASUVE group: 8% of patients after the first dose and 21% of patients after the second dose, and to 15% of patients in the placebo group.

FEV1 categories are cumulative; i.e. a subject with a maximum decrease of 21% is included in all 3 categories. Patients with a ≥ 20% decrease in FEV1 did not receive a second dose of study drug.

Figure 7: LS Mean Change from Baseline in FEV1 in Patients with Asthma

Figure 7 (Adasuve 07)

Patients with a ≥ 20% decrease in FEV1 did not receive a second dose of study drug and are not included in the curves beyond hour 10.

Extrapyramidal Symptoms (EPS): Extrapyramidal reactions have occurred during the administration of oral loxapine. In most patients, these reactions involved parkinsonian symptoms such as tremor, rigidity, and masked facies. Akathisia (motor restlessness) has also occurred.

In the 3 short-term (24-hour), placebo-controlled trials of ADASUVE in 259 patients with agitation associated with schizophrenia or bipolar disorder, extrapyramidal reactions occurred. One patient (0.4%) treated with ADASUVE developed neck dystonia and oculogyration. The incidence of akathisia was 0% and 0.4% in the placebo and ADASUVE groups, respectively.

Dystonia (Antipsychotic Class Effect): Symptoms of dystonia, prolonged abnormal contractions of muscle groups, may occur in susceptible individuals during treatment with ADASUVE. Dystonic symptoms include spasm of the neck muscles, sometimes progressing to tightness of the throat, difficulty swallowing or breathing, and/or protrusion of the tongue.

Acute dystonia tends to be dose-related, but can occur at low doses, and occurs more frequently with first generation antipsychotic drugs such as ADASUVE. The risk is greater in males and younger age groups.

Cardiovascular Reactions: Tachycardia, hypotension, hypertension, orthostatic hypotension, lightheadedness, and syncope have been reported with oral administration of loxapine.

Pregnancy Exposure Registry

There is a pregnancy exposure registry that monitors pregnancy outcomes in women exposed to atypical antipsychotics during pregnancy. Healthcare providers are encouraged to register patients by contacting the National Pregnancy Registry for Atypical Antipsychotics at 1-866-961-2388 or online at http://womensmentalhealth.org/clinical-and-research-programs/pregnancyregistry/.

Risk Summary

Neonates exposed to antipsychotic drugs, including ADASUVE, during the third trimester are at risk for extrapyramidal and/or withdrawal symptoms following delivery (see Clinical Considerations). The available data from published case reports and pharmacovigilance cases with loxapine, the active ingredient in ADASUVE, in pregnant women are insufficient to determine a drug-associated risk for major birth defects, miscarriage or adverse maternal or fetal outcomes. There are risks to the mother associated with untreated schizophrenia or bipolar I disorder, and with exposure to antipsychotics, including ADASUVE, during pregnancy (see Clinical Considerations) .

In animal reproduction studies, increased embryofetal toxicity and death in rat fetuses and offspring were observed when pregnant rats were orally administered loxapine, during the period of organogenesis, at doses approximately less than or equal to the maximum recommended human dose (MRHD) based on mg/m ² body surface area (see Data) .

The estimated background risk of major birth defects and miscarriage for the indicated population is unknown. All pregnancies have a background risk of birth defect, loss, or other adverse outcomes. In the U.S. general population, the estimated background risk of major birth defects and miscarriage in clinically recognized pregnancies is 2 to 4% and 15 to 20%, respectively.

Clinical Considerations

Fetal/Neonatal Adverse Reactions

Extrapyramidal and/or withdrawal symptoms, including agitation, hypertonia, hypotonia, tremor, somnolence, respiratory distress, and feeding disorder have been reported in neonates who were exposed to antipsychotic drugs, including ADASUVE, during the third trimester of pregnancy. These symptoms have varied in severity. Monitor neonates for extrapyramidal and/or withdrawal symptoms and manage symptoms appropriately. Some neonates recovered within hours or days without specific treatment; others required prolonged hospitalization.

Data

Animal Data

Pregnant rats were administered oral doses of 1, 4, and 12 mg/kg/day loxapine (~1, 4, and 12 times the MRHD of 10 mg/day based on mg/m ² body surface area, respectively) during the period of organogenesis. Embryofetal toxicity (increased fetal resorptions, reduced weights, and hydronephrosis with hydroureter) was observed at doses equal to the MRHD and higher based on mg/m ² body surface area.

Pregnant rabbits were administered oral doses of 20 and 60 mg/kg/day loxapine (~40 and 120 times the MRHD based on mg/m ² body surface area) during the period of organogenesis. Loxapine did not cause adverse developmental effects in rabbits at doses up to 120 times the MRHD based on mg/m ² body surface area.

Pregnant rats were administered oral doses of 0.21, 0.62, and 1.86 mg/kg/day loxapine (~0.2, 0.6, and 1.8 times the MRHD based on mg/m ² body surface area) during the period of organogenesis and through lactation. Fetal toxicity (increased prenatal death, decreased postnatal survival, reduced fetal weights, delayed ossification, and/or distended renal pelvis with reduced or absent papillae) was observed at doses of 0.6 times the MRHD and higher based on mg/m ² body surface area.

Risk Summary

There is no available information on the presence of loxapine in human milk, the effects of loxapine on the breastfed infant, or the effects of loxapine on milk production. Loxapine is present in the milk of lactating dogs. When a drug is present in animal milk, it is likely that the drug will be present in human milk. The developmental and health benefits of breastfeeding should be considered along with the mother's clinical need for ADASUVE and any potential adverse effects on the breastfed child from ADASUVE or from the underlying maternal condition.

Signs and Symptoms of Overdosage

As would be expected from the pharmacologic actions of loxapine, the clinical findings may include CNS depression, unconsciousness, profound hypotension, respiratory depression, extrapyramidal symptoms, and seizure.

Management of Overdosage

For the most up to date information on the management of ADASUVE overdosage, contact a certified poison control center (1-800-222-1222 or www.poison.org). Provide supportive care including close medical supervision and monitoring. Treatment should consist of general measures employed in the management of overdosage with any drug. Consider the possibility of multiple drug overdosage. Ensure an adequate airway, oxygenation, and ventilation. Monitor cardiac rhythm and vital signs. Use supportive and symptomatic measures.

Active Ingredient: Loxapine (base). Loxapine, a dibenzoxazepine compound, represents a subclass of tricyclic antipsychotic agents, chemically distinct from the thioxanthenes, butyrophenones, and phenothiazines. Chemically, it is 2-Chloro-11-(4-methyl-1-piperazinyl) dibenz [b,f] [1,4] oxazepine.

Chemical Structure (Adasuve 08)

ADASUVE is a single-use, drug-device combination product that provides rapid systemic delivery by inhalation of a thermally-generated aerosol of loxapine. Oral inhalation through the product initiates the controlled rapid heating of a thin film of excipient-free loxapine to form a thermally-generated drug vapor. The vapor condenses into aerosol particles that are dispersed into the airstream created by the patient inhaling through the mouthpiece.

Each product is packaged inside a sealed foil pouch. The product is a white to off-white plastic unit, with a mouthpiece on one end and a pull-tab protruding from the other end.

Removal of a pull-tab from the product renders it ready for use, as indicated by illumination of a green light. After inhalation through the mouthpiece, successful dosing is signaled by the green light turning off.

Under standardized in vitro test conditions, ADASUVE, 10 mg delivers 9.1 mg of loxapine out of the mouthpiece.

Thorough QTc Study

ADASUVE did not prolong the QTc interval. The effect of ADASUVE on QTc prolongation was evaluated in a randomized, double-blinded, positive- (moxifloxacin 400 mg) and placebo-controlled parallel study in healthy subjects. A total of 48 healthy subjects were administered ADASUVE 10 mg. In this study with a demonstrated ability to detect small effects, the upper bound of the 90% confidence interval (CI) for the largest placebo-adjusted, baseline-corrected QTc based on individual correction method was below 10 milliseconds, the threshold for regulatory concern.

Absorption: The single-dose pharmacokinetic parameters of loxapine following administration of single doses of ADASUVE 10 mg in healthy adult subjects are presented in Table 3 and Figure 8.

Administration of ADASUVE resulted in rapid absorption of loxapine, with a median time of maximum plasma concentration (T _max) of 2 minutes. Loxapine exposure in the first 2 hours after administration (AUC _0-2h) was 66.7 ng∙h/mL for the 10 mg dose. As a consequence of the very rapid absorption of loxapine after oral inhalation, there is substantial variability in the early plasma concentrations of loxapine. The mean plasma loxapine concentrations following administration of ADASUVE were linear over the clinical dose range. AUC _0-2h, AUC _inf, and C _max increased in a dose-dependent manner.

Figure 8. Mean Plasma Concentrations of Loxapine following Single-Dose Administration ADASUVE 10 mg in Healthy Subjects

Figure 8 (Adasuve 09)

Distribution: Loxapine is removed rapidly from the plasma and distributed in tissues. Animal studies following oral administration suggest an initial preferential distribution in the lungs, brain, spleen, heart, and kidney. Loxapine is 96.6% bound to human plasma proteins.

Metabolism: Loxapine is metabolized extensively in the liver following oral administration, with multiple metabolites formed. The main metabolic pathways include: 1) hydroxylation to form 8-OH-loxapine by CYP1A2 and 7-OH-loxapine by CYP3A4 and CYP2D6, 2) N-oxidation to form loxapine N-oxide by flavanoid monoamine oxidases (FMOs), and 3) de-methylation to form amoxapine. Because there are multiple metabolic pathways, the risk of metabolic interactions caused by an effect on an individual isoform is minimal. For ADASUVE, the order of metabolites observed in humans (based on systemic exposure) was 8-OH-loxapine >> loxapine N-oxide, 7-OH-loxapine > amoxapine. Plasma levels of 8-OH-loxapine are similar to those of the parent compound.

Excretion: Excretion occurs mainly in the first 24 hours. Metabolites are excreted in the urine in the form of conjugates and in the feces unconjugated. The terminal elimination half-life (T½) ranged from 6 to 8 hours.

Transporter Interaction: In vitro studies indicated that loxapine was not a substrate for p-glycoprotein (P-gp): however, loxapine inhibited P-gp.

Special Populations:

Pharmacokinetics in Smokers: Loxapine exposures in nonsmokers and smokers are similar, with geometric mean ratios of 92%, 85%, and 99% for AUC _0-2h, AUC _inf, and C _max respectively. No dosage adjustment is recommended based on smoking status.

Demographic Effects: There were no clinically significant differences in loxapine pharmacokinetics following administration of ADASUVE in subgroups based on age, weight, body mass index, gender, or race.

Carcinogenesis: No studies have been conducted.

Mutagenesis: Loxapine was not mutagenic in the in vitro bacterial reverse mutation (Ames) test, nor clastogenic in the in vitro human peripheral blood lymphocyte chromosomal aberration assay or in the in vivo mouse bone marrow micronucleus assay.

The loxapine metabolite, 8-OH-loxapine, was not mutagenic in the in vitro bacterial reverse mutation (Ames), test nor clastogenic in the in vitro human peripheral blood lymphocyte chromosomal aberration assay.

Impairment of Fertility: Loxapine was administered orally in diet to female rats from 14 days prior to mating through day 20 of gestation at doses of 0.19 and 1.28 mg/kg (~0.2 and 1 times the MRHD of 10 mg/day based on mg/m ² body surface area, respectively). In female rats, mating was decreased at both doses and no mating occurred at a dose equal to the MRHD based on mg/m ² body surface area because these animals were in persistent diestrus. Loxapine was administered orally in diet to male rats from 60 days prior to and through mating at doses of 0.197 and 1.69 mg/kg (~0.2 and 1.6 times the MRHD based on mg/m ² body surface area, respectively). In male rats, no effects on fertility were noted at any dose up to 1.6 times the MRHD based on mg/m ² body surface area. Loxapine was administered orally in diet to female rabbits for 60 days prior to and through mating at doses of 0.23 and 0.77 mg/kg (~0.4 and 1.5 times the MRHD based on mg/m ² body surface area, respectively). In female rabbits, no effects on fertility were noted at any dose up to 1.5 times the MRHD based on mg/m ² body surface area.

Bronchospasm

Advise patients and caregivers that there is a risk of bronchospasm. Advise patients to inform their healthcare professional if they develop any breathing problems such as wheezing, shortness of breath, chest tightness, or cough following treatment with ADASUVE [see Boxed Warning and Warnings and Precautions (5.1)] .

Interference with Cognitive and Motor Performance

Caution patients and caregivers about performing activities requiring mental alertness, such as operating hazardous machinery or operating a motor vehicle, until they are reasonably certain that ADASUVE has not affected them adversely [see Warnings and Precautions (5.8)] .

Caution patients and caregivers about the potential for sedation, especially when used concurrently with other CNS depressants (e.g., alcohol, opioid analgesics, benzodiazepines, tricyclic antidepressants, general anesthetics, phenothiazines, sedative/hypnotics, muscle relaxants, and/or illicit CNS depressants).

Neuroleptic Malignant Syndrome

Patients and caregivers should be counseled that a potentially fatal symptom complex sometimes referred to as NMS has been reported in association with administration of antipsychotic drugs. Signs and symptoms of NMS include hyperpyrexia, muscle rigidity, altered mental status, and evidence of autonomic instability (irregular pulse or blood pressure, tachycardia, diaphoresis, and cardiac dysrhythmia) [see Warnings and Precautions (5.4)] .

Hypotension and Syncope

Advise patients and caregivers of the risk of hypotension or orthostatic hypotension (symptoms include feeling dizzy or lightheaded upon standing) [see Warnings and Precautions (5.5)] .

Anticholinergic Reactions

Counsel patients and caregivers about the potential risks of anticholinergic reactions, such as exacerbation of glaucoma and urinary retention [see Warnings and Precautions (5.10)] .

Pregnancy

Advise pregnant women to notify their healthcare provider if they become pregnant or intend to become pregnant during treatment with ADASUVE. Advise patients that ADASUVE may cause extrapyramidal and/or withdrawal symptoms (agitation, hypertonia, hypotonia, tremor, somnolence, respiratory distress, and feeding disorder) in a neonate. Advise patients that there is a pregnancy exposure registry that monitors pregnancy outcomes in women exposed to ADASUVE during pregnancy [see Use in Specific Populations (8.1)] .

Manufactured by: Alexza Pharmaceuticals, Inc., Mountain View, CA 94043

ADASUVE is indicated for the acute treatment of agitation associated with schizophrenia or bipolar I disorder in adults [see Clinical Studies (14)] .

ADASUVE must be administered only by a healthcare professional. ADASUVE is administered by oral inhalation only. The recommended dose for acute agitation is 10 mg administered by oral inhalation, using a single-use inhaler. Administer only a single dose within a 24-hour period [see Warnings and Precautions (5.1)] .

Prior to administering ADASUVE, screen all patients for a history of asthma, COPD, or other pulmonary disease, and assess patients (including chest auscultation) for respiratory signs (e.g. wheezing) [see Warnings and Precautions (5.1)] .

Read all of these instructions prior to administering ADASUVE.

Step 1. Open the Pouch

When ready to use, tear open the foil pouch and remove the inhaler from the package (see Figure 1).

Figure 1. Tearing the pouch

Figure 1 (Adasuve 01)

When the ADASUVE inhaler is removed from the pouch, the indicator light is off (see Figure 2).

Figure 2. ADASUVE Inhaler with Indicator Light

Figure 2 (Adasuve 02)

Step 2. Pull Tab

Firmly pull the plastic tab from the rear of the inhaler (see Figure 3). Check that the green light turns on. This indicates that the inhaler is ready for use. Use the inhaler within 15 minutes after removing the tab to prevent automatic deactivation of the inhaler. The green light will turn off, indicating that the inhaler is not usable. Discard the inhaler after one use.

Figure 3.

Figure 3 (Adasuve 03)

Step 3. Explain Procedures to the Patient

Explain the administration procedures to the patient prior to use, and advise the patient that it is important to follow the instructions. Inform the patient that the inhaler may produce a flash of light and a clicking sound, and it may become warm during use. These are normal.

Step 4. Instruct the Patient to Exhale

Instruct the patient to hold the inhaler away from the mouth and breathe out fully to empty the lungs (see Figure 4).

Figure 4. Exhale

Figure 4 (Adasuve 04)

Step 5. Instruct the Patient to Inhale

Instruct the patient to put the mouthpiece of the inhaler between the lips, close the lips, and inhale through the mouthpiece with a steady deep breath (see Figure 5). Check that the green light turns off indicating that the dose has been delivered.

Figure 5. Inhale

Figure 5 (Adasuve 05)

Step 6. Instruct the Patient to Hold Breath

Instruct the patient to remove the mouthpiece from the mouth and hold the breath for as long as possible, up to 10 seconds (see Figure 6).

Figure 6. Hold Breath

Figure 6 (Adasuve 06)

Important: If the green light remains on after the patient inhales, the dose of ADASUVE has NOT been delivered. Instruct the patient to repeat Step 4, Step 5, and Step 6 up to 2 additional times. If the green light still does not turn off, discard the inhaler and use a new one.

Monitor the patient for signs and symptoms of bronchospasm after ADASUVE administration for at least one hour [see Warnings and Precautions (5.1)] .

ADASUVE is an inhalation powder supplied in a single-use, disposable inhaler containing 10 mg of loxapine base.

ADASUVE is contraindicated in patients with the following:

• Current diagnosis or history of asthma, COPD, or other lung disease associated with bronchospasm [see Warnings and Precautions (5.1)]
• Acute respiratory symptoms or signs (e.g., wheezing) [see Warnings and Precautions (5.1)]
• Current use of medications to treat airways disease, such as asthma or COPD [see Warnings and Precautions (5.1)]
• History of bronchospasm following ADASUVE treatment [see Warnings and Precautions (5.1)]
• Known hypersensitivity to loxapine or amoxapine. Serious skin reactions have occurred with oral loxapine and amoxapine.

ADASUVE can cause bronchospasm that has the potential to lead to respiratory distress and respiratory arrest [see Adverse Reactions (6.1)] . Administer ADASUVE only in a certified healthcare setting that has immediate access on site to supplies and healthcare professionals competent in the management of acute bronchospasm and access to emergency assistance for symptoms that require immediate medical attention. Certified healthcare settings must have a short-acting bronchodilator (e.g. albuterol) available for the immediate treatment of bronchospasm; this short-acting bronchodilator can be delivered by inhaler (with spacer) or nebulizer [see Boxed Warning and Warnings and Precautions (5.2)] .

Prior to administering ADASUVE, screen patients regarding a current diagnosis or history of asthma, COPD, and other lung disease associated with bronchospasm, acute respiratory symptoms or signs, current use of medications to treat airways disease, such as asthma or COPD; and assess patients (including chest auscultation) for respiratory abnormalities (e.g., wheezing) [See Dosage and Administration (2.2) and Contraindications (4)] . Monitor patients for symptoms and signs of bronchospasm for a minimum of one hour following treatment with ADASUVE [see Dosage and Administration (2.4)] . ADASUVE can cause sedation, which can mask the symptoms of bronchospasm.

Because clinical trials in patients with asthma or COPD demonstrated that the degree of bronchospasm, as indicated by changes in forced expiratory volume in 1 second (FEV1), was greater following a second dose of ADASUVE, limit ADASUVE use to a single dose within a 24-hour period.

Advise all patients of the risk of bronchospasm. Advise them to inform the healthcare professional if they develop any breathing problems such as wheezing, shortness of breath, chest tightness, or cough following treatment with ADASUVE.

Because of the risk of bronchospasm, ADASUVE is available only through a restricted program under a REMS called the ADASUVE REMS [see Boxed Warning and Warnings and Precautions (5.1)] .

Required components of the ADASUVE REMS are:

• Healthcare settings that dispense and administer ADASUVE must be certified and comply with the REMS requirements. Certified healthcare settings must be able to provide immediate access on site to supplies and healthcare professionals competent in the management of acute bronchospasm and access to emergency assistance for symptoms that require immediate medical attention. Settings must have a short-acting bronchodilator (e.g. albuterol) available for the immediate treatment of bronchospasm; this short-acting bronchodilator can be delivered by inhaler (with spacer) or nebulizer.
• Wholesalers and distributors that distribute ADASUVE must distribute only to certified healthcare settings.

Further information is available at www.adasuverems.com or 1-855-755-0492.

Elderly patients with dementia-related psychosis treated with antipsychotic drugs are at increased risk of death. Analyses of 17 placebo-controlled trials (modal duration of 10 weeks), largely in patients taking atypical antipsychotic drugs, revealed a risk of death in drug-treated patients of 1.6 to 1.7 times the risk of death in placebo-treated patients. Over the course of a typical 10-week controlled trial, the rate of death in drug-treated patients was about 4.5%, compared to a rate of about 2.6% in the placebo group. Although the cases of death were varied, most of the deaths appeared to be either cardiovascular (e.g., heart failure, sudden death) or infectious (e.g., pneumonia) in nature. Observational studies suggest that, similar to atypical antipsychotic drugs, treatment with conventional antipsychotic drugs may increase mortality. The extent to which the findings of increased mortality in observational studies can be attributed to the antipsychotic drug as opposed to some characteristic(s) of the patients is not clear. ADASUVE is not approved for the treatment of elderly patients with dementia-related psychosis [see Boxed Warning] .

Antipsychotic drugs can cause a potentially fatal symptom complex termed Neuroleptic Malignant Syndrome (NMS). Clinical manifestations of NMS include hyperpyrexia, muscle rigidity, altered mental status, and autonomic instability (irregular pulse or blood pressure, tachycardia, diaphoresis, and cardiac dysrhythmia). Associated features can include elevated serum creatine phosphokinase (CPK) concentration, rhabdomyolysis, elevated serum and urine myoglobin concentration, and renal failure. NMS did not occur in the ADASUVE clinical program.

The diagnostic evaluation of patients with this syndrome is complicated. It is important to consider the presence of other serious medical conditions (e.g., pneumonia, systemic infection, heat stroke, primary CNS pathology, central anticholinergic toxicity, extrapyramidal symptoms, or drug fever).

The management of NMS should include: 1) immediate discontinuation of antipsychotic drugs and other drugs that may contribute to the underlying disorder, 2) intensive symptomatic treatment and medical monitoring, and 3) treatment of any concomitant serious medical problems. There is no general agreement about specific pharmacological treatment regimens for NMS.

If a patient requires antipsychotic drug treatment after recovery from NMS, the potential reintroduction of drug therapy should be carefully considered. The patient should be carefully monitored, since recurrences of NMS have been reported.

ADASUVE can cause hypotension, orthostatic hypotension, and syncope. Use ADASUVE with caution in patients with known cardiovascular disease (history of myocardial infarction or ischemic heart disease, heart failure or conduction abnormalities), cerebrovascular disease, or conditions that would predispose patients to hypotension (dehydration, hypovolemia, or treatment with antihypertensive medications or other drugs that affect blood pressure or reduce heart rate).

In the presence of severe hypotension requiring vasopressor therapy, the preferred drugs may be norepinephrine or phenylephrine. Epinephrine should not be used, because beta stimulation may worsen hypotension in the setting of ADASUVE-induced partial alpha blockade.

In short-term (24-hour) placebo-controlled trials of patients with agitation associated with schizophrenia or bipolar I disorder, hypotension occurred in 0.4% and 0.8% in the ADASUVE 10 mg and placebo groups, respectively. There were no cases of orthostatic hypotension, postural symptoms, presyncope or syncope. A systolic blood pressure ≤ 90 mm Hg with a decrease of ≥ 20 mm Hg occurred in 1.5% and 0.8% of the ADASUVE 10 mg and placebo groups, respectively. A diastolic blood pressure ≤ 50 mm Hg with a decrease of ≥15 mm Hg occurred in 0.8% and 0.4% of the ADASUVE 10 mg and placebo groups, respectively.

In 5 Phase 1 studies in normal volunteers, the incidence of hypotension was 3% and 0% in ADASUVE 10 mg and the placebo groups, respectively. The incidence of syncope or presyncope in normal volunteers was 2.3% and 0% in the ADASUVE and placebo groups, respectively. In normal volunteers, a systolic blood pressure ≤ 90 mm Hg with a decrease of ≥ 20 mm Hg occurred in 5.3% and 1.1% in the ADASUVE and placebo groups, respectively. A diastolic blood pressure ≤ 50 mm Hg with a decrease of ≥ 15 mm Hg occurred in 7.5% and 3.3% in the ADASUVE and placebo groups, respectively.

ADASUVE may cause somnolence, postural hypotension, motor and sensory instability, which may lead to falls and, consequently, fractures or other injuries. For patients with diseases, conditions, or medications that could exacerbate these effects, complete fall risk assessments when initiating antipsychotic treatment and recurrently for patients on long-term antipsychotic therapy.

ADASUVE lowers the seizure threshold. Seizures have occurred in patients treated with oral loxapine. Seizures can occur in epileptic patients even during antiepileptic drug maintenance therapy. In short term (24 hour), placebo-controlled trials of ADASUVE, there were no reports of seizures.

ADASUVE can impair judgment, thinking, and motor skills. In short-term, placebo-controlled trials, sedation and/or somnolence were reported in 12% and 10% in the ADASUVE and placebo groups, respectively. No patients discontinued treatment because of sedation or somnolence.

The potential for cognitive and motor impairment is increased when ADASUVE is administered concurrently with other CNS depressants [see Drug Interactions (7.1)] . Caution patients about operating hazardous machinery, including automobiles, until they are reasonably certain that therapy with ADASUVE does not affect them adversely.

In placebo-controlled trials with atypical antipsychotics in elderly patients with dementia-related psychosis, there was a higher incidence of cerebrovascular adverse reactions (stroke and transient ischemic attacks), including fatalities, compared to placebo-treated patients. ADASUVE is not approved for the treatment of patients with dementia-related psychosis [see Boxed Warning and Warnings and Precautions (5.3)] .

ADASUVE has anticholinergic activity, and it has the potential to cause anticholinergic adverse reactions including exacerbation of glaucoma or urinary retention. The concomitant use of other anticholinergic drugs (e.g., antiparkinson drugs) with ADASUVE could have additive effects.

The following adverse reactions are discussed in more detail in other sections of the labeling:

• Hypersensitivity (serious skin reactions) [see Contraindications (4)]
• Bronchospasm [see Warnings and Precautions (5.1)]
• Increased Mortality in Elderly Patients with Dementia-Related Psychosis [see Warnings and Precautions (5.3)]
• Neuroleptic Malignant Syndrome [see Warnings and Precautions (5.4)]
• Hypotension and syncope [see Warnings and Precautions (5.5)]
• Falls [see Warnings and Precautions (5.6)]
• Seizure [see Warnings and Precautions (5.7)]
• Potential for Cognitive and Motor Impairment [see Warnings and Precautions (5.8)]
• Cerebrovascular Reactions, Including Stroke, in Elderly Patients with Dementia-Related Psychosis [see Warnings and Precautions (5.9)]
• Anticholinergic Reactions Including Exacerbation of Glaucoma and Urinary Retention [see Warnings and Precautions (5.10)]

Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be directly compared to rates in the clinical trials of another drug and may not reflect the rates observed in clinical practice.

The following findings are based on pooled data from three short-term (24-hour), randomized, double-blind, placebo-controlled clinical trials (Studies 1, 2, and 3) of ADASUVE 10 mg in the treatment of patients with acute agitation associated with schizophrenia or bipolar I disorder. In the 3 trials, 259 patients received ADASUVE 10 mg, and 263 received placebo [see Clinical Studies (14)] .

ADASUVE is a central nervous system (CNS) depressant. The concurrent use of ADASUVE with other CNS depressants (e.g., alcohol, opioid analgesics, benzodiazepines, tricyclic antidepressants, general anesthetics, phenothiazines, sedative/hypnotics, muscle relaxants, and/or illicit CNS depressants) can increase the risk of respiratory depression, hypotension, profound sedation, and syncope. Therefore, consider reducing the dose of CNS depressants if used concomitantly with ADASUVE.

ADASUVE has anticholinergic activity. The concomitant use of ADASUVE and other anticholinergic drugs can increase the risk of anticholinergic adverse reactions including exacerbation of glaucoma and urinary retention.

The safety and effectiveness of ADASUVE in pediatric patients have not been established.

Elderly patients with dementia-related psychosis treated with antipsychotic drugs are at an increased risk of death [see Boxed Warning and Warnings and Precautions (5.3)] . ADASUVE is not approved for the treatment of dementia-related psychosis. Placebo-controlled studies of ADASUVE in patients with agitation associated with schizophrenia or bipolar disorder did not include patients over 65 years of age.

ADASUVE, an atypical antipsychotic, is an inhalation powder of loxapine supplied in a single-use, disposable inhaler containing 10 mg of loxapine base. ADASUVE is a drug-device combination product.

The mechanism of action of loxapine in the treatment of agitation associated with schizophrenia and bipolar I disorder is unclear. However, its efficacy could be mediated through a combination of antagonism of central serotonin and dopamine receptors.

Loxapine acts as a monoaminergic antagonist with binding affinities (K _i values) for central serotonin 5-HT _2A, dopamine D ₁, D ₂, D ₃, and D ₄, and histamine H ₁ receptors of 2, 18, 10, 21, 9, and 15 nM, respectively. Loxapine also acts as an antagonist at muscarinic M1 and adrenergic α ₂ receptors with binding affinities of 117 and 250 nM, respectively.

In the rat, minimal and reversible squamous metaplasia of the larynx was observed after daily inhalation exposure of loxapine for 14 days at 1.7 to 13 mg/kg/day (approximately 2 to 13 times the MRHD based on a mg/m ² body surface area, respectively). This finding was considered a nonspecific particle impaction effect. Mammary hyperplasia in males and females and ovarian follicular cysts and mucification of vaginal epithelium in female rats were observed at all doses, with partial or complete recovery at the end of 14 days of treatment. In the dog, no effects on the respiratory tract or reproductive tissues were observed after inhalation exposure to loxapine for 28 days at doses up to 1.8 mg/kg/day (~6 times the MRHD based on a mg/m ² body surface area).

The efficacy of ADASUVE 10 mg in the acute treatment of agitation associated with schizophrenia or bipolar I disorder was established in two short-term (24-hour), randomized, double-blind, placebo-controlled, fixed-dose trials. Study 1 included 344 patients who met DSM-IV criteria for schizophrenia. Study 2 included 314 patients who met DSM-IV criteria for bipolar I disorder, manic or mixed episodes with or without psychotic features.

Patients were judged by the clinical investigators to be clinically agitated, with a level of agitation that met or exceeded a specific severity threshold as measured by the Positive and Negative Syndrome Scale-Excited Component (PEC). The PEC is an investigator-rated instrument consisting of 5 items: poor impulse control, tension, hostility, uncooperativeness, and excitement. Each item is scored on a scale from 1 to 7 (1 = absent, 4 = moderate, 7 = extreme). Thus, the total PEC score can range from 5 to 35. For enrollment in the studies, patients had to have a PEC score of ≥ 14, with at least one individual item score > 4.

Patients whose agitation was related to acute alcohol or drug intoxication were excluded. Patients with clinically significant acute or chronic pulmonary disease (e.g., asthma, COPD, chronic bronchitis, and emphysema) were excluded from the trials [See Contraindications (4)] .

The primary efficacy endpoint in both trials was the mean change from baseline in the PEC score, assessed 2 hours following dosing. The key secondary endpoint was the mean Clinical Global Impression Improvement (CGI-I) Scale score at two hours. The CGI-I is an investigator-rated global assessment of symptom improvement, scored on a scale of 1 to 7: 1 = very much improved; 4 = no change from baseline; 7 = very much worse.

In both studies, mean baseline PEC scores were similar in all treatment groups, averaging 17.3 to 17.7 (Table 4), with individual patient scores ranging from 14 to 31, indicating predominantly moderate levels of agitation. The mean baseline Clinical Global Impression Severity Scale (CGI-S) score in both studies was 4 (moderately ill). In Study 2, 69% of patients had a current manic episode, and 31% had a mixed/manic episode.

In Studies 1 and 2, treatment with ADASUVE was statistically significantly superior to placebo on the mean change in PEC score at 2 hours (Table 4). In both studies, the effect of ADASUVE was apparent at 10 minutes following dosing (Figures 9 and 10).

Examination of population subsets (age, race, and gender) on the primary endpoint did not reveal any differential responsiveness on the basis of these subgroupings.

Figures 9 and 10 show the decreases in PEC score at each time point assessed in the trials. In both trials, the decrease in agitation with ADASUVE was apparent at each time point tested (10, 20, 30, 45, 60, 90, and 120 minutes post-dose).

Figure 9. Mean Change from Baseline in PEC Score through 2 Hours after a Single Dose in Agitated Patients with Schizophrenia (Study 1)

Figure 9 (Adasuve 10)

Figure 10. Mean Change from Baseline in PEC Score through 2 Hours after a Single Dose in Agitated Patients with Bipolar Disorder (Study 2)

Figure 10 (Adasuve 11)

The results of the secondary endpoint, CGI-I scores, are shown in Table 5.

ADASUVE ^® (loxapine) inhalation powder is supplied as: ADASUVE 10 mg (NDC 51097-001-01) is a single-use, disposable inhaler containing 10 mg of loxapine, provided in a sealed foil pouch. ADASUVE, 10 mg is supplied in a carton of 5 units per carton (NDC 51097-001-02).

ADASUVE is only available through a restricted program called the ADASUVE REMS Program [see Warnings and Precautions (5.2)] .

Store ADASUVE at room temperature, 15° to 30°C (59° to 86°F) [see USP Controlled Room Temperature].

Keep out of reach of children.

Keep ADASUVE in pouch until time of use.

ADASUVE contains a lithium battery. Dispose of ADASUVE in accordance with all federal, state and local laws.

Advise the patient to read the FDA-approved patient labeling (Medication Guide).

Read this Medication Guide before you start taking ADASUVE and each time it is given to you. There may be new information. This Medication Guide does not take the place of talking to your healthcare provider about your medical condition or your treatment. You should share this information with your family members and caregivers.

What is the most important information I should know about ADASUVE?
ADASUVE is available only through the ADASUVE Risk Evaluation and Mitigation Strategy (REMS) Program. The healthcare setting must be certified in the ADASUVE REMS Program before you can be given ADASUVE.
ADASUVE may cause serious side effects, including:

• Narrowing of the airways (bronchospasm) that can cause you to have problems breathing or to stop breathing. People who have asthma or other airway or lung problems, such as chronic obstructive pulmonary disease (COPD), have a higher risk of bronchospasm when taking ADASUVE. Symptoms of bronchospasm may include:
  • wheezing
  • coughing
  • chest tightness
  • shortness of breath
  Tell your healthcare provider right away if you have any of these symptoms of bronchospasm after taking ADASUVE.
  Your healthcare provider should check you for breathing problems before and after you take ADASUVE.
  • Increased risk of death in elderly patients with dementia-related psychosis. Medicines like ADASUVE can raise the risk of death in elderly people who have lost touch with reality (psychosis) due to confusion and memory loss (dementia). ADASUVE is not approved for the treatment of patients with dementia-related psychosis.

  What is ADASUVE?
  ADASUVE is a prescription medicine that is inhaled through your mouth and is used to treat acute agitation in adults with schizophrenia or bipolar I disorder. It is not known if ADASUVE is safe and effective in children.

  Who should not take ADASUVE?
  Do not take ADASUVE if you:

  • have or have had asthma, chronic obstructive pulmonary disease (COPD), or other airway or lung problems that can cause bronchospasm
  • are having problems with wheezing, coughing, chest tightness, or shortness of breath
  • are taking medicines to treat asthma or COPD
  • have taken ADASUVE before and had bronchospasm
  • are allergic to loxapine or amoxapine

  What should I tell my healthcare provider before taking ADASUVE?
  Before you take ADASUVE, tell your healthcare provider if you:

  • have high or low blood pressure
  • have or have had heart problems or stroke
  • have or have had seizures (convulsions)
  • drink alcohol or use street drugs
  • have any other medical conditions
  • are pregnant or plan to become pregnant. It is not known if ADASUVE will harm your unborn baby. Talk to your healthcare provider about the risks to you and your unborn or newborn baby if you take ADASUVE during pregnancy.
    • If you become pregnant while receiving ADASUVE, talk to your healthcare provider about registering with the National Pregnancy Registry for Atypical Antipsychotics. You can register by calling 1-866-961-2388 or go to http://womensmentalhealth.org/clinical-and-research-programs/pregnancyregistry/
    • are breastfeeding or plan to breastfeed. It is not known if ADASUVE passes into your breast milk. Talk to your healthcare provider about the best way to feed your baby during treatment with ADASUVE.

    Tell your doctor about all medicines you take, including prescription and non-prescription medicines, vitamins, and herbal supplements.

    • ADASUVE and other medicines may affect each other causing side effects. ADASUVE may affect the way other medicines work, and other medicines may affect the way ADASUVE works.

    Ask your healthcare provider or pharmacist for a list of these medicines if you are not sure.
    Know the medicines you take. Keep a list of them to show to your healthcare provider and pharmacist when you get a new medicine.
    How should I take ADASUVE?

    • Your healthcare provider will show you how to take ADASUVE right before you take it.
    • Take ADASUVE exactly as your healthcare provider shows you to take it.
    • ADASUVE is for oral inhalation only.

    What should I avoid while taking ADASUVE?

    • Do not drive, operate heavy machinery, or do other dangerous activities until you know how ADASUVE affects you.
    • Do not drink alcohol while taking ADASUVE. It can increase your chances of getting serious side effects.

    What are the possible side effects of ADASUVE?
    ADASUVE can cause serious side effects, including:

    • See " What is the most important information I should know about ADASUVE?"
    • neuroleptic malignant syndrome (NMS). NMS is a rare but serious condition that may cause death. Symptoms of NMS may include:
      • high fever
      • stiff muscles
      • confusion
      • sweating
      • changes in pulse, heart rate, and blood pressure
      Tell your healthcare provider right away if you have any of these symptoms of NMS after taking ADASUVE.
      • low blood pressure (hypotension), lightheadedness, or fainting
      • seizures (convulsions)
      • severe sleepiness and difficulty with potentially dangerous activities such as driving
      • worsening of glaucoma
      • difficulty urinating

      The most common side effects of ADASUVE include:

      • bad, bitter, or metallic taste in your mouth (dysgeusia)
      • sleepiness (especially when used with other drugs that cause sleepiness)
      • sore throat

      Tell your healthcare provider if you have any side effect that bothers you or that does not go away.
      These are not all the possible side effects of ADASUVE. For more information ask your healthcare provider or pharmacist.
      Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

      General information about the safe and effective use of ADASUVE.
      Medicines are sometimes prescribed for purposes other than those listed in a Medication Guide.
      This Medication Guide summarizes the most important information about ADASUVE. If you would like more information, talk to your healthcare provider.
      You can ask your pharmacist or healthcare provider for information about ADASUVE that is written for health professionals.
      For more information, go to www.ADASUVE.com or call 1-800-284-0062.

      What are the ingredients in ADASUVE?
      Active Ingredient: loxapine
      Inactive Ingredients: none

      This Medication Guide has been approved by the U.S. Food and Drug Administration

      Manufactured by:Alexza Pharmaceuticals, Inc., Mountain View, CA 94043

      Rev. 1/2022
      ADA-50101