NDC 52584-577 Phenylephrine Hydrochloride

Phenylephrine Hydrochloride

NDC Product Code 52584-577

NDC 52584-577-01

Package Description: 1 VIAL, SINGLE-DOSE in 1 BAG > 1 mL in 1 VIAL, SINGLE-DOSE

NDC Product Information

Phenylephrine Hydrochloride with NDC 52584-577 is a a human prescription drug product labeled by General Injectables And Vaccines, Inc.. The generic name of Phenylephrine Hydrochloride is phenylephrine hydrochloride. The product's dosage form is injection and is administered via intravenous form.

Labeler Name: General Injectables And Vaccines, Inc.

Dosage Form: Injection - A sterile preparation intended for parenteral use; five distinct classes of injections exist as defined by the USP.

Product Type: Human Prescription Drug What kind of product is this?
Indicates the type of product, such as Human Prescription Drug or Human Over the Counter Drug. This data element matches the “Document Type” field of the Structured Product Listing.

Phenylephrine Hydrochloride Active Ingredient(s)

What is the Active Ingredient(s) List?
This is the active ingredient list. Each ingredient name is the preferred term of the UNII code submitted.


Inactive Ingredient(s)

About the Inactive Ingredient(s)
The inactive ingredients are all the component of a medicinal product OTHER than the active ingredient(s). The acronym "UNII" stands for “Unique Ingredient Identifier” and is used to identify each inactive ingredient present in a product.

  • WATER (UNII: 059QF0KO0R)

Administration Route(s)

What are the Administration Route(s)?
The translation of the route code submitted by the firm, indicating route of administration.

  • Intravenous - Administration within or into a vein or veins.
  • Intravenous - Administration within or into a vein or veins.

Pharmacological Class(es)

What is a Pharmacological Class?
These are the reported pharmacological class categories corresponding to the SubstanceNames listed above.

  • alpha-1 Adrenergic Agonist - [EPC] (Established Pharmacologic Class)
  • Adrenergic alpha1-Agonists - [MoA] (Mechanism of Action)

Product Labeler Information

What is the Labeler Name?
Name of Company corresponding to the labeler code segment of the Product NDC.

Labeler Name: General Injectables And Vaccines, Inc.
Labeler Code: 52584
FDA Application Number: ANDA211079 What is the FDA Application Number?
This corresponds to the NDA, ANDA, or BLA number reported by the labeler for products which have the corresponding Marketing Category designated. If the designated Marketing Category is OTC Monograph Final or OTC Monograph Not Final, then the Application number will be the CFR citation corresponding to the appropriate Monograph (e.g. “part 341”). For unapproved drugs, this field will be null.

Marketing Category: ANDA - A product marketed under an approved Abbreviated New Drug Application. What is the Marketing Category?
Product types are broken down into several potential Marketing Categories, such as NDA/ANDA/BLA, OTC Monograph, or Unapproved Drug. One and only one Marketing Category may be chosen for a product, not all marketing categories are available to all product types. Currently, only final marketed product categories are included. The complete list of codes and translations can be found at www.fda.gov/edrls under Structured Product Labeling Resources.

Start Marketing Date: 07-23-2019 What is the Start Marketing Date?
This is the date that the labeler indicates was the start of its marketing of the drug product.

Listing Expiration Date: 12-31-2021 What is the Listing Expiration Date?
This is the date when the listing record will expire if not updated or certified by the product labeler.

Exclude Flag: N What is the NDC Exclude Flag?
This field indicates whether the product has been removed/excluded from the NDC Directory for failure to respond to FDA’s requests for correction to deficient or non-compliant submissions. Values = ‘Y’ or ‘N’.

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Phenylephrine Hydrochloride Product Label Images

Phenylephrine Hydrochloride Product Labeling Information

The product labeling information includes all published material associated to a drug. Product labeling documents include information like generic names, active ingredients, ingredient strength dosage, routes of administration, appearance, usage, warnings, inactive ingredients, etc.

Product Labeling Index

Indications And Usage

Phenylephrine hydrochloride injection, 10 mg/mL is an alpha-1 adrenergic receptor agonist indicated for the treatment of clinically important hypotension resulting primarily from vasodilation in the setting of anesthesia.

Dosage And Administration

  • 2.1 General Dosage and Administration InstructionsPhenylephrine hydrochloride injection, 10 mg/mL must be diluted before administration as an intravenous bolus or continuous intravenous infusion to achieve the desired concentration:Bolus: Dilute with normal saline or 5% dextrose in water.Continuous infusion: Dilute with normal saline or 5% dextrose in water.Parenteral drug products should be inspected visually for particulate matter and discoloration prior to administration. Do not use if the solution is colored or cloudy, or if it contains particulate matter. The diluted solution should not be held for more than 4 hours at room temperature or for more than 24 hours under refrigerated conditions. Discard any unused portion.During phenylephrine hydrochloride injection administration:Correct intravascular volume depletion.Correct acidosis. Acidosis may reduce the effectiveness of phenylephrine.2.2 Dosing for Treatment of Hypotension during AnesthesiaThe following are the recommended dosages for the treatment of hypotension during anesthesia.The recommended initial dose is 40 to 100 mcg administered by intravenous bolus.May administer additional boluses every 1 to 2 minutes as needed; not to exceed a total dosage of 200 mcg.If blood pressure is below the target goal, start a continuous intravenous infusion with an infusion rate of 10 to 35 mcg/minute; not to exceed 200 mcg/minute.Adjust dosage according to the blood pressure goal.2.3 Prepare a 100 mcg/mL Solution for Bolus Intravenous AdministrationFor bolus intravenous administration, prepare a solution containing a final concentration of 100 mcg/mL of phenylephrine hydrochloride injection:Withdraw 10 mg (1 mL of 10 mg/mL) of phenylephrine hydrochloride and dilute with 99 mL of 5% Dextrose Injection, USP or 0.9% Sodium Chloride Injection, USP.Withdraw an appropriate dose from the 100 mcg/mL solution prior to bolus intravenous administration.2.4 Prepare a Solution for Continuous Intravenous AdministrationFor continuous intravenous infusion, prepare a solution containing a final concentration of 20 mcg/mL of phenylephrine hydrochloride in 5% Dextrose Injection, USP or 0.9% Sodium Chloride Injection, USP:Withdraw 10 mg (1 mL of 10 mg/mL) of phenylephrine hydrochloride and dilute with 500 mL of 5% Dextrose Injection, USP or 0.9% Sodium Chloride Injection, USP.

Dosage Forms And Strengths

Phenylephrine hydrochloride injection, USP is a sterile, clear, colorless solution and supplied in 1 mL single-dose glass vials. Each mL contains phenylephrine hydrochloride USP, 10 mg.



Warnings And Precautions

5.1 Exacerbation of Angina, Heart Failure, or Pulmonary Arterial HypertensionBecause of its increasing blood pressure effects, phenylephrine hydrochloride can precipitate angina in patients with severe arteriosclerosis or history of angina, exacerbate underlying heart failure, and increase pulmonary arterial pressure.5.2 Peripheral and Visceral IschemiaPhenylephrine hydrochloride can cause excessive peripheral and visceral vasoconstriction and ischemia to vital organs, particularly in patients with extensive peripheral vascular disease.5.3 Skin and Subcutaneous NecrosisExtravasation of phenylephrine hydrochloride can cause necrosis or sloughing of tissue. The infusion site should be checked for free flow. Care should be taken to avoid extravasation of phenylephrine hydrochloride.5.4 BradycardiaPhenylephrine hydrochloride can cause severe bradycardia and decreased cardiac output.5.5 Allergic ReactionsPhenylephrine hydrochloride contains sodium metabisulfite, a sulfite that may cause allergic-type reactions, including anaphylactic symptoms and life-threatening or less severe asthmatic episodes in certain susceptible people. The overall prevalence of sulfite sensitivity in the general population is unknown and probably low. Sulfite sensitivity is seen more frequently in asthmatic than in nonasthmatic people.5.6 Renal ToxicityPhenylephrine hydrochloride can increase the need for renal replacement therapy in patients with septic shock. Monitor renal function.5.7 Risk of Augmented Pressor Affect in Patients with Autonomic DysfunctionThe increasing blood pressure response to adrenergic drugs, including phenylephrine hydrochloride, can be increased in patients with autonomic dysfunction, as may occur with spinal cord injuries.5.8 Pressor Effect with Concomitant Oxytocic DrugsOxytocic drugs potentiate the increasing blood pressure effect of sympathomimetic pressor amines including phenylephrine hydrochloride [see DRUG INTERACTIONS (7.1)], with the potential for hemorrhagic stroke.

Adverse Reactions

Adverse reactions to phenylephrine hydrochloride are primarily attributable to excessive pharmacologic activity. Adverse reactions reported in published clinical studies, observational trials, and case reports of phenylephrine hydrochloride are listed below by body system. Because these reactions are reported voluntarily from a population of uncertain size, it is not always possible to estimate their frequency reliably or to establish a causal relationship to drug exposure.Cardiac disorders: Reflex bradycardia, lowered cardiac output, ischemia, hypertension, arrhythmiasGastrointestinal disorders: Epigastric pain, vomiting, nauseaNervous system disorders: Headache, blurred vision, neck pain, tremorsVascular disorders: Hypertensive crisisRespiratory, Thoracic and Mediastinal Disorders: DyspneaSkin and subcutaneous tissue disorders: Pruritis

Drug Interactions

  • 7.1 Interactions that Augment Pressor EffectThe increasing blood pressure effect of phenylephrine hydrochloride is increased in patients receiving:Monoamine oxidase inhibitors (MAOI)Oxytocin and oxytocic drugsTricyclic antidepressantsAngiotensin, aldosteroneAtropineSteroids, such as hydrocortisoneNorepinephrine transporter inhibitors, such as atomoxetineErgot alkaloids, such as methylergonovine maleate7.2 Interactions that Antagonize the Pressor EffectThe increasing blood pressure effect of phenylephrine hydrochloride is decreased in patients receiving:α-adrenergic antagonistsPhosphodiesterase Type 5 inhibitorsMixed α- and β-receptor antagonistsCalcium channel blockers, such as nifedipineBenzodiazepinesACE inhibitorsCentrally acting sympatholytic agents, such as reserpine, guanfacine.

Use In Specific Populations

8.1 PregnancyPregnancy Category CRisk SummaryThere are no adequate or well-controlled studies with phenylephrine hydrochloride injection in pregnant women, nor have animal reproduction studies been conducted. Published studies in normotensive pregnant rabbits report early onset labor, increased fetal lethality, and adverse placental effects with subcutaneous phenylephrine administration during gestation at doses approximately 1.9-times the total daily human dose. Published studies in normotensive pregnant sheep report decreased uterine blood flow and decreased PaO2 in the fetus with intravenous phenylephrine administration during late gestation at doses less than and similar to the human dose. It is not known whether phenylephrine hydrochloride, can cause fetal harm when administered to a pregnant woman. Phenylephrine hydrochloride, should be given to a pregnant woman only if the potential benefit justifies the potential risk to the fetus.Clinical ConsiderationsLabor and DeliveryThe most common maternal adverse reactions reported in published studies of phenylephrine use during neuraxial anesthesia during Cesarean delivery include nausea and vomiting, bradycardia, reactive hypertension, and transient arrhythmias. Phenylephrine, when administered during labor or delivery, does not appear to alter either neonatal Apgar scores or umbilical artery blood-gas status.DataAnimal DataStudies in the published literature evaluating subcutaneously administered phenylephrine (0.33 mg/kg, TID) in normotensive pregnant rabbits reported fetal deaths, adverse histopathology findings in the placenta (necrosis, calcification and thickened vascular walls with narrowed lumen) and possible teratogenic effects (one incidence of clubbed feet, partial development of the intestine) when treatment was initiated during the first trimester or later; and premature labor when treatment was initiated at the second trimester or later. The doses administered were 1.9- times the total daily human dose of 10 mg/day based on a body surface area comparison. Published studies in pregnant normotensive sheep demonstrate that intravenous phenylephrine (4 mcg/kg/min for 30 minutes, equivalent to 3.6 to 4.1 mcg/kg/min human equivalent dose based on body surface area) administered during the third trimester of pregnancy decreased uterine blood flow by 42%. This dose is 1.1- to 1.2-times the human bolus dose of 200 mcg/60 kg person based on body surface area. Mean fetal blood pressure and heart rate fluctuated above and below controls by about 7% during the infusion. Fetal PaO2 was significantly decreased by approximately 26% of control during the infusion. Likewise, PaCO2 was increased and pH was decreased. The clinical significance of these findings is not clear; however, the results suggest the potential for cardiovascular effects on the fetus when phenylephrine is used during pregnancy.8.3 Nursing MothersIt is not known whether phenylephrine is present in human milk. The developmental and health benefits of breastfeeding should be considered along with the mother’s clinical need for phenylephrine hydrochloride and any potential adverse effects on the breastfed child from the drug or from the underlying maternal condition. Exercise caution when phenylephrine hydrochloride injection is administered to a nursing woman.8.4 Pediatric UseSafety and effectiveness in pediatric patients have not been established.8.5 Geriatric UseClinical studies of phenylephrine did not include sufficient numbers of subjects aged 65 and over to determine whether they respond differently from younger subjects. Other reported clinical experience has not identified differences in responses between the elderly and younger patients. In general, dose selection for an elderly patient should be cautious, usually starting at the low end of the dosing range, reflecting the greater frequency of decreased hepatic, renal, or cardiac function, and of concomitant disease or other drug therapy.8.6 Hepatic ImpairmentIn patients with liver cirrhosis [Child Pugh Class B and Class C], dose-response data indicate decreased responsiveness to phenylephrine. Start dosing in the recommended dose range but consider that you may need to give more phenylephrine in this population.8.7 Renal ImpairmentIn patients with end stage renal disease (ESRD), dose-response data indicate increased responsiveness to phenylephrine. Consider starting at the lower end of the recommended dose range, and adjusting dose based on the target blood pressure goal.


Overdose of phenylephrine hydrochloride can cause a rapid rise in blood pressure. Symptoms of overdose include headache, vomiting, hypertension, reflex bradycardia, a sensation of fullness in the head, tingling of the extremities, and cardiac arrhythmias including ventricular extrasystoles and ventricular tachycardia.


Phenylephrine is an alpha-1 adrenergic receptor agonist. Phenylephrine hydrochloride injection USP, 10 mg/mL is a sterile, nonpyrogenic solution for intravenous use. It must be diluted before administration as an intravenous bolus or continuous intravenous infusion. The chemical name of phenylephrine hydrochloride is (-)-m-hydroxy-α-[(methylamino)methyl]benzyl alcohol hydrochloride, and its structural formula is depicted below:Phenylephrine hydrochloride, USP is a white or practically white crystals with a molecular formula of C9H13NO2 • HCl and a molecular weight of 203.67. It is freely soluble in water and in alcohol.Phenylephrine hydrochloride injection USP, 10 mg/mL is sensitive to light.Each mL contains: phenylephrine hydrochloride, USP 10 mg, sodium chloride 3.5 mg, trisodium citrate dihydrate 4 mg, citric acid monohydrate 1 mg, and sodium metabisulfite 2 mg in water for injection. The pH is adjusted with sodium hydroxide and/or hydrochloric acid if necessary. The pH range is 3.5 to 5.5.

Clinical Pharmacology

12.1 Mechanism of ActionPhenylephrine hydrochloride is an α-1 adrenergic receptor agonist.12.2 PharmacodynamicsInteraction of phenylephrine with α1-adrenergic receptors on vascular smooth muscle cells causes activation of the cells and results in vasoconstriction. Following phenylephrine hydrochloride intravenous administration, increases in systolic and diastolic blood pressures, mean arterial blood pressure, and total peripheral vascular resistance are observed. The onset of blood pressure increase following an intravenous bolus phenylephrine hydrochloride administration is rapid, typically within minutes. As blood pressure increases following intravenous administration, vagal activity also increases, resulting in reflex bradycardia. Phenylephrine has activity on most vascular beds, including renal, pulmonary, and splanchnic arteries.12.3 PharmacokineticsFollowing an intravenous infusion of phenylephrine hydrochloride, the observed effective half-life was approximately 5 minutes. The steady-state volume of distribution of approximately 340 L suggests a high distribution into organs and peripheral tissues. The average total serum clearance is approximately 2100 mL/min. The observed phenylephrine plasma terminal elimination half-life was 2.5 hours.Phenylephrine is metabolized primarily by monoamine oxidase and sulfotransferase. After intravenous administration of radiolabeled phenylephrine, approximately 80% of the total dose was eliminated within first 12 hours; and approximately 86% of the total dose was recovered in the urine within 48 hours. The excreted unchanged parent drug was 16% of the total dose in the urine at 48 hours post intravenous administration. There are two major metabolites, with approximately 57 and 8% of the total dose excreted as m-hydroxymandelic acid and sulfate conjugates, respectively. The metabolites are considered not pharmacologically active.

Nonclinical Toxicology

13.1 Carcinogenesis, Mutagenesis, Impairment of FertilityCarcinogenesis: Long-term animal studies that evaluated the carcinogenic potential of orally administered phenylephrine hydrochloride in F344/N rats and B6C3F1 mice were completed by the National Toxicology Program using the dietary route of administration. There was no evidence of carcinogenicity in mice administered approximately 270 mg/kg/day (131-times the maximum recommended daily dose of < 10 mg/day) or rats administered approximately 50 mg/kg/day (48-times the maximum recommended daily dose of < 10 mg/day) based on body surface area comparisons.Mutagenesis: Phenylephrine hydrochloride tested negative in the in vitro bacterial reverse mutation assay (S.typhimurium strains TA98, TA100, TA1535 and TA1537), the in vitro chromosomal aberrations assay, the in vitro sister chromatid exchange assay, and the in vivo rat micronucleus assay. Positive results were reported in only one of two replicates of the in vitro mouse lymphoma assay.Impairment of Fertility: Studies to evaluate the effect of phenylephrine on fertility have not been conducted.

Clinical Studies

The evidence for the efficacy of phenylephrine hydrochloride is derived from studies of phenylephrine hydrochloride in the published literature. The literature support includes 16 studies evaluating the use of intravenous phenylephrine to treat hypotension during anesthesia. The 16 studies include 9 studies where phenylephrine was used in low-risk (ASA 1 and 2) pregnant women undergoing neuraxial anesthesia during Cesarean delivery, 6 studies in non-obstetric surgery under general anesthesia, and 1 study in non-obstetric surgery under combined general and neuraxial anesthesia. Phenylephrine has been shown to raise systolic and mean blood pressure when administered either as a bolus dose or by continuous infusion following the development of hypotension during anesthesia.

Patient Counseling Information

If applicable, inform patients, family member, or caregiver that certain medical conditions and medications might influence how phenylephrine hydrochloride injection works.Manufactured by:Amneal Pharmaceuticals Pvt. Ltd.Parenteral UnitAhmedabad 382213, INDIADistributed by:Amneal Biosciences LLCBridgewater, NJ 08807Rev. 04-2018-00

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