Because clinical trials are conducted under widely varying conditions and varying lengths of time, adverse reaction rates observed in the clinical trials of a drug cannot be directly compared to rates in the clinical studies of another drug and may not reflect rates observed in practice.
The most commonly observed adverse reactions in vilazodone hydrochloride-treated patients with major depressive disorder (MDD) in placebo-controlled studies (incidence ≥ 5% and at least twice the rate of placebo) were diarrhea, nausea, vomiting, and insomnia.
Patient Exposure
The safety of vilazodone hydrochloride was evaluated in 3,007 patients (18 to 70 years of age) diagnosed with MDD who participated in clinical studies, representing 676 patient-years of exposure. In an open-label 52 week study at 40 mg daily, 599 patients were exposed to vilazodone hydrochloride for a total of 348 patient-years.
The adverse reaction information presented below was derived from studies of vilazodone hydrochloride 20 mg and 40 mg daily in patients with MDD including:
• Four placebo-controlled 8 to 10-week studies in 2,233 patients, including 1,266 vilazodone hydrochloride-treated patients; and
• An open-label 52-week study of 599 vilazodone hydrochloride-treated patients.
These studies included a titration period of 10 mg daily for 7 days, followed by 20 mg daily for 7 days or to 40 mg daily over 2 weeks. In these clinical trials, vilazodone hydrochloride was administered with food.
Adverse reactions reported as reasons for discontinuation of treatment
In these studies, 7.3% of the vilazodone hydrochloride-treated patients discontinued treatment due to an adverse reaction, compared with 3.5% of placebo-treated patients. The most common adverse reaction leading to discontinuation in at least 1% of the vilazodone hydrochloride-treated patients in the placebo-controlled studies was nausea (1.4%).
Common adverse reactions in placebo-controlled MDD studies
Table 2 shows the incidence of common adverse reactions occurring in ≥ 2% of vilazodone hydrochloride-treated patients and greater than the rate of placebo-treated patients in MDD Studies. There were no dose-related adverse reactions between 20 mg and 40 mg reported.
Table 2: Common Adverse Reactions Occurring in ≥ 2% of vilazodone hydrochloride-treated Patients and Greater than the Rate of Placebo-Treated Patients
System Organ Class Preferred Term |
Placebo N=967 | Vilazodone Hydrochloride 20 mg/day N=288 | Vilazodone Hydrochloride 40 mg/day N=978 |
|---|
1 Includes abdominal discomfort, abdominal pain upper, and abdominal pain.
|
2 Includes headache and tension headache
|
3 Includes restlessness, akathisia, and restless legs syndrome
|
Sexual adverse reactions are presented in Table 3
|
| Gastrointestinal disorders | | | |
| Diarrhea | 10% | 26% | 29% |
| Nausea | 7% | 22% | 24% |
| Dry mouth | 5% | 8% | 7% |
| Vomiting | 2% | 4% | 5% |
| Abdominal pain1 | 3% | 7% | 4% |
| Dyspepsia | 2% | 2% | 3% |
| Flatulence | 1% | 3% | 3% |
| Gastroenteritis | 1% | 1% | 2% |
| Abdominal distension | 1% | 2% | 1% |
| Nervous system disorders | | | |
| Headache2 | 14% | 15% | 14% |
| Dizziness | 5% | 6% | 8% |
| Somnolence | 2% | 4% | 5% |
| Paresthesia | 1% | 1% | 2% |
| Psychiatric disorders | | | |
| Insomnia | 2% | 7% | 6% |
| Abnormal dreams | 2% | 2% | 3% |
| Restlessness3 | 1% | 2% | 3% |
| General disorders | | | |
| Fatigue | 3% | 4% | 3% |
| Cardiac disorders | | | |
| Palpitations | <1% | 1% | 2% |
| Metabolism and nutrition disorders | | | |
| Increased appetite | 1% | 1% | 3% |
| Musculoskeletal and connective tissue disorders | | | |
| Arthralgia | 1% | 2% | 1% |
| Investigations | | | |
| Increased weight | 1% | 1% | 2% |
Sexual adverse reactions
Table 3 displays the most common sexual adverse reactions in the placebo-controlled MDD studies.
Table 3: Common Sexual Adverse Reactions Occurring in ≥ 2% of vilazodone hydrochloride-treated Patients and Greater than the Rate of Placebo-Treated Patients
− Not applicable *Includes abnormal orgasm and anorgasmia
|
Preferred Term | Males | Females |
Placebo N=416 | Vilazodone Hydrochloride 20 mg/day N=122 | Vilazodone Hydrochloride 40 mg/day N=417 |
Placebo N=551 | Vilazodone Hydrochloride 20 mg/day N=166 | Vilazodone Hydrochloride 40 mg/day N=561 |
| Abnormal Orgasm* | <1% | 2% | 2% | 0% | 1% | 1% |
| Erectile dysfunction | 1% | 0% | 3% | - | - | - |
| Libido decreased | <1% | 3% | 4% | <1% | 2% | 2% |
| Ejaculation disorder | 0% | 1% | 2% | - | - | - |
Other adverse reactions observed in clinical studies
The following list does not include reactions: 1) already listed in previous tables or elsewhere in labeling, 2) for which a drug cause was remote, 3) which were so general as to be uninformative, 4) which were not considered to have significant clinical implications, or 5) which occurred at a rate equal to or less than placebo.
Reactions are categorized by body system according to the following definitions: frequent adverse reactions are those occurring in at least 1/100 patients; infrequent adverse reactions are those occurring in 1/100 to 1/1,000 patients; rare reactions are those occurring in fewer than 1/1,000 patients:
Cardiac disorders: infrequent: ventricular extrasystoles
Eye disorders: infrequent: dry eye, vision blurred, rare: cataracts
Nervous System: frequent: sedation, tremor; infrequent: migraine
Psychiatric disorders: infrequent: panic attack
Skin and subcutaneous tissue disorders: infrequent: hyperhidrosis, night sweats