Objective:

The Bioequivalence studies were performed to compare the rate and extent of release of the drug substance from the two Capsule formulations containing Venlafaxine Hydrochloride Extended-Release Capsules 150mg of Torrent Pharmaceuticals Limited and the Effexor XR® (Venlafaxine Hydrochloride) Extended-Release Capsules 150mg of Wyeth Pharmaceuticals Inc., USA.

Study Design:

Open Label, Randomised, Two Period, Two Treatment, Two Sequence, Crossover, Single-Dose Bioequivalence Study of Venlafaxine Hydrochloride Extended-Release Capsules 150mg (Test formulation, Torrent Pharmaceutical Limited., India) Versus Effexor XR® 150mg capsule (Reference formulation, Wyeth Pharmaceuticals Inc., USA) in Healthy Volunteers

Inclusion Criteria:

The volunteers were excluded from the study based on the following criteria:

• Sex: male.
• Age: 18 - 45 years. .
• Volunteer with BMI of 18-27 (inclusive both) kg/m2 with minimum of 50 kg weight.
• Healthy and willing to participate in the study.
• Volunteer willing to adhere to the protocol requirements and to provide written informed consent.
• Non-smokers or smoker who smokes less than 10 cigarettes per day

Exclusion Criteria:

The volunteers were excluded from the study based on the following criteria:

• Clinically relevant abnormalities in the results of the laboratory screening evaluation.
• Clinically significant abnormal ECG or Chest X-ray.
• Systolic blood pressure less than 100 mm Hg or more than 140 mm Hg and diastolic blood pressure less than 60 mm Hg or more than 90 mm Hg.
• Pulse rate less than 50/minute or more than 100/minute.
• Oral temperature less than 95°P or more than 98.6°P.
• Respiratory rate less than 12/minute or more than 20/minute
• History of allergy to the test drug or any drug chemically similar to the drug under investigation.
• History of alcohol or drug abuse
• Positive breath alcohol test
• Recent history of kidney or liver dysfunction.
• History of consumption of prescribed medication since last 14 days or OTC medication since last 07 days before beginning of the study.
• Volunteers suffering from any chronic illness such as arthritis, asthma etc.
• History of heart failure.
• HIV, HCV, HBsAg positive volunteers.
• Opiate, tetra hydrocannabinol, amphetamine, barbiturates, benzodiazepines, - -Cocaine positive volunteers based on urine test.
• Volunteers suffering from any psychiatric (acute or chronic) illness requiring medications.
• Administration of any study drug in the period 0 to 3 months before entry to the study.
• History of significant blood loss due to any reason, including blood donation in the past 3 months.
• History of pre-existing bleeding disorder.
• Existence of any surgical or medical condition, which, in the judgment of the chief investigator and/or clinical investigator/physician, might interfere with the absorption, distribution, metabolism or excretion of the drug or likely to compromise the safety of volunteers.
• Inability to communicate or co-operate due to language problem, poor mental development or impaired cerebral function.