The object of this study was to compare the relative bioavailability (rate and extent of absorption) of Pramipexole Dihydrochloride Tablets 0.25 mg by Barr Laboratories, Inc. with that of Mirapex® Tablets 0.25 mg distributed by Boehringer Ingelheim Pharmaceuticals, Inc. following a single oral dose in healthy adults under fasting conditions.

Criteria for Evaluation: FDA Bioequivalence Criteria

Statistical Methods: FDA Bioequivalence Statistical Methods

Inclusion Criteria:

• All volunteers selected for this study will be healthy men and women 18 to 45 years of age, inclusive.
• The weight range will not exceed + 20% for height and body frame as per Desirable Weight for Adults - 1983 Metropolitan Height and Weight Table.
• Each volunteer will complete the screening process within 28 days prior to Period I dosing.
• Consent documents for both the screening evaluation and HIV antibody determination will be reviewed, discussed, and signed by each potential participant before full implementation of screening procedures.
• If female: and of child bearing potential, is practicing an acceptable method of birth control for the duration of the study as judged by the investigator(s); is postmenopausal for at least 1 year; or is surgically sterile.

Exclusion Criteria:

• Volunteers with a recent history of drug or alcohol addiction or abuse.
• Volunteers with the presence of a clinically significant disorder involving the cardiovascular, respiratory, renal, gastrointestinal, immunologic, hematologic, endocrine, or neurologic system(s) or psychiatric disease (as determined by the clinical investigator).
• Volunteers whose clinical laboratory test values are outside the accepted reference range and when confirmed on re-examination are deemed to be clinically significant.
• Volunteers demonstrating a reactive screen for hepatitis B surface antigen, hepatitis C antibody or HIV antibody.
• Volunteers demonstrating a positive drug abuse screen when screened for this study.
• Female volunteers demonstrating a positive pregnancy screen.
• Female volunteers who are currently breastfeeding.
• Volunteers with a history of allergic response(s) to pramipexole or related drugs.
• Volunteers with a history of clinically significant allergies including drug allergies.
• Volunteers with a clinically significant illness during the 4 weeks prior to Period I dosing (as determined by the clinical investigator).
• Volunteers who currently use tobacco products
• Volunteers who have taken any drug known to induce or inhibit hepatic drug metabolism in the 28 days prior to Period I dosing.
• Volunteers who report donating greater than 150mL of blood within 28 days prior to Period I dosing. All subjects will be advised not to donate blood for 4 weeks after completing the study.
• Volunteers who have donated plasma (e.g. plasmapheresis) within 14 days prior to Period I dosing. All subjects will be advised not to donate plasma for 4 weeks after completing the study.
• Volunteers who report receiving any investigational drug within 28 days prior to Period 1 dosing.
• Volunteers who report taking any systemic prescription medications in the 14 days prior to Period I dosing. Diltiazem (Cardizem®), triamterene (Dyrenium®), verapamil (Calan®, Covera-HS®), quinidine, and quinine are prohibited throughout the entire study.
• Volunteers using OTC medication 7 days prior to dosing including vitamins, cough and cold preparations. Cimetidine (Tagamet®), ranitidine (Zantac®), probenecid (Pro-Bionate®), any OTC antihistamine products (such as diphenhydramine, chlorpheniramine) are absolutely prohibited throughout the entire study.
• Volunteers who consume food containing poppy seeds in the 48 hours before dosing of each period.
• Volunteers who consume grapefruit or related products 14 days prior to Period I dosing.
• Female volunteers who report the use of oral contraceptives or injectable contraceptives.

Adverse event data was collected over the course of the study, which was approximately 2 weeks in duration.

Volunteers were monitored throughout the study for any adverse experiences. AEs were collected through both solicited and unsolicited methods. The volunteers were encouraged to report signs, symptoms, and any changes in health to the clinic staff.