Effect of Co-administration of Metformin and Daclatasvir on the Pharmacokinetis and Pharmacodynamics of Metformin

Study Design:

A randomized, one-way, single blinded, two-period, crossover study in adult human healthy egyptian volunteers

Methodology:

period (I): Group A:10 volunteers will receive 500 mg Metformin twice daily on day 1-4 then 1000mg metformin twice on day 5-7

GroupB:10 volunteers will receive 500 mg Metformin twice daily + Daclatasvir (DCV) 60 mg once daily on day 1-4 then 1000mg metformin twice daily+DCV 60 mg once daily on day 5-7

period (II): Group A:10 volunteers will receive 500 mg Metformin twice daily + Daclatasvir (DCV) 60 mg once daily on day 1-4 then 1000mg metformin twice daily+DCV 60 mg once daily on day 5-7

Group B:10 volunteers will receive 500 mg Metformin twice daily on day 1-4 then 1000mg metformin twice daily on day 5-7

All drug administration will be followed by 240 ml of water after at least 10 hours fasting prior to administration.

The two treatment periods will be separated by a one week washout period

Blood Sampling will be collected at a pre-dosing and at 0.25, 0.33, 0.5, 0.75, 1, 1.5, 2, 2.5, 3, 3.5, 4, 6, 8, 10, 12 hours Urine samples will be collected for metformin analysis from 0 to 12 hours after drug administration.

A 75 g Oral glucose tolerance test(OGTT) will be carried out by ingestion of 75g glucose in 240ml water 2-hours post dosing and blood samples for determining glucose concentration during OGTTs were collected immediately before and 0.25, 0.5, 0.75, 1, 1.5, 2, 2.5, and 3 hours after glucose ingestion.

Blood samples will be collected from each volunteer prior to drug administration (blank) at the predetermined sampling intervals after drug administration in ethylene diamine tetra-acetic acid(kEDTA) containing tubes.

These samples will be centrifuged and the plasma harvested and stored at -80°C until assay.

Inclusion criteria

• Subject is at least 18-55 years at screening.
• Subject has a Body Mass Index of 18 to 35 kg/m2.
• Subject are non smokers or moderate smokers(not more than 10 cigarettes per day)
• Subjects is willing to participate and give their final written consent prior to the commencement of the study procedures
• Subject is in good age-appropriate health condition as established by medical history, physical examination, and results of biochemistry, hematology and urine analysis testing within 4 weeks prior to study.
• Subject has a normal blood pressure and pulse rate, according to the reference normal ranges.

Exclusion criteria

• Treatment with any known enzyme-inducing/inhibiting agents prior to the start of the study and throughout the study.
• Subjects who have taken any medication two weeks preceding of the trial starting date.
• Documented history of sensitivity/idiosyncrasy to medicinal products or excipients.
• Any prior surgery of the gastrointestinal tract that may interfere with drug absorption.
• Gastrointestinal diseases.
• Renal diseases.
• Cardiovascular diseases specially transient ischemic attacks and cardiac dysrhythmia .
• Pancreatic disease including diabetes.
• Hepatic diseases as hepatic failure, cirrhosis, galactose intolerance, fructose intolerance, glycogen storage diseases
• Hematological disease or pulmonary disease
• Abnormal laboratory values.
• Subjects who have donated blood or who have been involved in a drug study within 6 weeks preceding the start of the study.
• Positive HIV test.
• History of or current abuse of drugs, alcohol or solvents.
• Endocrine disorders as Pheochromocytoma, Addison disease, glucagon deficiency, carcinomas, extrahepatic tumors
• Autoimmune disorders as Graves disease
• Central nervous system (CNS) disorders