effect of co-administration of metformin and daclatasvir on the pharmacokinetis and pharmacodynamics of metformin

Conditions: Diabetes Mellitus, Type 2; Hepatitis C; Drug Interactions

Summary: a randomized,two-period, crossover study to determine the possibility of drug-drug interaction after co-administration of metformin and daclatasvir where twenty eligible adult subjects will be randomized to receive either metformin only and/or metformin co-administered with daclatasvir to measure primary outcomes including pharmacokinetics parameters as: maximum drug concentration in plasma(cmax), area under the plasma concentration versus time curve from time 0 to 12 hours(auc0-12), clearance(cl)

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.

Eligibility criteria:
inclusion criteria: 1. subject is at least 18-55 years at screening. 2. subject has a body mass index of 18 to 35 kg/m2. 3. subject are non smokers or moderate smokers(not more than 10 cigarettes per day) 4. subjects is willing to participate and give their final written consent prior to the commencement of the study procedures 5. 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. 6. subject has a normal blood pressure and pulse rate, according to the reference normal ranges. exclusion criteria: 1. treatment with any known enzyme-inducing/inhibiting agents prior to the start of the study and throughout the study. 2. subjects who have taken any medication two weeks preceding of the trial starting date. 3. documented history of sensitivity/idiosyncrasy to medicinal products or excipients. 4. any prior surgery of the gastrointestinal tract that may interfere with drug absorption. 5. gastrointestinal diseases. 6. renal diseases. 7. cardiovascular diseases specially transient ischemic attacks and cardiac dysrhythmia . 8. pancreatic disease including diabetes. 9. hepatic diseases as hepatic failure, cirrhosis, galactose intolerance, fructose intolerance, glycogen storage diseases 10. hematological disease or pulmonary disease 11. abnormal laboratory values. 12. subjects who have donated blood or who have been involved in a drug study within 6 weeks preceding the start of the study. 13. positive hiv test. 14. history of or current abuse of drugs, alcohol or solvents. 15. endocrine disorders as pheochromocytoma, addison disease, glucagon deficiency, carcinomas, extrahepatic tumors 16. autoimmune disorders as graves disease 17. central nervous system (cns) disorders