Effect of an acidic beverage (Coca-Cola) on the pharmacokinetics of carbamazepine in healthy volunteers.

Author(s): Malhotra S, Dixit RK, Garg SK

Affiliation(s): Department of Pharmacology, Postgraduate Institute of Medical Education and Research, Chandigarh, India. medinst@pgi.chd.nic.in

Publication date & source: 2002-01, Methods Find Exp Clin Pharmacol., 24(1):31-3.

Publication type: Clinical Trial; Randomized Controlled Trial

The effect of an acidic beverage (Coca-Cola) on the pharmacokinetics of a single dose of carbamazepine was studied. In a two-way cross-over design with a 1 week washout period, 10 healthy volunteers were randomized to received 200 mg carbamazepine orally with 300 ml of Coca-Cola or water. Blood samples were collected at 0, 0.5, 1, 2, 3, 6, 9, 12, 24, 48 and 72 h after drug administration. Plasma carbamazepine levels were higher with Coca-Cola as compared to water. The AUC0-infinity and Cmax of carbamazepine were significantly enhanced after Coca-Cola while tmax was achieved earlier with Coca-Cola. The results of the study indicate that concomitant administration of Coca-Cola enhances the rate and extent of absorption of carbamazepine.