title: Banana juice reduces bioavailability of levodopa preparation.
abstract: This study aimed to examine the effects of banana juice on levodopa bioavailability in rats. When a levodopa preparation (EC-Doparl tablets) was orally administered with banana juice made by mixing with a fresh banana and water, there were significant decreases in C(max) (17.4+/-2.5 vs. 8.6+/-3.1 microg/ml; alpha=0.05) and AUC (1882.8+/-49.2 vs. 933.5+/-286.6 microg.min/ml; alpha=0.05) for levodopa. On the other hand, administration of the levodopa preparation with a commercial beverage containing 10% banana juice resulted in no significant change in C(max) or AUC. These results indicate that concomitant intake of levodopa preparations with banana juice, but not with a commercial banana beverage, may cause a drug-food interaction reducing levodopa bioavailability, and we should pay attention to such interactions during levodopa therapy for patients with Parkinson's disease.
authors.affiliation: Faculty of Pharmaceutical Sciences, Tokyo University of Science (RIKADAI), 2641 Yamazaki, Noda City 278-8510, Japan.
authors.forename: Yuki
authors.initials: Y
authors.lastname: Ogo
authors.forename: Nobuyoshi
authors.initials: N
authors.lastname: Sunagane
authors.forename: Takafumi
authors.initials: T
authors.lastname: Ohta
authors.forename: Tsutomu
authors.initials: T
authors.lastname: Uruno
mesh_terms: D000284:Administration, Oral; D000818:Animals; D000978:Antiparkinson Agents / Q000008:administration & dosage / Q000493:pharmacokinetics*; D001682:Biological Availability; D018565:Food-Drug Interactions; D007980:Levodopa / Q000008:administration & dosage / Q000493:pharmacokinetics*; D008297:Male; D028521:Musa; D051381:Rats; D017208:Rats, Wistar
chemical_list: D000978:Antiparkinson Agents; D007980:Levodopa