title: Similar rivastigmine pharmacokinetics and pharmacodynamics in Japanese and white healthy participants following the application of novel rivastigmine patch.
abstract: The pharmacokinetics and pharmacodynamics of rivastigmine were compared in Japanese and white healthy participants who were given ascending single doses of the novel rivastigmine transdermal patch. Rivastigmine patch strengths were 4.6 mg/24 h (5 cm2, 9 mg rivastigmine loaded dose), 9.5 mg/24 h (10 cm2, 18 mg), and 13.3 mg/24 h (15 cm2, 27 mg) (per label) or 7.0 mg/24 h (7.5 cm2, 13.5 mg) as a fall-back dose. No relevant ethnic differences in the noncompartmental pharmacokinetics (parent and metabolite NAP226-90) and pharmacodynamics (plasma BuChE activity) of the rivastigmine patch were observed between Japanese and whites. However, drug exposure was slightly higher and inhibition of BuChE slightly more pronounced in Japanese participants than in whites, which was attributed to the lower body weight (ca. 11% less on average) of Japanese participants. Treatments were similarly well tolerated in both ethnic groups. In conclusion, no relevant ethnic differences in the intrinsic disposition or effects of rivastigmine delivered via transdermal route are expected between Japanese and white patients. The possible effect of body weight on drug exposure suggests that special attention should be paid to patients with very low body weight during up-titration.
authors.affiliation: Novartis Pharma AG, Exploratory Development, WSJ-210.4.25, CH-4002 Basel, Switzerland. gilbert.lefevre@novartis.com
authors.forename: Gilbert
authors.initials: G
authors.lastname: Lefèvre
authors.forename: Monika
authors.initials: M
authors.lastname: Büche
authors.forename: Greg
authors.initials: G
authors.lastname: Sedek
authors.forename: Steve
authors.initials: S
authors.lastname: Maton
authors.forename: Albert
authors.initials: A
authors.lastname: Enz
authors.forename: Ulrike
authors.initials: U
authors.lastname: Lorch
authors.forename: Cyriaque
authors.initials: C
authors.lastname: Sagan
authors.forename: Silke
authors.initials: S
authors.lastname: Appel-Dingemanse
mesh_terms: D000279:Administration, Cutaneous; D000328:Adult; D044466:Asian People; D002091:Butyrylcholinesterase / Q000097:blood; D002800:Cholinesterase Inhibitors / Q000008:administration & dosage* / Q000009:adverse effects / Q000493:pharmacokinetics*; D016503:Drug Delivery Systems; D006801:Humans; D008297:Male; D048448:Phenylcarbamates / Q000008:administration & dosage* / Q000009:adverse effects / Q000493:pharmacokinetics*; D000068836:Rivastigmine; D044465:White People
chemical_list: D002800:Cholinesterase Inhibitors; D048448:Phenylcarbamates; D002091:Butyrylcholinesterase; D000068836:Rivastigmine