Effect of clarithromycin on the pharmacokinetics of pranlukast in healthy volunteers.
Pranlukast is a cysteinyl leukotriene receptor antagonist that has been used to treat bronchial asthma and allergic rhinitis. In vitro data suggest that pranlukast is a substrate of CYP3A4. Thus, the effect of clarithromycin, a potent CYP3A4 inhibitor, on the pharmacokinetics of pranlukast was examined in an open-label, randomized, two-way crossover study in 16 healthy male volunteers. In treatment A, volunteers received a single, 225 mg dose of pranlukast. In treatment B, 200 mg of clarithromycin was administered twice daily for 7 days and a single, 225 mg dose of pranlukast was coadministered on day 7. Blood samples were collected up to 24 hours after treatment, and pranlukast concentrations in the plasma were measured. The geometric mean ratios [GMR] (90% confidence intervals [CIs]) for pranlukast AUC(0-infinity) and C(max) (with/without clarithromycin) were 1.06 (0.91, 1.24) and 1.17 (0.95, 1.45), respectively. In conclusion, clarithromycin and pranlukast could be coadministered without dose adjustment because clarithromycin minimally affected the pharmacokinetics of pranlukast.
Nakade
Susumu
S
Pharmacokinetic Research Laboratories, Ono Pharmaceutical Co., Ltd., Ibaraki, Japan. s.nakade@ono.co.jp
Yamauchi
Akinori
A
Komaba
Junji
J
Ohno
Tomoya
T
Kitagawa
Junsaku
J
Honda
Naoki
N
Hasegawa
Chihiro
C
Yoneda
Kazuhiro
K
Kodama
Yasuo
Y
Yasuda
Kuninobu
K
Azuma
Junichi
J
Miyata
Yasuyuki
Y
D000328:Adult; D002867:Chromones / Q000008:administration & dosage* / Q000493:pharmacokinetics*; D017291:Clarithromycin / Q000008:administration & dosage* / Q000009:adverse effects / Q000493:pharmacokinetics*; D018592:Cross-Over Studies; D004347:Drug Interactions; D004359:Drug Therapy, Combination; D006801:Humans; D008297:Male; D015203:Reproducibility of Results; D055815:Young Adult
D002867:Chromones; D017291:Clarithromycin; C047681:pranlukast