title: Usefulness and pharmacokinetic study of oral terbinafine for hyperkeratotic-type tinea pedis.
abstract: To study and establish an optimal administration method of oral antifungal, terbinafine (TBF), for hyperkeratotic-type tinea pedis from the pharmacokinetic point of view, 20 patients with hyperkeratotic-type tinea pedis were given TBF 125 mg once daily for 4 weeks and observed over time for improvement of dermatological symptoms and mycological efficacy. Targeting five of the patients, TBF concentration in the stratum corneum was measured using the LC-MS/MS method. TBF was detected in the stratum corneum of the sole 1 week after beginning the treatment in some cases and reached its peak 1 week after the completion of the treatment with a concentration of 247.8 ng g(-1), which was approximately more than 50 times higher than its minimal inhibitory concentration against dermatophytes. TBF was not detected at 8 weeks post-treatment, although its concentration was 50.73 ng g(-1) at 6 weeks post-treatment. All cases were subjected to analysis for final total efficacy, general safety and usefulness. Its effectiveness rate (effective + markedly effective) was 95% (19/20) with no adverse reactions, including abnormal changes in the laboratory test values, in any patients. From the above, it is noted that TBF showed excellent efficacy and safety for refractory hyperkeratotic-type tinea pedis, and also it was considered as a useful drug to treat cutaneous mycosis, including hyperkeratotic-type tinea pedis, from the pharmacokinetic point of view.
authors.affiliation: Department of Dermatology, Nippon Medical School, Tokyo, Japan. ogy@nms.ac.jp
authors.forename: Izumi
authors.initials: I
authors.lastname: Kikuchi
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Tanuma
authors.forename: Kensuke
authors.initials: K
authors.lastname: Morimoto
authors.forename: Seiji
authors.initials: S
authors.lastname: Kawana
mesh_terms: D000284:Administration, Oral; D000818:Animals; D000935:Antifungal Agents / Q000008:administration & dosage / Q000009:adverse effects / Q000493:pharmacokinetics* / Q000627:therapeutic use*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009281:Naphthalenes / Q000008:administration & dosage / Q000009:adverse effects / Q000493:pharmacokinetics* / Q000627:therapeutic use*; D012867:Skin / Q000737:chemistry; D053719:Tandem Mass Spectrometry; D000077291:Terbinafine; D014008:Tinea Pedis / Q000188:drug therapy*; D016896:Treatment Outcome
chemical_list: D000935:Antifungal Agents; D009281:Naphthalenes; D000077291:Terbinafine