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[Pharmacokinetics and safety of aripiprazole long-acting injection, following multiple deltoid administrations in schizophrenia patients in Japan].

Ishigooka, Jun; Noda, Takamasa; Nishiyama, Kosuke; Tamaru, Noriko; Shima, Tomoko; Yamasaki, Yumiko; Tadori, Yoshihiro.
Nihon Shinkei Seishin Yakurigaku Zasshi; 36(3): 63-8, 2016 Jun.
Artigo em Japonês | MEDLINE | Ago 2016 | ID: mdl-27506082
Resumo: Aripiprazole once-monthly (AOM) was previously approved for treatment of schizophrenia as monthly injections in the gluteal muscle. The deltoid muscle provides a more accessible injection site. The present study was conducted in Japanese schizophrenia patients as a 24-week, open-label trial that assessed the pharmacokinetics and safety of 5 sequential doses of AOM 400 mg (AOM 400) once every 4 weeks administered in the deltoid muscle. Patients treated with an oral atypical antipsychotic (other than aripiprazole) continued to receive their pre-study medication up to 14 days after the first AOM 400 injection. The completion rate was 76.5% (n = 13/17). Mean aripiprazole plasma C(min) almost reached steady-state by the fourth AOM 400 injection. After the fifth AOM 400 injection, mean aripiprazole AUC(28d), C(max) and C(min) were 165 µg x h/ml, 331 ng/ml and 201 ng/ml, respectively, which were similar to previously published pharmacokinetic parameters after the fifth gluteal injection of AOM 400. The most common treatment-emergent adverse event (TEAE) was injection site pain (35.3%). Most TEAEs were classified as mild in intensity. In conclusion, the deltoid injection of AOM can be considered an alternative route of administration, as deltoid and gluteal injections are interchangeable in terms of aripiprazole plasma concentrations, with no additional safety issues.