Methadone pharmacokinetics in opioid agonist treatment: Influencing factors and clinical implications.
Basic Clin Pharmacol Toxicol
; 134(3): 333-344, 2024 Mar.
Article
em En
| MEDLINE
| ID: mdl-38124280
ABSTRACT
BACKGROUND:
A considerable inter-individual variability has been reported in the relationship between methadone doses applied and serum concentrations achieved in methadone maintenance treatment. However, the underlying causes for this variability are not fully understood.OBJECTIVES:
We investigated the influence of genetic, pathophysiological and pharmacological factors on serum methadone concentration-to-dose ratio (CDR) and discussed the clinical implications of the findings.METHODS:
We used data from two retrospective laboratory databases and a prospective cohort study to investigate the impact on methadone CDR of hepatic cytochrome P450 enzyme system (CYP) genetic polymorphisms, age, sex, concomitant medication, liver fibrosis and body mass index through linear mixed model analyses.FINDINGS:
A positive association was found between CDR and the homozygous CYP2B6*6 genotype, concurrent treatment with CYP3A4 inhibitors and body mass index. CDR was lower among women and during concomitant use of CYP inducers. CDR was not associated with age or the degree of liver fibrosis in our investigations.CONCLUSIONS:
This research work supports the need for individually tailored dosage considering the various factors that influence methadone CDR. The gained knowledge can contribute to reducing the risks associated with the treatment and optimizing the desired outcomes.Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Metadona
/
Transtornos Relacionados ao Uso de Opioides
Limite:
Female
/
Humans
Idioma:
En
Revista:
Basic Clin Pharmacol Toxicol
Assunto da revista:
FARMACOLOGIA
/
TOXICOLOGIA
Ano de publicação:
2024
Tipo de documento:
Article
País de afiliação:
Noruega