Interações medicamentosas
Atazanavir + Cimetidine
Gravidade: Grave
Atazanavir and Cimetidine: major interaction.
Última atualização
Para profissionais de saúde — apenas referência. Esta página é um resumo breve, não é aconselhamento médico nem substitui a bula oficial ou o julgamento clínico. Verifique sempre antes de prescrever ou dispensar.
O conteúdo clínico desta página está disponível apenas em inglês.
Resumo
Atazanavir solubility falls as gastric pH rises, so H2 antagonists such as cimetidine can substantially lower its levels. This risks virologic failure and resistance.
O que esta interação significa em palavras simples
Atazanavir and Cimetidine can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.
Atazanavir belongs to Anti Virals; Cimetidine belongs to Gastrointestinal Tract.
Por que acontece
Increased gastric pH reduces atazanavir dissolution and absorption.
O que fazer
Give atazanavir at least 2 hours before or 10 hours after the H2 antagonist and keep within labeled maximum H2 antagonist doses. In treatment-experienced patients use atazanavir with ritonavir per labeling.
O que perguntar ao farmacêutico
- Does the benefit of taking both outweigh the risk in my case?
- Do I need any blood test, ECG or other check while on both?
- What early warning signs should I watch for, and what should I do if they appear?
Para assinantes do Pro+
Desbloqueie a página completa
Crie uma conta e comece um teste do Pro+ para desbloquear a orientação completa de conduta para Atazanavir e Cimetidine, as notas adicionais, os detalhes da evidência e o verificador de interações para uma prescrição completa.
- Full clinical management advice
- Additional notes
- Evidence detail
- Interaction checker for a whole prescription
Experimente o Pro+ grátis por 14 dias na web. Sem cartão.
Outras interações de Cimetidine
- Cimetidine + Dofetilide Contraindicada
- Cimetidine + Fezolinetant Contraindicada
- Alfentanil + Cimetidine Grave
- Carmustine + Cimetidine Grave
- Cimetidine + Citalopram Grave
- Cimetidine + Clozapine Grave
Outras interações de Atazanavir
- Alfuzosin + Atazanavir Contraindicada
- Atazanavir + Avanafil Contraindicada
- Atazanavir + Dronedarone Contraindicada
- Atazanavir + Eletriptan Contraindicada
- Atazanavir + Eplerenone Contraindicada
- Atazanavir + Ergotamine Contraindicada
Perguntas frequentes
Can I take Atazanavir with Cimetidine?
MediHelp rates the interaction as major. Atazanavir and Cimetidine can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. Atazanavir solubility falls as gastric pH rises, so H2 antagonists such as cimetidine can substantially lower its levels. This risks virologic failure and resistance.
How serious is the interaction between Atazanavir and Cimetidine?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Give atazanavir at least 2 hours before or 10 hours after the H2 antagonist and keep within labeled maximum H2 antagonist doses. In treatment-experienced patients use atazanavir with ritonavir per labeling.
What other medicines interact with Cimetidine?
MediHelp also lists interactions of Cimetidine with, for example, Dofetilide, Fezolinetant, Alfentanil. The full list is on the Cimetidine page.
Monografias completas, posologia e verificador de interações no app MediHelp
Abra a referência completa, verifique interações entre vários medicamentos e use as ferramentas de posologia no app MediHelp.
