Drug interactions
Atazanavir + Brexpiprazole
Severity: Major
Atazanavir and Brexpiprazole: major interaction.
Last updated
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Summary
Atazanavir, a strong CYP3A4 inhibitor, raises brexpiprazole exposure. This can increase adverse effects such as akathisia, sedation and orthostatic hypotension.
What this interaction means in plain words
Atazanavir and Brexpiprazole 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; Brexpiprazole belongs to Central Nervous System.
Why it happens
Atazanavir inhibits CYP3A4, reducing the metabolism of brexpiprazole.
What to do
Give half the usual brexpiprazole dose. Reduce further to a quarter of the dose if a strong or moderate CYP2D6 inhibitor is also given.
What to ask your pharmacist
- 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?
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Other interactions of Brexpiprazole
Other interactions of Atazanavir
- Alfuzosin + Atazanavir Contraindicated
- Atazanavir + Avanafil Contraindicated
- Atazanavir + Dronedarone Contraindicated
- Atazanavir + Eletriptan Contraindicated
- Atazanavir + Eplerenone Contraindicated
- Atazanavir + Ergotamine Contraindicated
Frequently asked questions
Can I take Atazanavir with Brexpiprazole?
MediHelp rates the interaction as major. Atazanavir and Brexpiprazole 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, a strong CYP3A4 inhibitor, raises brexpiprazole exposure. This can increase adverse effects such as akathisia, sedation and orthostatic hypotension.
How serious is the interaction between Atazanavir and Brexpiprazole?
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 half the usual brexpiprazole dose. Reduce further to a quarter of the dose if a strong or moderate CYP2D6 inhibitor is also given.
What other medicines interact with Brexpiprazole?
MediHelp also lists interactions of Brexpiprazole with, for example, Alfentanil, Amisulpride, Apalutamide. The full list is on the Brexpiprazole page.
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