Losartan and Rifampicin: Drug Interaction Guide

Quick answer: This combination requires caution. Losartan and Rifampicin can be used together with adjustments and monitoring.

Interaction severity: Moderate — caution required

How Losartan interacts with Rifampicin

Rifampicin induces CYP2C9 and CYP3A4, increasing metabolism of losartan and its active metabolite pathways. This may reduce antihypertensive efficacy.

What you should do

Monitor blood pressure after rifampicin initiation and discontinuation. Adjust antihypertensive therapy or choose an alternative agent if control worsens.

Key facts

Severity

Moderate — caution required

Mechanism

Rifampicin induces CYP2C9 and CYP3A4, increasing metabolism of losartan and its active metabolite pathways. This may red...

Action

Monitor blood pressure after rifampicin initiation and discontinuation. Adjust antihypertensive therapy or choose an alt...

Important medical disclaimer: This page provides educational information about drug interactions for general reference. It is not a substitute for professional medical advice, diagnosis, or treatment. Always discuss your specific medications with a qualified healthcare provider before starting, stopping, or changing any treatment. About our editorial team.

Frequently asked questions

Can I take Losartan and Rifampicin together?

With caution. Monitor blood pressure after rifampicin initiation and discontinuation. Adjust antihypertensive therapy or choose an alternative agent if control worsens.

What is the severity of this interaction?

The interaction between Losartan and Rifampicin is classified as Moderate — caution required. Rifampicin induces CYP2C9 and CYP3A4, increasing metabolism of losartan and its active metabolite pathways. This may reduce antihypertensive efficacy.

What should I do if I'm prescribed both?

Monitor blood pressure after rifampicin initiation and discontinuation. Adjust antihypertensive therapy or choose an alternative agent if control worsens. Always consult your prescribing clinician — do not stop or change medications without medical guidance.

Last reviewed: by iMedic Medical Editorial Team. Our editorial process.