Nitrendipine and Phenytoin: Drug Interaction Guide

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

Interaction severity: Moderate — caution required

How Nitrendipine interacts with Phenytoin

Phenytoin induces CYP3A4, which metabolizes many dihydropyridine calcium-channel blockers including nitrendipine. This can reduce antihypertensive efficacy.

What you should do

Monitor blood pressure after starting or stopping phenytoin. Adjust antihypertensive therapy or choose an alternative agent if control worsens.

Key facts

Severity

Moderate — caution required

Mechanism

Phenytoin induces CYP3A4, which metabolizes many dihydropyridine calcium-channel blockers including nitrendipine. This c...

Action

Monitor blood pressure after starting or stopping phenytoin. Adjust antihypertensive therapy or choose an alternative ag...

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 Nitrendipine and Phenytoin together?

With caution. Monitor blood pressure after starting or stopping phenytoin. Adjust antihypertensive therapy or choose an alternative agent if control worsens.

What is the severity of this interaction?

The interaction between Nitrendipine and Phenytoin is classified as Moderate — caution required. Phenytoin induces CYP3A4, which metabolizes many dihydropyridine calcium-channel blockers including nitrendipine. This can reduce antihypertensive efficacy.

What should I do if I'm prescribed both?

Monitor blood pressure after starting or stopping phenytoin. 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.