Quinidine and Tamsulosin: Drug Interaction Guide

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

Interaction severity: Moderate — caution required

How Quinidine interacts with Tamsulosin

Quinidine inhibits CYP2D6, one of the metabolic pathways for tamsulosin. Increased tamsulosin exposure can increase orthostatic hypotension and syncope risk.

What you should do

Use caution, especially in patients prone to hypotension. Monitor blood pressure and consider alternative therapy if symptoms occur.

Key facts

Severity

Moderate — caution required

Mechanism

Quinidine inhibits CYP2D6, one of the metabolic pathways for tamsulosin. Increased tamsulosin exposure can increase orth...

Action

Use caution, especially in patients prone to hypotension. Monitor blood pressure and consider alternative therapy if sym...

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 Quinidine and Tamsulosin together?

With caution. Use caution, especially in patients prone to hypotension. Monitor blood pressure and consider alternative therapy if symptoms occur.

What is the severity of this interaction?

The interaction between Quinidine and Tamsulosin is classified as Moderate — caution required. Quinidine inhibits CYP2D6, one of the metabolic pathways for tamsulosin. Increased tamsulosin exposure can increase orthostatic hypotension and syncope risk.

What should I do if I'm prescribed both?

Use caution, especially in patients prone to hypotension. Monitor blood pressure and consider alternative therapy if symptoms occur. Always consult your prescribing clinician — do not stop or change medications without medical guidance.

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