Drug Interactions Guide

Evidence-based information on common drug-drug interactions. Each entry includes severity, mechanism, and clinical recommendations.

Browse 30 Common Interactions

Ibuprofen & Aspirin

Moderate — caution required

Warfarin & Ibuprofen

Major — avoid combination

Warfarin & Aspirin

Major — avoid combination

Amlodipine & Simvastatin

Moderate — caution required

Clopidogrel & Omeprazole

Moderate — caution required

Metformin & Alcohol

Moderate — caution required

Ssri & Tramadol

Major — avoid combination

Metformin & Contrast Dye

Major — avoid combination

Ibuprofen & Lisinopril

Moderate — caution required

Paracetamol & Alcohol

Moderate — caution required

Levothyroxine & Calcium

Moderate — caution required

Levothyroxine & Iron

Moderate — caution required

Digoxin & Amiodarone

Major — avoid combination

Statin & Grapefruit Juice

Moderate — caution required

Ssri & Nsaid

Moderate — caution required

Ace Inhibitor & Potassium

Moderate — caution required

Metoprolol & Verapamil

Major — avoid combination

Ssri & Maoi

Major — avoid combination

Nitrates & Sildenafil

Major — avoid combination

Oral Contraceptive & Rifampicin

Major — avoid combination

Methotrexate & Trimethoprim

Major — avoid combination

Lithium & Ibuprofen

Major — avoid combination

Lithium & Thiazide Diuretic

Major — avoid combination

Warfarin & Antibiotic

Major — avoid combination

Clopidogrel & Ssri

Moderate — caution required

Amiodarone & Warfarin

Major — avoid combination

Metformin & Iv Contrast

Major — avoid combination

Ssri & Warfarin

Moderate — caution required

Statin & Fibrate

Major — avoid combination

Calcium Channel Blocker & Beta Blocker

Moderate — caution required

About This Guide

Drug interactions can range from clinically insignificant to life-threatening. This guide summarizes the most common and important interactions in everyday clinical practice, sourced from peer-reviewed pharmacology references.

This is educational information, not medical advice. Always consult your prescribing clinician about your specific medications.