Sildenafil and tadalafil are different active ingredients. Search results often place them side by side, but a name-level comparison cannot decide which medicine—or whether any medicine—is suitable for an individual.
Important: This article is general educational information. It does not recommend a product, diagnose a condition or replace a doctor or pharmacist. Availability, authorization and prescription rules differ by country. Only obtain medicines through a licensed, verifiable provider.
Two ingredients, two separate product-information records
EMA maintains separate product information for sildenafil-containing Viagra and tadalafil-containing Cialis. Each has its own authorized strengths, warnings and instructions. Use the leaflet for the exact authorized product, not a general web summary.
What can be compared safely
You can compare factual label fields: active ingredient, dosage form, strength, pack size, manufacturer, authorization holder, storage instructions and expiry. Do not convert those facts into personal dosing advice without a prescriber or pharmacist.
Shared safety themes
Both official records include serious cautions around nitrates and certain cardiovascular conditions. Other interactions differ. A complete medication review—including supplements and recreational substances—is important before use.
Product verification checklist
- Confirm which active ingredient is printed on the pack
- Read the exact patient leaflet for that product
- List current medicines and supplements for a pharmacist
- Check authorization and prescription status in the destination country
- Never combine or switch products without professional advice
Frequently asked questions
Are sildenafil and tadalafil the same medicine?
No. They are different active ingredients with separate product information.
Can a comparison article replace a consultation?
No. It can organize questions, but it cannot assess your medical history or interactions.
Official sources and further reading
Last reviewed: September 2026. Product authorizations and national rules can change; re-check official sources before publication or purchase.