Searches for sildenafil tablets often begin with a brand name or a number. A safer starting point is the full medicine label: active ingredient, strength, dosage form, manufacturer, authorization details and patient leaflet. This guide explains those fields without recommending a dose or product.
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.
What the active-ingredient name means
Sildenafil is the active substance in the authorized medicine Viagra, according to the European Medicines Agency. A different brand name does not, by itself, prove that a product has the same composition, quality standard or authorization status. Confirm the ingredient on the physical pack and in the official leaflet for your market.
How to understand the strength field
A number followed by mg describes the amount of active ingredient stated for one dosage unit; it is not a ranking of quality and it is not a personal recommendation. Higher numbers can change both potential effects and risks. Only a qualified prescriber or pharmacist with your health and medication history can advise what is appropriate.
Key safety context
EMA product information says sildenafil must not be used with nitrates for angina or guanylate-cyclase stimulators such as riociguat. Other conditions and medicines also matter. Read the patient leaflet and get individual advice before use.
Product verification checklist
- Active ingredient and exact strength per tablet
- Dosage form and number of units in the pack
- Manufacturer and marketing-authorization information
- Batch number, expiry date and intact tamper features
- Leaflet language and country-specific prescription status
Frequently asked questions
Is a larger mg number automatically better?
No. Strength is not a quality score. Suitability is individual and must be assessed by a healthcare professional.
Can I identify sildenafil from tablet colour?
No. Colour and shape are not reliable proof of identity. Use the labelled pack, leaflet and licensed supply chain.
Official sources and further reading
Last reviewed: September 2026. Product authorizations and national rules can change; re-check official sources before publication or purchase.