Key facts
- Strength is measured in milligrams (mg).
- A higher strength isn't automatically better.
- Your prescriber chooses the strength for you.
- Never take more than prescribed.
This explains available strengths only. It isn't dosing advice.
| Medicine | Tablet strengths commonly available in the UK |
|---|---|
| Sildenafil | 25mg, 50mg, 100mg |
| Tadalafil | 2.5mg, 5mg (often daily use), 10mg, 20mg |
Why strengths differ
Prescribers choose a strength based on your health, other medicines and how you respond. A higher strength can mean more side effects. Never change your dose without speaking to your prescriber.
Comparing prices? Our pack-size comparison compares the same strength across pack sizes.