Tadalafil is unique among ED medications because it is licensed for two distinct dosing regimens. You can take a higher dose as needed before sexual activity, or a lower dose every day. Both approaches are MHRA-approved and supported by clinical evidence.
As-Needed Dosing
The as-needed dose is 10 mg or 20 mg, taken at least 30 minutes before anticipated sexual activity. Because tadalafil lasts up to 36 hours, you do not need to time it as precisely as sildenafil.
This approach suits men who:
- Have sex once or twice a week, or less frequently
- Prefer not to take a daily medication
- Want to minimise overall medication intake
Daily Dosing
The daily dose is 2.5 mg or 5 mg taken at the same time each day, regardless of when you plan to have sex. After a few days the drug reaches a steady level in your bloodstream, so you are effectively always ready.
This approach suits men who:
- Have sex more than twice per week
- Want fully spontaneous sexual activity without planning
- Also have benign prostatic hyperplasia (BPH) — daily tadalafil 5 mg is licensed for BPH symptoms too
- Experience better tolerability with a lower, steady dose
Effectiveness
Clinical trials have shown both regimens to be effective and well tolerated. Some men who do not respond well to the as-needed dose find that switching to daily dosing improves results, possibly because the consistent drug levels provide a more reliable effect.
Side Effects
Side effects are generally milder with the daily dose because the amount of tadalafil per dose is much smaller. Common side effects include headache, indigestion, back pain, and nasal congestion. These tend to diminish after the first few weeks of daily use.
Cost Considerations
Daily dosing means purchasing more tablets per month — typically 28–30 tablets versus perhaps 4–8 with as-needed use. However, the daily tablets (2.5 mg and 5 mg) are often priced lower per unit. Your total monthly cost will depend on how frequently you would otherwise take the as-needed dose. Many UK online pharmacies offer subscription plans for daily tadalafil that can reduce the per-tablet price.
Making the Decision
Speak with your prescriber about your sexual frequency, lifestyle preferences, and any other conditions such as BPH. There is no single correct answer — the best regimen is the one that fits your life.