What each feels like in practice
- Daily dosing
- You take a small tablet with breakfast. After about five days, the drug is continuously present at a low level. Sex requires no planning, no timing and no tablet — it simply works the way it used to.
- On-demand dosing
- You take a tablet at least 30 minutes before sex, and you have a window of up to 36 hours. You are still making a decision in advance, but a far less time-pressured one than with sildenafil.
The cost comparison
People assume daily dosing must cost several times more. It usually does not, because the daily tablets are 2.5 or 5 mg while the on-demand tablets are 10 or 20 mg, and generic pricing is largely per tablet rather than per milligram.
| Scenario | Tablets per month | Typical generic cost |
|---|---|---|
| Daily 5 mg | 30 × 5 mg | $15–$50 |
| On-demand, sex once a week | 4–5 × 10 mg | $10–$25 |
| On-demand, sex three times a week | 12–13 × 10 mg | $20–$45 |
The crossover point is around two to three times a week. Below that, on-demand is usually cheaper; above it, daily dosing often wins on both cost and convenience.
Switching between regimens
- Do not overlap. Starting daily dosing the day after a 20 mg on-demand dose stacks the drug unnecessarily.
- Allow a couple of days between the last on-demand dose and starting daily dosing.
- Expect about five days on daily dosing before you are at steady state.
- If side effects — particularly back ache — appear on daily dosing, a lower daily dose often resolves them.
- Any switch should be agreed with your prescriber, not improvised.
FAQ
Frequently asked questions
Is daily tadalafil safe long term?
It has been used for years in both ED and prostate symptoms with a stable safety profile. It still warrants periodic review, especially if your other medications change.
Can I take an extra dose on top of my daily tablet?
No. Taking an on-demand dose on top of daily dosing exceeds the licensed maximum. If the daily dose is not enough, discuss increasing it with your prescriber.
How long until daily dosing works?
About five days to reach steady state, though some men notice a difference sooner.
Does daily dosing help prostate symptoms?
Yes — 5 mg daily tadalafil is licensed for benign prostatic hyperplasia, which makes it particularly efficient if you have both conditions.
Sources
What this is based on
We link to primary sources — clinical guidelines, regulator publications and peer-reviewed research — wherever possible. Links open on third-party sites we do not control.
- [01]U.S. Food and Drug Administration. Drugs@FDA — approved drug products and prescribing information.
- [02]American Urological Association. Erectile Dysfunction: AUA Guideline (2018).