Viagra (sildenafil) is usually taken about 30 to 60 minutes before sex, as a single dose, no more than once a day. The standard starting dose is 50 mg, which a doctor may raise to 100 mg or lower to 25 mg depending on how well it works and is tolerated. This article explains how to take 50 mg or 100 mg correctly.
It is a practical topic in our erectile dysfunction and men's health section.
The usual dose and timing
Most men start at 50 mg, taken roughly an hour before sex. It begins working in 30 to 60 minutes and lasts about 4 to 6 hours. Only one dose should be taken in a 24-hour period. Sexual stimulation is still needed for it to work.
50 mg versus 100 mg
If 50 mg works well and is well tolerated, there is no need to change. If the effect is insufficient, a doctor may increase it to 100 mg; if side effects are troublesome, the dose can be lowered to 25 mg. The aim is the lowest dose that works reliably.
| Dose | Typical use |
|---|---|
| 25 mg | start for older or sensitive men |
| 50 mg | standard starting dose |
| 100 mg | if 50 mg is not enough |
Getting the best result
Take it on an empty stomach or apart from a heavy, fatty meal, avoid excess alcohol, and allow time for it to work in a relaxed setting. These simple steps prevent many apparent "failures". See the effect of food on Viagra for detail.
Adjusting the dose safely
Dose changes should be guided by a doctor, not done on your own. Do not double up if one dose doesn't work, and never exceed one tablet a day. Taking more increases side effects without improving the result, as covered in can you overdose on Viagra.
Why a prescription matters
The right dose depends on your health, age and other medicines. A prescription ensures the dose suits you and that there are no dangerous interactions, especially with nitrates. Avoid buying sildenafil without a prescription. For how it works, see how Viagra makes you feel.
Food: effect of food. Overdose: can you overdose. How it feels: how Viagra makes you feel.
Common mistakes to avoid
A few avoidable mistakes account for many disappointing results. Taking the tablet right after a heavy meal, drinking too much alcohol, expecting it to work without arousal, or doubling the dose when the first 'fails' all undermine the outcome. Stick to one dose, give it time in a relaxed setting, and if it genuinely isn't working, talk to your doctor rather than experimenting with higher amounts.
Working with your doctor on the dose
Finding the right dose is a partnership with your doctor. Start at the prescribed amount, give it a fair trial under good conditions, and report back so the dose can be fine-tuned up or down as needed. This is far safer and more effective than experimenting alone. Combined with sensible timing around food and alcohol, a doctor-guided dose gives the best balance of reliable effect and minimal side effects.
Frequently asked questions
- How do I take Viagra 50mg or 100mg?
- About 30–60 minutes before sex, one dose a day, ideally apart from a heavy meal.
- Is 100 mg better than 50 mg?
- Not necessarily; 50 mg is the standard start, and 100 mg is used only if 50 mg is not enough.
- How often can I take it?
- No more than once in 24 hours.