Viagra can be prescribed to most adult men with erectile dysfunction who do not have a condition that makes it unsafe — chiefly the use of nitrates or serious heart disease. As for how often, the usual limit is once a day, taken when needed. This article explains who qualifies and the frequency rules.
It belongs in our erectile dysfunction and sexual dysfunction solutions section.
Who is a typical candidate?
The typical candidate is an adult man with persistent difficulty getting or keeping an erection. Before prescribing, a clinician reviews heart health, blood pressure and other medicines. Many men with well-controlled diabetes or hypertension can still be prescribed it — suitability is individual.
Who should not take it?
It is unsafe for anyone taking nitrates for chest pain, and it calls for great caution after a recent heart attack or stroke, with severe heart disease, very low blood pressure or certain eye conditions. This is exactly why a prescription assessment exists.
| Profile | Usually prescribable? |
|---|---|
| Healthy adult man with ED | yes, with assessment |
| Taking nitrates | no |
| Severe heart disease | only after careful review |
How often can it be taken?
Sildenafil is taken on demand, generally no more than once in any 24-hour period. Taking more than the prescribed dose does not improve results and raises the risk of side effects. The daily-use model is different and applies to tadalafil, not standard sildenafil.
What happens at the assessment?
The clinician asks about symptoms, medical history and medicines, and may check blood pressure or order tests. ED can be an early sign of cardiovascular disease, so the review is partly a general health check too — a benefit, not just a formality.
The bottom line
Most adult men with ED can be prescribed Viagra after a safety check, and the standard rule is once daily as needed. The nitrate exclusion is firm. For where to obtain it once prescribed, see where to buy pills.
Buying: Where to buy pills. Cost: Cost with a prescription. Interactions: Drug interactions.
Frequently asked questions
- Who can be prescribed Viagra?
- Most adult men with ED who do not use nitrates or have serious heart conditions, after an assessment.
- How often can I take it?
- Usually no more than once a day, on demand; more does not help and raises side-effect risk.
- Can men with diabetes take it?
- Often yes, if otherwise suitable; the clinician decides based on overall health.