Viagra dosage: practical guide to safe use

If you're thinking about Viagra (sildenafil), the right dose matters. Most people start with 50 mg. That gives a balance between effect and side effects for many men.

Take it about 30–60 minutes before sex. You can take it up to 4 hours before, but the usual window is one hour. Don't take more than one dose in 24 hours.

How to choose the right dose

Doctors pick 25 mg, 50 mg, or 100 mg. Start at 50 mg if you’re healthy and not on interacting drugs. Pick 25 mg if you’re older, have liver or kidney problems, or take strong medicines that raise sildenafil levels (like certain antifungals, HIV protease inhibitors, or some antibiotics).

If 50 mg works but causes too many side effects, drop to 25 mg. If 50 mg is not effective, a doctor may raise you to 100 mg. Never self-increase past 100 mg in 24 hours.

Fatty meals slow how fast Viagra works. If you eat a heavy meal, expect a delay. Alcohol doesn't stop it but drinking a lot reduces blood flow and can blunt effects. One or two drinks are usually okay; more can cause dizziness or fainting when combined with sildenafil.

Grapefruit and grapefruit juice can raise sildenafil levels and increase side effects. Avoid grapefruit if you use Viagra regularly.

Also avoid taking Viagra with nitrates (for chest pain). Mixing nitrates and sildenafil can drop blood pressure suddenly. If you use alpha-blockers for prostate or blood pressure, talk to your doctor. They may adjust doses or test your blood pressure first.

Strong CYP3A4 inhibitors such as ritonavir, ketoconazole, and clarithromycin boost sildenafil levels. If you take these, doctors usually start at 25 mg and watch closely.

Safety and side effects

Common side effects include headache, flushing, indigestion, nasal congestion, and mild visual changes. These often pass within a few hours. If you get chest pain, severe dizziness, sudden vision loss, sudden hearing loss, or an erection lasting more than 4 hours, get emergency care.

If Viagra doesn't work after a few tries at the right dose and timing, talk to your doctor. Erectile problems can be a sign of cardiovascular disease, diabetes, or low testosterone, and may need more testing or a different treatment.

Many online sellers offer generic sildenafil. If buying online, choose a reputable pharmacy that requires a prescription. Cheap pills from unknown sites can be fake or unsafe.

Expect variability: Sildenafil works differently each time. Try it on three separate occasions before judging. Good foreplay and low anxiety improve results. Store pills in a cool dry place and check expiration. If you plan regular use, review heart health with your doctor—stress tests or blood pressure checks can be useful. Keep a simple log of doses and effects.

Start low, time it right, avoid nitrates and grapefruit, and talk to your doctor about interactions. Safe use gives the best results and fewer surprises.

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Jan

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