Viagra (sildenafil) is one of the most prescribed drugs for erectile dysfunction. If you’re thinking about dose and safety, this page gives quick, practical facts you can use right away. No fluff—just clear steps, common doses, and safety tips so you don’t guess.
Viagra usually comes in 25 mg, 50 mg, and 100 mg tablets. A common starting dose for most men is 50 mg taken about an hour before sexual activity. If 50 mg is too strong or causes side effects, doctors often drop the dose to 25 mg. If 50 mg doesn’t work well, they may increase it to 100 mg. Don’t take more than 100 mg in 24 hours.
Timing matters. Take Viagra 30–60 minutes before sex. Some men feel effects sooner, others later. Food can slow absorption: a heavy, fatty meal might delay how quickly it works. Alcohol can reduce effectiveness and raise the chance of side effects, so avoid heavy drinking when you plan to use it.
Never mix Viagra with nitrates. If you use nitroglycerin for chest pain or similar drugs, the combo can cause a dangerous drop in blood pressure. Also be careful with alpha-blockers and some blood pressure medicines—talk to your doctor if you take any heart meds.
Common side effects include headache, flushing, nasal congestion, upset stomach, and blurred vision. Most are mild and short-lived. If you get chest pain, fainting, severe dizziness, or a painful erection lasting more than 4 hours (priapism), seek emergency care.
Kidney or liver problems may change the dose your doctor recommends. Older adults sometimes start with a lower dose because they may be more sensitive to side effects. If you have a history of stroke, heart disease, or low blood pressure, discuss risks with your provider before taking Viagra.
If you take medicines like certain antibiotics, antifungals, or HIV protease inhibitors, those can raise sildenafil levels in your blood. Your doctor may reduce your dose or suggest a different treatment.
There are other PDE5 inhibitors such as tadalafil (longer-lasting) and vardenafil. Each has different timing, side effects, and interactions, so discuss options if Viagra doesn’t fit your life.
Want to try Viagra? Get a proper prescription and a short check-up. Self-medicating or buying pills from unknown sources can be risky. A quick chat with a clinician can confirm the right dose, rule out unsafe interactions, and point to alternatives if needed.
Questions about your dose or side effects? Reach out to your healthcare provider. They’ll help you find the safest, most effective approach for your situation.
