Sildenafil treatment with physician-led online care.

Sildenafil is a prescription medication in the PDE5 inhibitor class. It is the generic active ingredient used in Viagra® and other prescription products, and requires evaluation by a licensed physician.

Sildenafil is used for erectile dysfunction, and certain products containing sildenafil have other FDA-approved indications. Which use, if any, applies to you is a clinical decision made by your physician.

During sexual stimulation, the body signals blood vessels in penile tissue to relax so blood flow can increase. Sildenafil inhibits the PDE5 enzyme that breaks down part of that signaling, supporting your body's natural erectile response.

Onset varies between individuals and can be influenced by the product prescribed, food, alcohol and other factors. Follow the instructions provided with your prescription rather than a general timeline you read online.

Sildenafil generally has a shorter duration of action than tadalafil, which is why it is typically used in relation to anticipated sexual activity. Duration does not mean a continuous erection, and individual response varies.

No. Sildenafil does not create an erection on its own. It supports the physiological pathway involved in an erection when sexual stimulation occurs.

Generally yes. Sexual stimulation is what starts the signaling that sildenafil supports.

Sildenafil is the active ingredient; Viagra® is a registered brand name for a product containing it. Products with the same active ingredient can differ in formulation, labeling and approved use, so your physician and pharmacy identify exactly what is prescribed.

Both are PDE5 inhibitors. Sildenafil is shorter-acting and generally used around anticipated sexual activity, while tadalafil has a longer duration of action and may be prescribed as-needed or with certain regular dosing approaches depending on the patient and indication.

Neither is automatically better. The appropriate choice depends on your health, other medications, previous response, side effects, goals and preferences — which is why it is a clinical decision rather than a comparison-chart decision.

Sildenafil for ED is generally prescribed in relation to anticipated sexual activity rather than as a continuous daily treatment. How and how often to use your medication comes from your prescription and your physician.

Food, particularly a heavy or high-fat meal, can affect how some patients experience sildenafil. Your physician and the prescribing information for your product can explain what applies to you.

Alcohol can add to the blood-pressure effects of sildenafil and may contribute to symptoms such as dizziness or flushing. Discuss alcohol use with your physician.

No. Sildenafil does not directly increase testosterone. If low testosterone is a concern, that is a separate clinical evaluation.

No. Sildenafil is not an aphrodisiac and does not increase libido. It supports the physical erectile response during stimulation.

Commonly reported effects may include headache, flushing, indigestion, nasal congestion, dizziness and visual changes such as color-tinted vision. Serious risks also exist — review the full prescribing information for your product and discuss any symptoms with your physician.

Sildenafil is not appropriate for everyone. Nitrate use, certain cardiovascular conditions, low or unstable blood pressure, some eye and organ conditions, and certain medications can make treatment inappropriate or require caution. Your physician screens for this during your evaluation.

Sildenafil can cause a dangerous drop in blood pressure when combined with nitrates such as nitroglycerin or isosorbide. If you take nitrates in any form, tell your physician — sildenafil should not be used when it is contraindicated.

Yes. Alpha-blockers and certain other blood-pressure medications can interact with sildenafil and affect blood pressure. Give your physician a complete list of everything you take, including supplements.

An erection lasting more than four hours requires urgent medical attention. Seek emergency care — delaying treatment can cause lasting damage.

Combining ED medications is not something to do on your own. In certain circumstances a physician may consider customized treatment approaches, including compounded formulations, when clinically appropriate. That is strictly a physician decision, and compounded products are not FDA-approved.

Yes. Sildenafil is a prescription medication in the United States and requires evaluation by a licensed physician.

The physician visit is $29. It covers your private online visit with a licensed NORBU MD physician.

No. The $29 fee covers the physician visit only. Medication, laboratory testing and other services, if applicable, are separate.

Yes. Your visit takes place online with a board-certified physician, and your medical information is handled confidentially as part of your care.

Yes. Care is ongoing. Your physician can adjust the approach, switch treatments or stop treatment based on your response, side effects and medical need.