Sildenafil for Erectile Dysfunction

Sildenafil is a prescription medication for the treatment of erectile dysfunction (ED) in adult men. It is the active ingredient in Viagra® and is sold as a generic under its ingredient name. Sildenafil belongs to a drug class called PDE5 inhibitors, which increase blood flow to the penis. A licensed healthcare provider reviews your health history and prescribes it only when it is medically appropriate. For ED it is used as needed rather than on a fixed daily schedule. It does not cause an erection without sexual stimulation and does not protect against sexually transmitted infections.

Take Sildenafil (Generic Viagra®) exactly as prescribed by your healthcare provider. Sildenafil is taken by mouth as needed, usually about 1 hour before sexual activity, and no more than once a day. It may be taken with or without food. A high-fat meal can make it take a little longer to start working.

Like all prescription medicines, Sildenafil (Generic Viagra®) can cause side effects. The most commonly reported side effects in the prescribing information include headache, flushing, upset stomach, vision changes, nasal congestion, back pain, muscle pain, nausea, dizziness, and rash. Most side effects are not emergencies, but some symptoms need urgent medical attention.

• Common side effects can include headache, flushing, and upset stomach.
• Some people report vision changes, stuffy or runny nose, back pain, muscle pain, nausea, dizziness, or rash.
• Get urgent medical help if you have an erection lasting more than 4 hours.
• Stop taking it and seek medical care right away if you have sudden vision loss or sudden hearing decrease or loss.
• Stop sexual activity and get medical help right away if you develop chest pain, dizziness, or nausea during sexual activity.

See full Important Safety Information

Sildenafil is a PDE5 inhibitor. In men with erectile dysfunction, it relaxes the smooth muscle of blood vessels in the penis so more blood can flow in. Sexual stimulation releases nitric oxide, which raises a signaling molecule called cGMP. Sildenafil blocks PDE5, the enzyme that breaks cGMP down, which helps a man with ED get and keep an erection. Without sexual stimulation, it does not cause an erection.

Yes, sildenafil is the active ingredient in Viagra®, so both contain the same medicine. Viagra® is the brand name Pfizer registered; the generic version uses the ingredient name instead. Both are taken by mouth as needed for ED and follow the same FDA-approved labeling, including the same warnings and dosing limits.

In men with erectile dysfunction, sildenafil improves blood flow to the penis, which helps them get and keep an erection with sexual stimulation. The effect lasts around four to six hours after a dose. It does not cause an erection by itself and is not a treatment for low sexual desire.

Headache, flushing, and an upset stomach are the side effects patients report most. The label describes most of these as common rather than emergencies.

Never take more than one dose in 24 hours. For erectile dysfunction, the labeling describes it as an as-needed medicine, not a scheduled daily tablet. Doubling up within 24 hours can lead to low blood pressure, serious side effects, or an overdose. The labeling leaves dose and timing decisions to the prescribing clinician.

Never take sildenafil with nitrates for chest pain or with riociguat (Adempas). Blood pressure can drop to an unsafe level. Skip other ED medicines, including tadalafil and Revatio, within 24 hours of a dose. Heavy alcohol can add to dizziness, headache, and low blood pressure. A high-fat meal before your dose can delay how quickly it starts working.

Yes, this medication is prescription-only in the US and always needs a provider’s approval. A licensed clinician reviews your health history, current medicines, and heart health before deciding whether treatment is appropriate. That check matters because the medicine interacts with heart and blood pressure drugs. On US Quick Health the review happens online through a short medical questionnaire.

No. Sildenafil and Viagra® contain the same active ingredient, so neither is stronger. Strength comes from the tablet dose your provider prescribes, not from the brand on the box. Both follow the same FDA-approved labeling for erectile dysfunction, the same warnings, and the same limit of one dose in 24 hours. Packaging can look different, but the medicine inside is the same.

Sildenafil is usually taken 30 minutes to 1 hour before sexual activity and starts working in that window. The effect generally lasts around four to six hours. A meal high in fat beforehand can push the start time back. Your healthcare provider can explain how to time your dose.

Sildenafil is the same medicine sold under the Viagra® brand, used the same way for erectile dysfunction. Because the active ingredient is identical, the label reports the same effects, side effects, and safety limits for both. The visible differences are the name and the tablet’s appearance.

Generic Viagra® is sildenafil sold under its ingredient name instead of Pfizer’s brand name. It treats erectile dysfunction and is a PDE5 inhibitor that increases blood flow to the penis. It follows the FDA-approved labeling written for Viagra®, including the same warnings.

Our pricing is clearly displayed at the top of every page, with no hidden or additional fees. Free, discreet delivery is always included. Subscriptions offer a lower price than one-time purchases and are the preferred choice for most customers. Your medication is delivered discreetly to your home automatically, and your next refill date is shown in your account.

VIAGRA (sildenafil citrate) - Official FDA-approved prescribing information including indications, dosing, contraindications, and safety warnings. Source: DailyMed (U.S. National Library of Medicine) Link: https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=0b0be196-0c62-461c-94f4-9a35339b4501 Published: November 17, 2023

VIAGRA (sildenafil citrate) tablets - FDA-approved prescribing information describing indications, dosage, contraindications, and safety warnings for sildenafil used to treat erectile dysfunction. / Source: U.S. Food and Drug Administration (FDA) Link: https://www.accessdata.fda.gov/drugsatfda_docs/label/2014/20895s039s042lbl.pdf / Published: March 11, 2014

VIAGRA Patient Information Leaflet - FDA-approved patient counseling information explaining how Viagra® is used, how to take it, and important safety information for patients. / Source: Pfizer (U.S. product labeling) Link: https://labeling.pfizer.com/ShowLabeling.aspx?id=652&section=ppi / Published: Not specified (Pfizer Patient Information section for U.S. labeling)