Sildenafil Citrate
Sildenafil Citrate
Sildenafil is one of the 4 meds in QUAD
Sildenafil, tadalafil, vardenafil & apomorphine in one sublingual dose · Works in ~15 min · Lasts up to 36 hours
What is Sildenafil Citrate?
Sildenafil Citrate is a prescription medication used to treat erectile dysfunction (ED) by increasing blood flow to the penis, helping men achieve and maintain an erection when sexually stimulated. Known by the brand name Viagra, Sildenafil is one of the most widely prescribed ED medications available. Learn about Sildenafil uses, dosage, side effects, effectiveness, and how to get a Sildenafil prescription online through Rx.com with convenient mail-order delivery.
Side Effects
- Sudden loss of vision
- Allergic reaction: Itching or hives, swelling in your face or hands, swelling or tingling in your mouth or throat, chest tightness, trouble breathing
- Chest pain, trouble breathing, sudden or severe headache
Warnings
- Tell your doctor if you are pregnant or breastfeeding, or if you have kidney disease, liver disease, pulmonary veno-occlusive disease, diabetes, bleeding problems, leukemia, multiple myeloma, sickle cell anemia, a stomach ulcer, or eye problems. Tell your doctor if you have angina or chest pain during sex, heart disease, heart rhythm problems, high or low blood pressure, or a history of heart attack or stroke. Also tell your doctor if you smoke.
- Tell any doctor who treats you that you take sildenafil.
- This medicine may cause the following problems: Low blood pressure (especially if taken with other medicines that lower blood pressure)Heart problemsPainful or prolonged erectionVision or hearing problems
- Keep all medicine out of the reach of children. Never share your medicine with anyone.
- Painful erection or an erection that lasts longer than 4 hours
Prescription savings · · · ·
What is Sildenafil Citrate ?
Sildenafil Citrate is a prescription medication used to treat erectile dysfunction (ED) by increasing blood flow to the penis, helping men achieve and maintain an erection when sexually stimulated. Known by the brand name Viagra, Sildenafil is one of the most widely prescribed ED medications available. Learn about Sildenafil uses, dosage, side effects, effectiveness, and how to get a Sildenafil prescription online through Rx.com with convenient mail-order delivery.
- Sudden loss of vision
- Allergic reaction: Itching or hives, swelling in your face or hands, swelling or tingling in your mouth or throat, chest tightness, trouble breathing
- Chest pain, trouble breathing, sudden or severe headache
- Fast, slow, pounding, or uneven heartbeat
- Lightheadedness, fainting
- Painful erection or an erection that lasts longer than 4 hours
- Sudden decrease in hearing or hearing loss, ringing in the ears, dizziness
- Tell your doctor if you are pregnant or breastfeeding, or if you have kidney disease, liver disease, pulmonary veno-occlusive disease, diabetes, bleeding problems, leukemia, multiple myeloma, sickle cell anemia, a stomach ulcer, or eye problems. Tell your doctor if you have angina or chest pain during sex, heart disease, heart rhythm problems, high or low blood pressure, or a history of heart attack or stroke. Also tell your doctor if you smoke.
- Tell any doctor who treats you that you take sildenafil.
- This medicine may cause the following problems: Low blood pressure (especially if taken with other medicines that lower blood pressure)Heart problemsPainful or prolonged erectionVision or hearing problems
- Keep all medicine out of the reach of children. Never share your medicine with anyone.
- Painful erection or an erection that lasts longer than 4 hours
- Sudden loss of vision
- Sudden decrease in hearing or hearing loss, ringing in the ears, dizziness
Sildenafil Citrate Coupons & Prices
Sildenafil Citrate
Sildenafil is one of the 4 meds in QUAD
Sildenafil, tadalafil, vardenafil & apomorphine in one sublingual dose · Works in ~15 min · Lasts up to 36 hours
Sildenafil is one of the 4 meds in QUAD
Sildenafil, tadalafil, vardenafil & apomorphine · Works in ~15 min · Lasts up to 36 hours
Looking for a sildenafil citrate coupon? Sildenafil citrate is the low-cost generic form of Viagra and Revatio, and because it is already available as a generic, the cash price is often a fraction of the brand. But prices for the same tablet can vary widely from one pharmacy to the next, so it pays to compare. Enter your ZIP above to see today's price for sildenafil citrate across more than 60,000 U.S. pharmacies and use the free Rx.com discount card at checkout, no insurance required.
What is sildenafil citrate and how does it work?
Sildenafil citrate is a phosphodiesterase type-5 (PDE5) inhibitor. It works by enhancing the effect of nitric oxide, which relaxes smooth muscle and widens blood vessels to improve blood flow. It is the active ingredient in several FDA-approved brand products, sold under the names Viagra, Revatio, and Liqrev.
Its FDA-approved uses depend on the brand. As Viagra, sildenafil treats erectile dysfunction (ED) in adult men. As Revatio and Liqrev, sildenafil treats pulmonary arterial hypertension (PAH, WHO Group I) in adults, and Revatio is also approved for children 1 year and older, to improve exercise ability and delay clinical worsening. The generic, sildenafil citrate, contains the same active ingredient as these brand-name drugs.
Sildenafil citrate cost and savings without insurance
Because sildenafil citrate is available as a generic, it is typically far less expensive than brand-name Viagra or Revatio. Even so, the cash price for the exact same tablet and strength can differ significantly between pharmacies, which is why comparing before you fill matters. Enter your ZIP above to see today's price at pharmacies near you and print or text yourself the free Rx.com discount card, no insurance needed.
If you are prescribed the brand and prefer the manufacturer's own offer, Viagra has a manufacturer savings card at viagra.com/en/savings-card-download. Eligibility and terms vary, so review the details on that page. For most people, the generic sildenafil citrate is the more affordable route.
Sildenafil vs. Viagra and other alternatives
Sildenafil citrate and Viagra contain the same active ingredient; Viagra is simply the original brand name, while sildenafil citrate is the generic. Revatio is another brand of sildenafil, dosed for pulmonary arterial hypertension rather than ED. Other PDE5 inhibitors used for erectile dysfunction include tadalafil (brand Cialis), vardenafil, and avanafil.
These drugs differ mainly in how quickly they take effect and how long they last. Which one fits you best is a conversation to have with your prescriber. Whichever you are prescribed, compare its price above before you fill.
Safety and important warnings
Sildenafil citrate is not a controlled substance and carries no boxed warning, but there are important safety considerations. It must never be taken with nitrate medications (such as nitroglycerin or isosorbide) or with riociguat, because the combination can cause a severe, potentially fatal drop in blood pressure. Do not combine it with other PDE5 inhibitors such as tadalafil. Use caution with alpha-blockers and other blood pressure medicines. An erection lasting more than 4 hours (priapism) is a medical emergency.
Common side effects include headache, flushing, nasal congestion, upset stomach, and temporary changes in color or brightness of vision. Rare but serious events include sudden vision loss (NAION), sudden hearing loss, and cardiovascular problems such as heart attack or stroke, particularly in people with existing heart disease. This is general information, not medical advice, always talk with your doctor or pharmacist about your health and the medicines you take.
This Sildenafil Citrate information was written and reviewed against authoritative U.S. medical sources — MedlinePlus (U.S. National Library of Medicine), DailyMed, and FDA prescribing information — and checked for accuracy. It is provided for education and is not a substitute for professional medical advice.
Verify the official label: Sildenafil Citrate on DailyMed (FDA)
Reviewed against FDA labeling · Last reviewed July 2026
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Medical disclaimer: This information is provided for general educational purposes only and is not medical advice. It is not a substitute for professional diagnosis or treatment. Always consult a licensed physician, pharmacist, or other qualified healthcare provider before starting, stopping, or changing any medication or treatment. Never disregard professional medical advice or delay seeking it because of something you read here. If you think you may have a medical emergency, call your doctor or 911 immediately.