Impact-Site-Verification: 2721d812-1059-4270-b9fa-5c1654788cd1

Sildenafil Citrate Tablet — prescription drug image

Sildenafil Citrate

Sildenafil Citrate

QUAD by MEDVi · 4-in-1 ED treatment

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

See QUAD by MEDVi From $114/mo · Free online visit
QUAD by MEDVi is a compounded prescription treatment; eligibility is determined by a licensed provider after an online visit. Pricing and product details are set by MEDVi and may change. Not affiliated with, endorsed by, or equivalent to any brand-name medication or manufacturer.

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.

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
How long does it take for sildenafil to start working?
For erectile dysfunction, sildenafil is usually taken about an hour before sexual activity, though it can be taken anywhere from 30 minutes to 4 hours beforehand. Taking it with a heavy or high-fat meal may delay how quickly it works. It still requires sexual stimulation to produce an effect. Follow your prescriber's directions for your specific situation.
What is the difference between sildenafil and Viagra?
There is no difference in the active ingredient. Viagra is the original brand name, and sildenafil citrate is the generic version of the same medication. Because it is a generic, sildenafil citrate is usually much less expensive than brand-name Viagra.
Can I take sildenafil with blood pressure medication?
It depends on the specific medication. Sildenafil must never be combined with nitrates (such as nitroglycerin or isosorbide) or with riociguat, because this can cause a dangerous drop in blood pressure. Caution is also needed with alpha-blockers and other antihypertensives. Tell your doctor and pharmacist about every medication you take so they can check for interactions before you start sildenafil.
How long does sildenafil last in your system?
Sildenafil's effects for erectile dysfunction generally last around 4 to 6 hours, though this varies from person to person. The medication is gradually cleared from the body afterward. If an erection lasts more than 4 hours, seek emergency care, as this can be a serious condition.
What is the difference between Viagra and Revatio if both are sildenafil?
Both contain the same active ingredient, sildenafil, but they are FDA-approved for different uses and dosed differently. Viagra is approved for erectile dysfunction in adult men, while Revatio is approved for pulmonary arterial hypertension in adults and in children 1 year and older. You should only take the product and dose your prescriber has directed for your condition.
How much does Sildenafil Citrate 100MG cost without insurance?
The price of Sildenafil Citrate 100MG without insurance varies by pharmacy, dosage, and quantity. Rx.com compares cash prices at more than 60,000 US pharmacies so you can find the lowest price near you. Many people save 60–90% off retail prices with a free Rx.com coupon.
What are the common side effects of Sildenafil Citrate 100MG?
Common side effects of Sildenafil Citrate 100MG may include: 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. This is not a complete list — consult your pharmacist or doctor for full side effect information.
Is there a generic version of Sildenafil Citrate 100MG?
Generic versions may be available for Sildenafil Citrate 100MG. Generics contain the same active ingredients as brand-name drugs and are typically 80–90% cheaper. Search Sildenafil Citrate 100MG on Rx.com to compare generic and brand prices at pharmacies near you.
What is the cheapest pharmacy for Sildenafil Citrate 100MG?
The cheapest pharmacy for Sildenafil Citrate 100MG depends on your location and dosage. Rx.com compares prices at CVS, Walgreens, Walmart, Kroger, Costco, and thousands of independent pharmacies. Enter your ZIP code on Rx.com to find the lowest price for Sildenafil Citrate 100MG near you.

Sildenafil Citrate Coupons & Prices

Sildenafil Citrate

QUAD by MEDVi · 4-in-1 ED treatment

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

See QUAD by MEDVi From $114/mo · Free online visit
QUAD by MEDVi is a compounded prescription treatment; eligibility is determined by a licensed provider after an online visit. Pricing and product details are set by MEDVi and may change. Not affiliated with, endorsed by, or equivalent to any brand-name medication or manufacturer.
Sildenafil Citrate Tablet — prescription drug image
Prescription
Sildenafil Citrate 100mg (15)
your area ·
QUAD by MEDVi · 4-in-1 ED treatment

Sildenafil is one of the 4 meds in QUAD

Sildenafil, tadalafil, vardenafil & apomorphine · Works in ~15 min · Lasts up to 36 hours

$114/mo Consult, meds & shipping included 4-in-1 formula
See QUAD by MEDVi Free online visit · No commitment
QUAD by MEDVi is a compounded prescription treatment; eligibility is determined by a licensed provider after an online visit. Pricing and product details are set by MEDVi and may change. Not affiliated with, endorsed by, or equivalent to any brand-name medication or manufacturer.

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.

Sources & accuracy

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

Sponsored
Sesame Care — 350+ medications for $1 without insurance

Sildenafil Citrate — Articles & Guides

8 articles
Quad for Men Review: Does This 4-in-1 ED Supplement Work?
Quad for Men Review: Does This 4-in-1 ED Supplement Work?
Quad for Men promises prescription-like erection support without a doctor visit. Our clinicians dissect the formula, show what the science says, compare costs with sildenafil, and explain when you still need to see a healthcare provider.
Over-the-Counter Viagra Alternatives: What Works and What’s a Waste?
Over-the-Counter Viagra Alternatives: What Works and What’s a Waste?
Not every “Viagra-like” pill at the gas station does what it promises. Learn which over-the-counter options have any science behind them, the risks of hidden prescription ingredients, and the safest way to get effective erectile-dysfunction treatment today.
Does Baking Soda Help Erectile Dysfunction? Evidence, Risks & Better Options
Does Baking Soda Help Erectile Dysfunction? Evidence, Risks & Better Options
TikTok says a spoonful of baking soda can give you a stronger erection. The science says otherwise. Learn why sodium bicarbonate doesn’t treat erectile dysfunction, the real risks of DIY ‘cures,’ and evidence-backed options that do work.
How to Last Longer in Bed: Doctor-Approved Tips That Really Work
How to Last Longer in Bed: Doctor-Approved Tips That Really Work
Struggling to last as long as you’d like during sex? This in-depth guide explains why ejaculation happens quickly, who’s most at risk, and the doctor-approved techniques and medications that can help you extend pleasure for both partners.
Vardenafil (Levitra) for Erectile Dysfunction: Complete Patient Guide
Vardenafil (Levitra) for Erectile Dysfunction: Complete Patient Guide
Vardenafil—sold under the brand name Levitra—is a fast-acting ED tablet that can restore firm erections in as little as 30 minutes. This in-depth guide covers how the drug works, real success rates, common side-effects, safe dosing, and money-saving tips.
Why Sex Feels Hard: Performance Anxiety and Erectile Dysfunction
Why Sex Feels Hard: Performance Anxiety and Erectile Dysfunction
Struggling to stay hard when it matters? You’re not alone. This in-depth guide explains the link between anxiety and erectile dysfunction, shows how many men it affects, and walks you through proven fixes—from quick breathing tricks to prescription pills shipped discreetly by Rx.com.
How to Support a Partner With Erectile Dysfunction (Without Killing the Mood)
How to Support a Partner With Erectile Dysfunction (Without Killing the Mood)
Erectile dysfunction doesn’t just affect the person with the erection—it affects the couple. This guide explains why ED happens, what women say really helps, and how to get affordable treatment delivered to your door.
Erectile Dysfunction: The Truth About Causes, Cures & Ordering Treatment Online
Erectile Dysfunction: The Truth About Causes, Cures & Ordering Treatment Online
A doctor-reviewed guide to what really causes erectile dysfunction, science-backed fixes from lifestyle changes to prescription pills, and the fastest way to get treatment delivered to your door.
¿Buscando esta página en español?

Browse more medications: starting with S · full A-Z directory · by condition · common drugs

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.


Don't Miss Out On Savings!

Rx.com does not warrant the accuracy of the information on this website. All information on this site is intended to supplement, not substitute for, the expertise and judgment of your physician, pharmacist or other healthcare professional. It should not be construed to indicate that use of a drug is safe, appropriate, or effective for you. Consult your healthcare professional before using any drug. All logos, brand names and trademarks on this website are the property of their respective owners. Rx.com is not endorsed or affiliated with any brands represented on this website."

Pharmacy discounts are Not Insurance, and are Not Intended as a Substitute for Insurance THE DISCOUNT IS ONLY AVAILABLE AT PARTICIPATING PHARMACIES As an Amazon Associate, we earn from qualifying purchases.

2026 All Rights Reserved | Rx.com®