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Sildenafil 20mg Tablets

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Prescription Required

Total price updated to $9.70

SKU: *SILDENAFIL20

$9.70

Total price updated to $9.70

10 Count • tablet / $0.97

Selected quantity: 10. You can adjust the quantity using the minus and plus buttons, or enter a custom quantity in the input field.

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PRESCRIPTION REQUIRED:

This product requires a valid prescription for shipment, please note that HealthWarehouse may not accept prescriptions faxed or emailed by patients.

Why Are Prices at HealthWarehouse So Affordable?

HealthWarehouse is able to offer prescription medications at significantly lower prices than traditional brick-and-mortar pharmacies, largely because of how we operate. By removing many of the costs and intermediaries that drive up prices elsewhere, we pass those savings directly to you.

For instance, we don't process insurance claims, which means we don’t work with Pharmacy Benefit Managers (PBMs)—companies whose involvement often leads to increased drug costs for retail pharmacies. By avoiding these third parties, we streamline the supply chain and reduce expenses.

As an online-only pharmacy, we also avoid the typical overhead costs that come with running physical stores—like rent, utilities, and in-store staff. This efficient model helps us keep prices low while maintaining high standards of service and safety.

More Flexibility with Larger Orders

Another benefit of our approach: we can offer larger quantities of medication than what insurance typically allows. Insurance plans often limit orders to 30- or 90-day supplies and impose restrictions on refills. Because we don’t bill insurance, your doctor can write a prescription for up to a one-year supply in many cases—saving you both time and money.

Free Shipping on All Orders

No hidden fees here—every prescription order ships free within the United States and its territories. Orders go out Monday through Friday, and we work hard to make sure you get your medication quickly and reliably.

Ordering Sildenafil with HealthWarehouse

Getting your prescription filled is simple:

  1. Add the medication to your cart and proceed through checkout.

  2. We collect your prescription by contacting your prescriber or transferring from another pharmacy.

  3. Our pharmacy will review your prescription, patient information, and fill your order.

  4. We'll ship your order straight to your door—shipping is always free.

How to Refill Your Prescription

Refilling is easy:

  1. Click the login button at the top right of our website.

  2. Once you’re logged in, it will greet you by name (e.g., "Hello, John").

  3. Click your name, then select “Prescriptions.”

  4. You can reorder from your prescription list or search for the medication and check out as usual.

Don’t forget to try AutoReorder, where you can truly submit it and forget it!

Customer Support That Actually Helps

Have a question or need a hand? Our U.S.-based customer support team is available to assist you. Just give us a call at 1-800-748-7001. We’re here to help.

Why Consider Buying in Bulk?

Buying Sildenafil in higher quantities reduces the price per tablet and means fewer trips to the virtual pharmacy. It’s an easy way to save money and time.

What Is Sildenafil Prescribed For?

Sildenafil is commonly used to treat erectile dysfunction (ED) by helping increase blood flow to the penis during sexual activity. It’s also prescribed under the brand name Revatio for people with pulmonary arterial hypertension (PAH)—a condition that affects the blood vessels in the lungs. In this case, it works by relaxing those vessels and improving overall circulation.

Off-Label Uses of Sildenafil

In addition to its approved uses, doctors sometimes prescribe Sildenafil for other conditions where improving blood flow can be helpful. These include:

  • Raynaud’s phenomenon – Can help reduce the frequency and severity of flare-ups by improving circulation in the fingers and toes.

  • Heart failure with preserved ejection fraction (HFpEF) – May be prescribed to improve exercise tolerance and ease symptoms in select patients.

  • Other circulatory issues – In rare cases, it’s used under medical supervision when standard treatments aren’t effective.

Off-label use should always be guided by a healthcare professional.

Possible Side Effects of Sildenafil

Most people tolerate Sildenafil without serious issues, but side effects can happen. These are the most commonly reported:

Mild to moderate effects:

  • Headache

  • Flushed skin (especially in the face or chest)

  • Nasal congestion

  • Indigestion or upset stomach

  • Back pain

  • Dizziness

More serious reactions (seek medical help right away):

  • Sudden vision or hearing loss

  • Chest pain or an irregular heartbeat

  • A prolonged erection lasting more than 4 hours (known as priapism)

  • Fainting or severe lightheadedness

Medication Interactions to Be Aware Of

Sildenafil can interact with certain medications, sometimes in dangerous ways. Be especially cautious if you’re taking:

  • Nitrates (like nitroglycerin): This combination can cause a severe and sudden drop in blood pressure.

  • Alpha-blockers: May increase the risk of dizziness or fainting due to lowered blood pressure.

  • Some antifungal and antibiotic medications, such as ketoconazole or erythromycin.

  • Certain HIV treatments, like ritonavir or saquinavir, which may raise Sildenafil levels in your system.

To stay safe, always let your healthcare provider know about everything you’re taking—prescriptions, over-the-counter meds, vitamins, and herbal supplements.

IMPORTANT: HOW TO USE THIS INFORMATION: This is a summary and does NOT have all possible information about this product. This information does not assure that this product is safe, effective, or appropriate for you. This information is not individual medical advice and does not substitute for the advice of your health care professional. Always ask your health care professional for complete information about this product and your specific health needs.

SILDENAFIL 20 MG (PULMONARY) - ORAL

(sil-DEN-a-fil)

COMMON BRAND NAME(S): Revatio

USES: Sildenafil is used to treat high blood pressure in the lungs (pulmonary hypertension). It works by relaxing and widening the blood vessels in your lungs which allows the blood to flow more easily. Decreasing high blood pressure in the lungs allows your heart and lungs to work better and improves your ability to exercise. This medication is not recommended for use in children.

OTHER USES: This section contains uses of this drug that are not listed in the approved professional labeling for the drug but that may be prescribed by your health care professional. Use this drug for a condition that is listed in this section only if it has been so prescribed by your health care professional. Sildenafil is also available in other strengths for treating erectile dysfunction-ED in men. Do not substitute one form of this drug for the other.

HOW TO USE: Read the Patient Information Leaflet provided by your pharmacist before you start taking sildenafil and each time you get a refill. If you have any questions, ask your doctor or pharmacist. To treat high blood pressure in the lungs, take this medication by mouth as directed by your doctor, with or without food, usually 3 times a day (about 4-6 hours apart). Do not increase your dose or take this drug more often than prescribed. Avoid eating grapefruit or drinking grapefruit juice while using this medication unless your doctor or pharmacist says you may do so safely. Grapefruit can increase the chance of side effects with this medicine. Ask your doctor or pharmacist for more details. Take this medication regularly to get the most benefit from it. To help you remember, take it at the same times each day. Tell your doctor if your condition does not improve or if it worsens.

SIDE EFFECTS: Dizziness, lightheadedness, headache, flushing, stomach upset, nosebleeds, trouble sleeping, or swollen hands/ankles/feet (edema) may occur. Vision changes such as increased sensitivity to light, blurred vision, or trouble telling blue and green colors apart may also occur. If any of these effects persist or worsen, tell your doctor or pharmacist promptly. To reduce the risk of dizziness and lightheadedness, get up slowly when rising from a sitting or lying position. Remember that your doctor has prescribed this medication because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects. Rarely, sudden decreased vision in one or both eyes (NAION) may occur. This effect may or may not be caused by sildenafil. If this serious problem occurs, stop taking sildenafil and get medical help right away. You have a slightly greater chance of developing NAION if you have heart disease, diabetes, high cholesterol, certain other eye problems ("crowded disk"), high blood pressure, if you are over 50, or if you smoke. Rarely, a sudden decrease or loss of hearing, sometimes with ringing in the ears and dizziness, may occur. Stop taking sildenafil and get medical help right away if these effects occur. Rarely, males may have a painful or prolonged erection lasting 4 or more hours. If this occurs, stop using this drug and get medical help right away, or permanent problems could occur. Get medical help right away if you have any very serious side effects, including: increased shortness of breath or trouble breathing. A very serious allergic reaction to this drug is rare. However, get medical help right away if you notice any symptoms of a serious allergic reaction, including: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing. This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist. In the US - Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088. In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.

PRECAUTIONS: Before taking sildenafil, tell your doctor or pharmacist if you are allergic to it; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details. Before using this medication, tell your doctor or pharmacist your medical history, especially of: heart problems (such as heart attack or life-threatening irregular heartbeat in the past 6 months, chest pain/angina, heart failure), stroke in the past 6 months, kidney disease, liver disease, high or low blood pressure, a severe loss of body water (dehydration), penis conditions (such as angulation, fibrosis/scarring, Peyronie's disease), history of painful/prolonged erection (priapism), conditions that may increase the risk of priapism (such as sickle cell anemia, leukemia, multiple myeloma), eye problems (such as retinitis pigmentosa, sudden decreased vision, NAION), bleeding disorders, active stomach ulcers, other lung conditions (such as pulmonary veno-occlusive disease). This drug may make you dizzy or cause vision problems. Do not drive, use machinery, or do any activity that requires alertness or clear vision until you are sure you can perform such activities safely. Limit alcoholic beverages. Before having surgery, tell your doctor or dentist about all the products you use (including prescription drugs, nonprescription drugs, and herbal products). During pregnancy, sildenafil should be used only when clearly needed. Discuss the risks and benefits with your doctor. It is unknown if this medication passes into breast milk. Consult your doctor before breast-feeding.

DRUG INTERACTIONS: See also How to Use section. Drug interactions may change how your medications work or increase your risk for serious side effects. This document does not contain all possible drug interactions. Keep a list of all the products you use (including prescription/nonprescription drugs and herbal products) and share it with your doctor and pharmacist. Do not start, stop, or change the dosage of any medicines without your doctor's approval. Sildenafil can cause a serious drop in your blood pressure when used with nitrates, which can lead to dizziness, fainting, and rarely heart attack or stroke. Do not use sildenafil with any of the following: certain drugs used to treat chest pain/angina (nitrates such as nitroglycerin, isosorbide), recreational drugs called "poppers" containing amyl or butyl nitrite. If you are also taking an alpha blocker medication (such as doxazosin, tamsulosin) to treat an enlarged prostate/BPH or high blood pressure, your blood pressure may get too low which can lead to dizziness or fainting. Your doctor may adjust your medications to minimize your risk of low blood pressure. Other medications can affect the removal of sildenafil from your body, which may affect how sildenafil works. Examples include azole antifungals (such as itraconazole, ketoconazole), macrolide antibiotics (such as clarithromycin, erythromycin), HIV protease inhibitors (such as ritonavir, saquinavir), hepatitis C virus protease inhibitors (such as boceprevir, telaprevir), rifampin, among others. Do not take this medication with any other product that contains sildenafil or other similar medications for erectile dysfunction-ED or pulmonary hypertension (such as tadalafil, vardenafil).

OVERDOSE: If an overdose is suspected, contact a poison control center or emergency room immediately. US residents can call the US National Poison Hotline at 1-800-222-1222. Canada residents can call a provincial poison control center. Symptoms of overdose may include severe dizziness, fainting, painful/prolonged erection.

NOTES: Do not share this medication with others. Medical tests (such as blood pressure, eye exams) may be performed periodically to monitor your progress or check for side effects.

MISSED DOSE: If you miss a dose, take it as soon as you remember. If it is near the time of the next dose, skip the missed dose and resume your usual dosing schedule. Do not double the dose to catch up.

STORAGE: Store at room temperature away from light and moisture. Do not store in the bathroom. Keep all medications away from children and pets. Do not flush medications down the toilet or pour them into a drain unless instructed to do so. Properly discard this product when it is expired or no longer needed. Consult your pharmacist or local waste disposal company.

Information last revised September 2012. Copyright(c) 2012 First Databank, Inc.

Our team of customer service experts are here to help. Give us a call for assistance at1-800-748-7001for product support and questions.