Label: SILDENAFIL tablet

Pulmonary hypertension is abnormally high blood pressure within the lung arteries. This causes the right side of the heart to work too hard.

6.2 Postmarketing Experience

It is not known if the vision loss was caused by the medication. If you experience a sudden loss of vision while you are taking sildenafil, call your doctor immediately. Do not take any more doses of sildenafil or similar medications such as tadalafil (Cialis) or vardenafil (Levitra) until you talk to your doctor. There have been reports of heart attack, stroke, irregular heartbeat, bleeding in the brain or lungs, high blood pressure, and sudden death in men who took sildenafil for erectile dysfunction. Most, but not all, of these people sildenafil citrate tablets for female had heart problems before taking sildenafil.

What are the serious side effects of sildenafil?

It is not known whether these events were caused by sildenafil, sexual activity, heart disease, or a combination of these and other causes. Talk to your doctor about the risks of taking sildenafil. Some patients experienced a sudden decrease or loss of hearing after they took sildenafil or other medications that are similar to sildenafil. It is not known if the hearing loss was caused by the medication. If you experience a sudden loss of hearing, sometimes with ringing in the ears or dizziness, while you are taking sildenafil, call your doctor immediately.

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If you are taking sildenafil (Viagra) for erectile dysfunction, do not take any more doses of sildenafil (Viagra) or similar medications such as tadalafil (Cialis) or vardenafil (Levitra) until you talk to your doctor. If you are taking sildenafil (Liqrev, Revatio) for PAH, do not stop taking your medication until you talk to your doctor. Call your doctor if you have any unusual problems while you are taking this medication. If you experience a serious side effect, you or your doctor may send a report to the Food and Drug Administration's (FDA) MedWatch Adverse Event Reporting program online ( or by phone (1-800-332-1088). Keep this medication in the container it came in, tightly closed, and out of reach of children. Sildenafil relaxes the smooth muscle around the small blood vessels within the lungs, which decreases the heart's workload. This medication works to improve overall quality of life, tolerance to exercise, and energy levels of animals suffering from pulmonary hypertension. The most frequently reported adverse reactions include: Drug interactions can occur when Sildenafil is administered with rifampin, phenobarbital, itraconazole, ketoconazole, clarithromycin, erythromycin, and cimetidine.

• Sildenafil 20 mg tablets are sometimes used off-label for pulmonary hypertension.
• The medication can cause priapism, a painful, prolonged erection.
• Wait at least 24 hours before taking another dose.
• Avoid grapefruit juice, which can increase drug levels.
• Report any allergic reactions such as rash or difficulty breathing.

Do not administer with drugs that can lower blood pressure, including hypotensive drugs, amlodipine, alpha-adrenergic blockers (including phenothiazines, phenoxybenzamine, and phentolamine), nitroprusside sodium, and nitrates. Only administer this medication to the animal it was prescribed to treat.

The most frequently reported adverse reactions include: Sildenafil, 20 mg Tablet overdose: What to do? What to know before using Sildenafil, 20 mg Tablet Drug interactions can occur when Sildenafil is administered with rifampin, phenobarbital, itraconazole, ketoconazole, clarithromycin, erythromycin, and cimetidine. If your healthcare provider just prescribed sildenafil citrate (generic Viagra®) to treat your erectile dysfunction (ED) symptoms, you’re probably excited to get your mojo back. But it’s also understandable if your head is swimming with questions.

What side effects can this medication cause?

Store the tablets at room temperature and away from excess heat and moisture (not in the bathroom). Store the suspension at room temperature or in a refrigerator, but do not freeze it. Dispose of any unused suspension after 60 days. Keep all medication out of sight and reach of children as many containers are not child-resistant. Place the medication in a safe location – one that is up and away and out of their sight and reach.

Postmarketing Reports

Dispose of unneeded medications in a way so that pets, children, and other people cannot take them. Do not flush this medication down the toilet. Talk to your pharmacist about take-back programs in your community. Visit the FDA's Safe Disposal of Medicines website for more information. In case of overdose, call the poison sildenafil syrup control helpline at 1-800-222-1222.

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Information is also available online at If the victim has collapsed, had a seizure, has trouble breathing, or can't be awakened, immediately call emergency services at 911. Do not let anyone else take your medication. Ask your pharmacist any questions you have about refilling your prescription. Keep a written list of all of the prescription and nonprescription (over-the-counter) medicines, vitamins, minerals, and dietary supplements you are taking. Bring this list with you each time you visit a doctor or if you are admitted to the hospital. Like other PDE5 inhibitors, or phosphodiesterase type 5 inhibitors, sildenafil is a safe treatment for ED, if used as directed. It’s been Food and Drug Administration (FDA)-approved for this use since 1998, after all.

Warnings & Precautions

You should carry the list with you in case of emergencies. We'll collect your vet's information at checkout to verify the prescription. Click on image to open expanded view Item No. Usually shipped in 1-3 business days. $0.21 AutoShip & Save up to 30% We'll collect your vet's information at checkout to verify the prescription.

What is sildenafil used for?

"Sildenafil is available with a veterinarian prescription. It is often prescribed to treat lung and heart problems, including pulmonary hypertension. Sildenafil is a prescription drug that is regularly prescribed by veterinarians to treat heart and lung problems which include pulmonary hypertension. Sildenafil increases the blood pressure within the lung arteries. It is often prescribed for the treatment of pulmonary hypertension. In an effort to provide some answers to your lingering questions, this guide will explain how to take sildenafil for the best results, a typical starting dosage, and potential side effects to consider. But remember that you should always follow your provider’s instructions for taking sildenafil—or any medication, for that matter. Sildenafil belongs to a class of drugs known as PDE5 inhibitors. These medications block the PDE5 enzyme, resulting in the widening of your blood vessels to promote blood flow to the penis. This liquid sildenafil citrate increased blood flow results in an erection. However, sildenafil doesn’t affect your libido. You still need to be aroused to get and maintain an erection long enough to yield satisfying sex. Healthcare providers can prescribe sildenafil tablets in different doses.

A typical starting dose of sildenafil is 50 milligrams, which you’d take 30 minutes to four hours before sexual activity. Your provider may adjust your dosage depending on your needs and how you respond to the medication. It’s also possible you may get a prescription in doses that are multiples of 20 milligrams, including 20 milligrams, 40 milligrams, 60 milligrams, and 80 milligrams. In these cases, your sildenafil tablets would actually be the generic form of Revatio®, a medication that has the ingredient sildenafil, like Viagra, but is FDA-approved for pulmonary arterial hypertension (although it can be prescribed off-label for ED). Be sure to talk through all options with your healthcare provider.

What Are Warnings and Precautions for Sildenafil?

if you are a woman and you are taking sildenafil to treat PAH, tell your doctor if you are pregnant, plan to become pregnant, or are breastfeeding. If you become pregnant while taking sildenafil, call your doctor. if you are having surgery, including dental surgery, tell your doctor or dentist that you are taking sildenafil. if you are taking sildenafil to treat erectile dysfunction, tell your doctor if you have ever been advised by a healthcare professional to avoid sexual activity for medical reasons or if you have ever experienced chest pain during sexual activity. Sexual activity may be a strain on your heart, especially if you have heart disease.

What’s the difference between sildenafil and Viagra?

If you experience chest pain, dizziness, or nausea during sexual activity, call your doctor immediately and avoid sexual activity until your doctor tells you otherwise. tell all your healthcare providers that you are taking sildenafil. If you ever need emergency medical treatment for a heart problem, the healthcare providers who treat you will need to know when you last took sildenafil. Talk to your doctor about eating grapefruit and drinking grapefruit juice while taking this medicine. If you are taking sildenafil for erectile dysfunction, you are unlikely to miss a dose since this medication is taken as needed, not on a regular dosing schedule.

Mechanism of Action

If you are taking sildenafil for PAH, take the missed dose as soon as you remember it. However, if it is almost time for the next dose, skip the missed dose and continue your regular dosing schedule. Do not take a double dose to make up for a missed one. numbness, burning, or tingling in the arms, hands, feet, or legs pain in muscles, back, arms, or legs changes in color vision (seeing a blue tinge on objects or having difficulty telling the difference between blue and green) sudden severe loss of vision (see below for more information) erection that is painful or lasts longer than 4 hours rash; itching; hives; difficulty breathing or swallowing; swelling of the eyes, face, throat, tongue, or lips Some patients experienced a sudden loss of some or all of their vision after they took sildenafil or other medications that are similar to sildenafil. The vision loss was permanent in some cases. And, as is the case with taking any medication, following a professional’s medical advice is crucial.

Unlike some other ED meds, you don’t take sildenafil every day. Sildenafil is an as-needed medication that should be taken at least about 30 minutes to an hour before sexual activity, and its effects should last up to four hours. You should never take more than one dose per day.

• Sildenafil 20 mg is one of several available dosages.
• Be aware of potential side effects like dizziness and nausea.
• Inform your doctor about any heart history before use.
• Do not take sildenafil if you have recently had a stroke.
• Follow instructions precisely to ensure safe and effective use.

You may be prescribed sildenafil or Viagra if you struggle with the following symptoms: Getting erections that aren't as firm as you'd like them to be Getting erections that aren't as firm as you'd like them to be Some medications can upset your stomach if you don’t take them with food.