You can cut or crush the tablet. When you take the drug depends on the condition being treated:For ED: You can take this drug at any time of day.For PAH: Take this drug three times per day about 4–6 hours apart. Take it at the same time every day. For ED: You can take this drug at any time of day. For PAH: Take this drug three times per day about 4–6 hours apart.

Comparing Which Works Faster

For PAH: This medication may not work as well or may stop working completely. For this drug to work well, a certain amount needs to be in your body at all times. If you take too much: You could have dangerous levels of the drug in your body. Symptoms of an overdose of this drug can include: If you think you’ve taken too much of this drug, call your doctor or local poison control center. If your symptoms are severe, call 911 or go to the nearest emergency room right away.

Dosage for pulmonary arterial hypertension (PAH)

What to do if you miss a dose: For ED: Take your dose 30 minutes to 4 hours before your next sexual activity. For PAH: Take your dose as soon as you remember. But if you remember just a few hours before your next scheduled dose, take only one dose. Never try to catch up by taking two doses at once. This could result in dangerous side effects. Store sildenafil tablets at room temperature between 59°F and 86°F (15°C and 30°C).

Don’t store this medication in moist or damp areas, such as bathrooms. A prescription for this medication is refillable.

• Sildenafil 20 mg tablets are manufactured by several pharmaceutical companies.
• Generic versions are usually less expensive than brand-name options.
• The drug works by inhibiting phosphodiesterase type 5 enzyme.
• Patients should report any unusual symptoms promptly.
• It is important to have a proper diagnosis before starting treatment.

You should not need a new prescription for this medication to sildenafil citrate sublingual tablets 100mg be refilled.

Your doctor will write the number of refills authorized on your prescription. When flying, never put it into a checked bag. Keep it in your carry-on bag. Don’t worry about airport X-ray machines. You may need to show airport staff the pharmacy label for your medication.

Always carry the original prescription-labeled container with you. Don’t put this medication in your car’s glove compartment or leave it in the car. Be sure to avoid doing this when the weather is very hot or very cold. If you’re taking this drug for PAH, your doctor may monitor your blood pressure and pulse regularly. When filling your prescription, be sure to call ahead to make sure your pharmacy carries it.

13.1 Carcinogenesis, Mutagenesis, Impairment of Fertility

For people with problems with the shape of their penis: If you have a problem with the shape of your penis, such as Peyronie’s disease, this drug raises your risk for having an erection that lasts more than 4 hours. For people with a history of stomach ulcers or bleeding: This drug raises your risk for stomach bleeding, ulcers, or small holes in the lining of your digestive system. These events can be fatal (cause death). They can happen at any time, with or without symptoms. For people with sickle cell anemia: This drug may cause a common painful complication of sickle cell anemia called vaso-occlusive crisis.

Are you currently using Sildenafil (Viagra, Revatio)?

If you have sickle cell anemia, ask your doctor whether this drug is safe for you. For pregnant women: Research in animals has not shown a risk to the fetus when the mother takes the drug. However, there aren’t enough studies done in humans using the drug for PAH to show if the drug poses a risk to the fetus. Talk with your doctor if you’re pregnant or planning to become pregnant. It appears unlikely that this drug will harm a pregnancy. Many insurance companies require prior authorization for this drug. This means your doctor may need to get approval from your insurance company before your insurance company will pay for the prescription. Sildenafil under the brand name Viagra is prescribed to treat erectile dysfunction by increasing blood flow to the penis during arousal. Sildenafil under the brand name Revatio is often prescribed to help adults with PAH get more exercise by treating their condition. What if I forget to take it? If you are taking Revatio and you forget to take your scheduled dose, take it as soon as possible. However, you should never double your dosage. If you completely miss a dose and it’s time for the next dose, skip the one you missed. Are there any safety measures I should take before using this drug? Like most medications, there are precautions you should take before using this drug. Make sure you talk with your doctor about: any other drugs, medications, herbs, or supplements you take or plan to take any medical conditions or surgeries you have or plan to have if you are pregnant or plan to become pregnant There are other drugs available to treat your condition. Some may be better suited for you than others.

What Other Drugs Interact with Sildenafil?

How to tell if the drug is working: For ED: You should be able to get and maintain an erection when sexually aroused. For PAH: You should be able to exercise more easily. Your doctor will also check you to determine if this drug is working. Keep these considerations in mind if your doctor prescribes sildenafil for you. You can take this drug with or without food. Talk with your doctor about other drug options that may work for you. Sildenafil and tadalafil are alike because they both can treat ED and PAH. However, tadalafil has a few distinctions from sildenafil. Tadalafil is the generic name for the erectile dysfunction drug Cialis. There are two versions of the drug: a version that can be taken as needed Cialis 5-mg daily dosing is the only PDE5 inhibitor dose approved for treating an enlarged prostate; improving ED symptoms is an added benefit of the daily dose. Because of the “as needed” version of tadalafil, some users may find this option more convenient. The downside, however, is that side effects tend to last longer too. The main difference between generic sildenafil and Viagra is marketing. The main ingredient in Viagra is sildenafil, meaning that the drugs are essentially the same.

8.5 Geriatric Use

However, this drug should only be used during pregnancy if clearly needed. Viagra or generic sildenafil for ED should not be used in women. For women who are breastfeeding: When used for PAH, sildenafil may pass into breast milk and may cause side effects in a child who is breastfed. Talk with your doctor if you breastfeed your child. You may need to decide whether to stop breastfeeding or stop taking this medication.

Less common

For seniors: The kidneys, liver, or heart of older adults may not work as well as they used to. This can cause your body to process drugs more slowly. As a result, a higher amount of a drug stays in your body for a longer time. This raises your risk for side effects. For children: This drug isn’t recommended in children younger than 18 years. However, Viagra is marketed and prescribed strictly for erectile dysfunction, while generic sildenafil can be prescribed for PAH as well.

• 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.

Viagra is also known as “the little blue pill” because of its blue color, while generic sildenafil tends to be a white color. Disclaimer: Healthline has made every effort to make certain that all information is factually correct, comprehensive, and up to date. However, this article should not be used as a substitute for the knowledge and expertise of a licensed healthcare professional.

What should I do if I forget a dose?

In one study, children with PAH who took this drug had an increased chance for death. All possible dosages and drug forms may not be included here. Your dosage, drug form, and how often you take the drug will depend on: how you react to the first dose Strengths: 25 mg, 50 mg, 100 mg Strengths: 25 mg, 50 mg, 100 mg Typical dosage: 50 mg, taken as needed about 1 hour before sexual activity. It can be taken 30 minutes to 4 hours before sexual activity. Maximum dosage: 100 mg once per day.

Usual Geriatric Dose for:

This drug has not been confirmed to be safe or effective in children younger than 18 years. Senior dosage (ages 65 years and older) The kidneys, liver, or heart of older adults may not work as well as they used to. This raises your risk of side effects. Your doctor may start you on a lowered dosage of sildenafil. This can help prevent levels of this drug from building up in your body. You should always consult your doctor or other healthcare professional before taking any medication.

• Sildenafil 20 mg tablets are available by prescription only.
• Common side effects include headaches, flushing, and nasal congestion.
• It is important to follow the prescribed dosage for safety.
• Avoid alcohol and high-fat meals when taking sildenafil.
• Consult a doctor if you experience sudden vision loss.

The drug information contained herein is subject to change and is not intended to cover all possible uses, directions, precautions, warnings, drug interactions, allergic reactions, or adverse effects. The absence of warnings or other information for a given drug does not indicate that the drug or drug combination is safe, effective, or appropriate for all patients or all specific uses. Sildenafil is used to treat male sexual function problems (impotence or erectile dysfunction-ED). In combination with sexual stimulation, sildenafil works by increasing blood flow to the penis to help a man get and keep an erection. Sildenafil does not protect against sexually transmitted diseases (such as HIV, hepatitis B, gonorrhea, syphilis). Practice "safe sex" such as using latex condoms. Consult your doctor or pharmacist for more details.

Detection in biological fluids

Typical dosage: 5 or 20 mg, taken three times per day about 4 to 6 hours apart Maximum dosage: 20 mg, taken three times per day about 4 to 6 hours apart This drug shouldn’t be used in children younger than 18 years of age. Disclaimer: Our goal is to provide you with the most relevant and current information. However, because drugs affect each person differently, we cannot guarantee that this list includes all possible dosages. Always speak with your doctor or pharmacist about dosages that are right for you. Sildenafil oral tablet is used for short-term treatment of ED and long-term treatment of PAH.

How does sildenafil work (mechanism of action)?

It comes with serious risks if you don’t take it as prescribed. If you stop taking the drug suddenly or don’t take it at all: For ED: Your ED symptoms won’t improve. For PAH: Your condition won’t improve and may get worse. Also, you won’t be able to exercise. If you miss doses or don’t take the drug on schedule: For ED: Your ED symptoms won’t improve. Sildenafil is also available in other brands and strengths for treating high blood pressure in the lungs (pulmonary hypertension). Do not take sildenafil with any other product that contains sildenafil or other similar medications for erectile dysfunction-ED or pulmonary hypertension (such as tadalafil, vardenafil).