12 CLINICAL PHARMACOLOGY

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.

11. Sildenafil Tablets Description

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. 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.

Less common

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. It comes with serious risks if you don’t take it as prescribed. If you stop taking the drug suddenly or don’t canadian sildenafil citrate take it at all: For ED: Your ED symptoms won’t improve. For PAH: Your condition won’t improve and may get worse. 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.

Product	Dosage	Quantity + Bonus	Price
Kamagra	100mg	20 Pills	86.09€ 81.99€	Buy
Viagra Generic	200mg	180 + 10 Pills	277.56€ 264.34€	Buy
Viagra Generic	100mg	60 + 4 Pills	96.36€ 91.77€	Buy
Kamagra Soft Tabs	100mg	60 + 4 Pills	180.59€ 171.99€	Buy
Kamagra Oral Jelly	100mg	220 + 18 Sachets	662.24€ 630.70€	Buy
Viagra Generic	50mg	90 + 6 Pills	107.37€ 102.26€	Buy
Viagra Generic	25mg	10 Pills	25.19€ 23.99€	Buy
Kamagra Oral Jelly	100mg	30 + 5 Sachets	136.20€ 129.71€	Buy
Kamagra Oral Jelly	100mg	110 + 9 Sachets	334.87€ 318.92€	Buy
Viagra Generic	150mg	90 + 6 Pills	147.18€ 140.17€	Buy
Viagra Generic	25mg	180 + 6 Pills	154.93€ 147.55€	Buy
Kamagra Soft Tabs	100mg	272 + 12 Pills	593.42€ 565.16€	Buy
Viagra Generic	50mg	270 + 8 Pills	198.48€ 189.03€	Buy
Viagra Generic	100mg	120 + 6 Pills	149.50€ 142.38€	Buy

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.

5.5 Hearing Loss

This may be a sign of non-arteritic anterior ischemic optic neuropathy (NAION). If you’ve already had NAION or have crowded optic disc, you may have a higher risk for NAION and vision changes with this drug. 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).

Use In Specific Populations

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. If you have sildenafil otc 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. If your symptoms are severe, call 911 or go to the nearest emergency room right away. 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. 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.

Usual Adult Dose for Pulmonary Hypertension

Taking it again could be fatal (cause death). The use of drinks that contain alcohol raises your risk for low blood pressure from sildenafil. If you drink alcohol, talk with your doctor. You may need to have your blood pressure monitored while you take this drug. For people with heart problems: This drug can lower your blood pressure.

Is 20 or 25mg Sildenafil Enough for ED?

If you’ve had certain heart problems in the last 6 months, ask your doctor whether this drug is safe for you. These problems include a heart attack, stroke, or life threatening heart rhythm problem. Also talk with your doctor if you have a low or high resting blood pressure, or a history of heart failure or coronary artery disease. For people with pulmonary veno-occlusive disease (PVOD): Taking this drug may worsen your heart function. For people with eye problems: This drug may cause sudden loss of vision in one or both eyes. You can take this drug with or without food. 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.

Before taking this medicine

Talk with your doctor if you’re pregnant or planning to become pregnant. It appears unlikely that this drug will harm a pregnancy. 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.

Interactions that increase your risk for side effects

Talk with your doctor if you breastfeed your child. You may need to decide whether to stop breastfeeding or stop taking this medication. 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. Take it at the same time every day. For ED: You can take this drug at any time of day.

Drug Class	Interaction Effect	Recommendation
Nitrates	Severe hypotension	Avoid combination
Alpha-blockers	Additive blood pressure lowering effect	Use with caution
CYP3A4 inhibitors (e.g., ketoconazole)	Increased sildenafil levels	Dose adjustment may be necessary
Antihypertensives	Enhanced blood pressure reduction	Monitor blood pressure
Grapefruit juice	Increased plasma concentration	Avoid during treatment

For PAH: Take this drug three times per day about 4–6 hours apart. 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. You should not need a new prescription for this medication to be refilled. Your doctor will write the number of refills authorized on your prescription. When sildenafil 50 mg india flying, never put it into a checked bag.

Patient Group	Recommended Dose	Frequency of Use	Notes
First-time users	20 mg	Once per day	Take 30-60 min before activity
Experienced users	May increase to 50 mg	As needed	Under medical supervision
Elderly patients	20 mg or lower	As needed	Start with lowest dose
Patients on other medications	Consult doctor	Varies	Adjust dose accordingly

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. 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 helps facilitate natural arousal, not cause an instant erection.
• It is important to hydrate well when taking sildenafil.
• The medication can interact with certain herbal supplements.
• Avoid sharing medication with others due to potential health risks.
• Regular check-ups can help monitor the effects of sildenafil on health.

Sildenafil under the brand name Revatio is often prescribed to help adults with PAH get more exercise by treating their condition.

INFORMATION ABOUT SILDENAFIL

This raises your risk for side effects. For children: This drug isn’t recommended in children younger than 18 years. 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.

Some side effects can be serious. If you experience any of the following symptoms, call your doctor immediately:

It can be taken 30 minutes to 4 hours before sexual activity. Maximum dosage: 100 mg once per day. 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. 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.

Country	Prescription Requirement	Over-the-Counter Availability	Regulatory Body
USA	Yes	No	FDA
UK	Yes	No	MHRA
Canada	Yes	No	Health Canada
Australia	Yes	No	TGA
India	Yes (in some states)	Some brands available OTC	CDSCO

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.

• The future of sildenafil includes research into new therapeutic areas.
• Investigations are ongoing for its use in heart failure with preserved ejection fraction.
• Studies examine its potential benefits in Alzheimer's disease and vascular dementia.
• Its application in jet lag and sleep cycle disorders is being explored.
• Research continues for its use in various forms of female sexual dysfunction.
• Novel delivery systems, like microneedle patches, are in preclinical development.
• Combination therapies with other agents for enhanced effect are being tested.
• The search for more selective PDE5 inhibitors with fewer side effects continues.
• Genetic factors influencing drug response are an area of pharmacogenomic research.
• Sildenafil remains a valuable tool for basic research in vascular biology.
• Its story is a continuing one of scientific discovery and application.

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. However, Viagra is marketed and prescribed strictly for erectile dysfunction, while generic sildenafil can be prescribed for PAH as well. 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. You should always consult your doctor or other healthcare professional before taking any medication. 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.