WARNINGS AND PRECAUTIONS

And like Superman around kryptonite, many negative effects you might experience from sildenafil can be dose-dependent.

2.1 Recommended Dosage in Adults

Since ED can vary in severity, there’s no one-size-fits-all dose of sildenafil for erectile dysfunction. If you have mild to moderate ED, you may notice major improvements in sexual performance from a relatively low dosage of sildenafil. On the other hand, if you have severe ED or erectile dysfunction caused by a medical condition that limits blood flow to your penis, you might need a higher dosage. While a higher dose of sildenafil may be most effective, taking too much sildenafil can also elevate your risk of side effects, like headache, nausea, or blurred vision. The sildenafil daily dosage for adults typically starts at 50mg, usually taken roughly one hour before sexual activity — and no more than one dose per day.

Patient resources

This can be adjusted to 25mg or 100mg based on the severity of your ED and your response to the medication. Some versions of sildenafil come in 20mg doses — these film-coated tablets are the generic version of a medication called Revatio®. This drug was originally developed to treat pulmonary hypertension, but generic Revatio is sometimes used off-label to treat ED. Using multiple 20mg tablets, your prescribed dose of sildenafil for ED could be 40mg, 60mg, or 80mg. Here’s what you can typically expect from a dosage of sildenafil. Luckily, most potential adverse effects of sildenafil are mild and resolve on their own over time.

As mentioned briefly above, clinical studies show that the risk of side effects from sildenafil increases with dosage.

For instance, headaches (the most common side effect of sildenafil) were reported by 16 percent of people at a dosage of 25mg, 21 percent at a dosage of 50mg, and 28 percent at a dosage of 100mg in clinical trials. Other side effects, such as flushing, indigestion, and nasal congestion, also occurred at a higher rate as the dosage of sildenafil increased.

• Regulatory status of sildenafil varies by country but generally requires a prescription.
• In the UK, it is a Prescription Only Medicine (POM) but can be prescribed by pharmacists.
• In some countries, it may be available in limited quantities without a prescription.
• The FDA requires a Risk Evaluation and Mitigation Strategy (REMS) for Revatio.
• The REMS is designed to inform healthcare providers about the serious risks.
• This includes the risk of use with nitrates and the potential for hearing loss.
• The medication is subject to controlled substance regulations in some regions.
• Traveling with prescription medication requires carrying it in original packaging.
• It is advisable to have a copy of the prescription or a doctor's note when traveling.
• Laws regarding the importation of prescription drugs are strict and vary.
• Always check the legal status of the medication in your destination country.

Sildenafil can also cause more serious side effects like: Seriously, death — so make sure you use this medication as directed, and seek emergency medical help if you experience any of the side effects above. Priapism — an erection lasting four hours or longer — sounds great until you realize you can permanently damage the tissue in your penis if you don’t do something about it ASAP.

What should I do if I forget a dose?

Active ingredient: sildenafil citrateInactive ingredients: dextrose and water for injection. Contains no ingredients made from gluten-containing grain (eg, wheat, barley, or rye). Revatio is distributed by Pfizer Labs, Division of Pfizer Inc., NY, NY 10017. Viagra is distributed by Pfizer Labs, Division of Pfizer Inc., NY, NY 10017. It is distributed by: IBSA Pharma Inc, Parsippany, NJ 07054 USA.

5.1 Cardiovascular

Cialis vs Viagra - What's the difference between them? Do you know these 11 amazing facts about Viagra? Is generic Viagra available in the U.S.? Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances. Spontaneous sex for less than $2/day Thinking of increasing your sildenafil dosage on your own for even longer, harder erections? Like most medications, sildenafil can cause interactions when used with other prescription drugs, alcohol, and certain other substances.

Sildenafil can potentially cause dangerous drug interactions when combined with medications for heart disease or high blood pressure.

8.7 Patients with Renal Impairment

Here are the most important facts about sildenafil: Sildenafil (the active ingredient in brand-name Viagra) is approved by the FDA for erectile dysfunction and pulmonary arterial hypertension (PAH), a form of high blood pressure in the lungs. Sildenafil (the active ingredient in brand-name Viagra) is approved by the FDA for erectile dysfunction and pulmonary arterial hypertension (PAH), a form of high blood pressure in the lungs. Sildenafil is in a class of medications called phosphodiesterase type 5 (PDE5) inhibitors, or PDE5 inhibitors. Sildenafil works by blocking the actions of cGMP-specific phosphodiesterase type 5 — an enzyme that controls blood flow to certain body tissues. PDE5 regulates blood flow to your penis.

Factors That Influence the Right Dosage for You

By blocking its effects, sildenafil improves blood supply to erectile tissue and makes it easier to get — and stay — hard. Sildenafil comes in oral tablet form and is available in a range of dosages, from 20mg up to 100mg (milligrams). It usually takes about a half-hour for sildenafil to start working. Most men who use sildenafil to treat ED take the medication 30 minutes to one hour before sexual activity. It’s recommended to avoid high-fat meals while taking this drug, which can affect its efficacy. Nitrates, alpha-blockers, and calcium channel blockers.

• Special populations require careful consideration before prescribing.
• In elderly patients (65+), clearance may be reduced; start with a lower dose.
• No dose adjustment is typically needed for patients with mild renal impairment.
• For moderate renal impairment (CrCl 30-80 mL/min), caution is advised.
• In severe renal impairment (CrCl <30 mL/min), a 25mg dose is often recommended.
• For hepatic impairment (Child-Pugh A and B), a 25mg starting dose is advised.
• Sildenafil is not recommended for patients with severe hepatic impairment.
• Safety and efficacy in pediatric patients for ED have not been established.
• Revatio is approved for pediatric PAH patients aged 1 year and older.
• The dose for pediatric PAH is based on body weight and must be carefully calculated.
• Use during pregnancy is only for PAH and requires a careful risk/benefit analysis.

When sildenafil is used with these or other medications for hypertension or cardiovascular disease, it can contribute to a sudden decrease in blood pressure that may, in some cases, be life-threatening. Some party drugs — such as poppers — contain ingredients like nitrites, which can cause potentially dangerous effects when used with PDE5 inhibitors. Sildenafil citrate and other PDE5 inhibitors like Cialis® (tadalafil) and Levitra® (vardenafil) all have negative interactions with medications like itraconazole, ketoconazole, and, oddly enough, grapefruit juice. These things affect the CYP3A4 enzyme and may contribute to higher levels of sildenafil in the bloodstream, potentially increasing the risk of side effects. Make sure to tell your healthcare provider if you’re on any of these — a bad mixture could lead to low blood pressure that may actually be fatal.

Other Comments

Your journey with sildenafil or Viagra will probably begin with a 50mg dose. Since most men with ED notice improvements in their erections and sexual performance from a 50mg dosage, healthcare providers usually start there and either increase or decrease the dosage accordingly. In a randomized trial, men’s erections lasted for 19.5 minutes on average after using sildenafil, compared to zero minutes for men who received a non-therapeutic placebo. Your healthcare provider may prescribe higher doses of sildenafil if you have severe or persistent ED that doesn’t get better with the use of sildenafil at a lower dose. The minimum dosage of sildenafil FDA-approved to treat erectile dysfunction is 25mg.

What Are the Available Sildenafil Dosages?

You might be prescribed sildenafil at this dosage if you have mild ED or any health issues that increase your risk of side effects from sildenafil. As mentioned earlier, some forms of sildenafil come as a 20mg tablet. These are often generic sildenafil chewable tablets versions of Revatio. Let’s get something straight, fellas: The dose of sildenafil you use isn’t a measure of manhood — and a higher dosage won’t necessarily produce better effects. There’s no “ideal” dosage of sildenafil for everyone. If you take them together by accident, seek medical attention right away.

• Sildenafil does not cause spontaneous erections; stimulation is still required.
• Avoid using it if you have a history of stroke or severe heart disease.
• Consult a doctor especially if you have kidney or liver problems.
• The medication should not be used with certain antidepressants or antibiotics.
• Excessive dosing can lead to serious cardiovascular events.

It’s also important to inform your provider about any underlying health issues or if you’ve previously had heart problems, such as a heart attack, irregular heartbeat, angina (chest pain), or narrowing of your aortic valve.

5.7 Priapism

Sorry to be a killjoy, but you should never override your healthcare provider’s guidance. Sildenafil, the active ingredient in Viagra®, is an FDA-approved medication for treating erectile dysfunction (ED). Though it’s a great drug, taking too much or too little can either render it ineffective or set you up for some uncomfortable side effects. If you’re Googling sildenafil dosages, it might be time for a refresher on how this drug works and how providers determine the correct dose for patients. While sildenafil has a well-earned reputation for helping guys with ED, it isn’t a cure for erectile dysfunction — and it doesn’t supercharge your libido.

Oral Administration

What the drug does do is make it easier to get and maintain an erection when you’re already sexually aroused. But here’s the thing — if you don’t get the dosage right, the medication probably won’t work the way it should. Below, we’ll explain how to find the right sildenafil dosage for ED, what you should know about sildenafil dosage timing, and why you should never exceed the maximum dose of sildenafil in 24 hours. Like many other medications for ED, sildenafil helps you get and maintain erections by increasing blood flow to the tissue inside your penis. But sildenafil dosage isn’t based on penis size, SAT scores, your tax bracket, or how badly you want to elevate your sex life. Also, tell your provider if you have sickle cell anemia, leukemia, a sexually transmitted infection (STI), or — just saying this to be safe — are breastfeeding.

• 20mg sildenafil is a standard starting dose for many men.
• Its safety profile is well-established when used responsibly.
• The drug should be taken at least 30 minutes before sexual activity.
• Use caution if you experience dizziness or sudden vision loss.
• Always follow medical advice when using sildenafil for ED.

Our guide to sildenafil interactions goes into greater detail about the risks of using this drug with other medications, as well as steps you can take to lower your interaction risk.

Usual Adult Dose for Pulmonary Hypertension

That said, 50mg has shown proven benefits for most men in clinical trials. For example, a series of two studies looked at the effects of 50mg sildenafil in men with erectile dysfunction. After taking this dosage, 71 percent of participants got an erection in 30 minutes or less. After 45 minutes, 82 percent achieved an erection. You may not want to take 50mg if you experience significant side effects like vision changes, nausea, or painful erections. Erectile dysfunction is a common problem affecting an estimated 30 million adult men in the United States alone. If you’re one of them, using medication like sildenafil can help you more easily maintain an erection and enjoy a fulfilling, satisfying sex life.

What to avoid

If you notice side effects from sildenafil at a dosage of 50mg or 100mg, your healthcare provider may suggest going down to 25mg. If you only have mild ED, you may find that a low dosage is more than enough to improve your symptoms and help you have sex without worrying about getting or maintaining an erection. But if you have severe or persistent ED, your healthcare provider might prescribe sildenafil at a higher dosage. Find the right dosage for you, and take what you need — nothing more, nothing less. For most people, sildenafil is safe and effective, but that doesn’t mean it’s perfect.