What is the maximum dose of Viagra (sildenafil)?

The highest available Viagra dosage is 100 mg, but that does not mean 100 mg is suitable for everyone. When it comes to medication, more is not always better (or more effective). That is true of Viagra (sildenafil), too.

Like any medication, Viagra comes with potential risks, side effects, and contraindications. Depending on age, health status, lifestyle, and other factors, a healthcare provider will help determine a Viagra dosage that is safe and effective.

The maximum dose of Viagra (or its generic, sildenafil) is 100 mg. This dose is prescribed to people who do not get relief from their erectile dysfunction (ED) symptoms with a lower Viagra dose of 25 mg or 50 mg.

The maximum dose is typically safe to take, as long as a healthcare provider prescribes it. If prescribed a lower dose, taking multiple pills to reach a higher dose is not recommended unless a healthcare provider advises otherwise.

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A healthcare provider will prescribe the dose of Viagra that is best for each person. Their decision depends on many factors, including:

• Age

• Heart health

• Overall health

• Additional medical conditions: Health conditions such as liver or kidney disease may affect how the body processes Viagra, and a lower dose may be needed. People taking medications such as nitrates for heart conditions should not take Viagra.

• Reaction to the first dose: Some people need a higher or lower dosage of Viagra for the desired effect. Depending on medical history, symptoms, and preferences, a healthcare provider may start at the lowest dose (25 mg of Viagra or 20 mg of sildenafil) to reduce the risk of side effects. They may also recommend trying the medication alone before using it with a partner, or giving it a few tries to see how it affects the body.

• How often the medication is used: Some people use Viagra every day; others use it a few times a week or less frequently. The frequency of use may affect the dosage a healthcare provider prescribes. A provider might also suggest a different medication, such as daily Cialis (tadalafil).

Regardless of the prescribed Viagra dosage, taking more than one dose in a 24-hour period is not recommended.

The US Food and Drug Administration (FDA) recommended dose for most people is 50 mg. However, depending on overall health and other medications, a healthcare provider might suggest starting at a lower dose. 

If starting with 50 mg, a healthcare provider can determine whether a lower or higher dose is appropriate. If side effects are bothersome, they might prescribe 25 mg. If the dose is not effective for treating ED, they may prescribe 100 mg.

More does not necessarily mean better. Even if the first dose is not quite right, a healthcare provider can help find the appropriate dose.

Brand-name Viagra comes in three dosages: 25 mg, 50 mg, and 100 mg. The 50 mg dose is most commonly prescribed.

Sildenafil is the active ingredient in Viagra, and the generic version of Viagra is often referred to simply as sildenafil. Sildenafil may be prescribed in the same dosages as brand name Viagra; it can also be prescribed as a 20 mg pill in 20 mg, 40 mg, 60 mg, 80 mg, and 100 mg doses.

The 100 mg dose is the maximum dosage available for Viagra and sildenafil, and a healthcare provider is unlikely to prescribe more than that.

If Viagra is not working as it should — and all of a provider's recommendations have been followed — they may prescribe a higher dose or switch to a different medication.

Viagra's effectiveness may depend on:

• The dosage you're originally prescribed. It may or may not have been the right amount for you.

• Whether it is taken with a fatty meal. Doing so may slow Viagra's absorption by the body, resulting in a delayed erection or one that is less firm than desired.

• Whether Viagra has been given the appropriate amount of time to work. It is generally recommended to take it approximately one hour before sexual activity.

• Psychological factors, such as performance anxiety.

The most common side effects of Viagra include:

• Dizziness

• Headache

• Flushing

• Upset stomach or indigestion 

• Increased sensitivity to light

• Blurred vision 

• "Blue-tinted" vision

• A stuffy or runny nose

• Insomnia

• Rash

• Muscle pain 

Less common side effects of Viagra include: 

• Priapism (a painful erection lasting more than four hours)

• Sudden vision loss

• Sudden hearing loss or ringing in the ears

• Fainting

• Seizures

• Chest pain

If you experience any of these more serious symptoms, seek immediate medical attention.

The dose of ED medication should not be increased, doubled, or changed without the guidance of a healthcare provider. If Viagra is not producing the desired results or side effects are present, a healthcare provider can help. Viagra is not right for everyone, and a provider can help develop a safe and effective ED treatment plan.

Viagra isn't right for everyone, and your provider will help you develop a safe and effective ED treatment plan. 

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Viagra is a prescription ED medication with a maximum recommended dose of 100 mg a day.

• The most typical Viagra dose is 50 mg, but for people who do not see relief from 50 mg, 100 mg may provide better results.

• Factors that contribute to the prescribed Viagra dose include age, overall health, heart health, response to the first few doses, and intended frequency of use.

• A higher dose does not always mean better or more effective results, and Viagra should be taken exactly as a healthcare provider prescribes.