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What Are All of the Viagra (Sildenafil) Dosages?

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Brand name Viagra, and its generic form Sildenafil, both come in three different dosages: 25mg, 50mg, and 100mg tablets.

You may also see Sildenafil in a 20mg tablet dose, or a liquid suspension, either generic or under the brand name Revatio.

But, when Sildenafil is in the 20mg dosage, in a liquid form, or under the brand name Revatio, it is for a lung condition called Pulmonary Hypertension and not for erectile dysfunction.

So, why are some people started on different dosages of Sildenafil, and which dose is the most common?

In this article, we will break down why some people are instructed by their doctors to take lower or higher Sildenafil dosages.

What is the usual Viagra dosage?

The most common starting dose of Viagra, or its generic form Sildenafil, is the 50mg tablet.

Since the side effects of medications can increase when high doses are taken, most doctors tend to start at the middle 50mg dose to try to ensure than the medication will work for the patient, without increasing the risks of any adverse side effects.

Sometimes patients may eventually need to increase to a higher strength to get the same effects. So, by starting at the middle dosage, the higher 100mg dosage is reserved for if it is needed in the future or if the 50mg dose does not work.

100mg Viagra or Sildenafil once daily is the highest approved dosage for erectile dysfunction.

When would the Viagra dosage be lower?

On occasion, the lowest 25mg tablet strength will be prescribed for erectile dysfunction.

Sometimes this lower strength is deemed the most appropriate for a patient due to reasons such as:

  • Avoidance of side effects
  • Age
  • Current heart health
  • Current disease states
  • Other medications being taken
  • How often you plan to use the medication

Certain conditions or medications may make your body take longer to clear medications from your system, so a lower strength may be best to avoid unwanted side effects.

Ultimately, it is best to stay at the lowest dosage that works for you and that you and your doctor agree with.

When would the Viagra dosage be higher?

The higher 100mg dosage of Viagra or Sildenafil is sometimes prescribed due to a patient not responding to a lower dosage immediately, or overtime.

Erectile dysfunction can often worsen with age or with the progression of other disease states, so with time lower dosages of Viagra or Sildenafil may no longer work for you as well and your doctor may increase your dose to the 100mg tablet.

There may be certain cases where your doctor may immediately start you on the 100mg dosage, and that is up to your doctor’s discretion and medical decision after reviewing your medical history and current conditions.

Speak with your doctor before any dosage changes

If you are currently taking Viagra or Sildenafil and you are wondering if you should take a higher or lower dosage than what you are currently prescribed, you must speak with your prescribing physician before making any changes to your regimen.

You should take your medication exactly as prescribed to avoid unwanted side effects or treatment failure.

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