Last Updated on July 28, 2020 by Dr. Philip Schein MD

Erectile dysfunction has two opposite sides related to proper treatment. On the one hand, you can easily choose and buy the right drug. On the other hand, a lack of knowledge about the medicine can adversely affect your health. The correct choice of Viagra dosage is an important component of effective and safe therapy.

Viagra Dosage Guide

Viagra comes in three traditional tablet strengths (25, 50, and 100mg). They differ exclusively in the dosage of the active substance. A complex chemical compound sildenafil citrate is at the heart of Viagra. It is classified as a PDE5 inhibitor, which enhances the relaxing effect of nitric oxide on the smooth muscles of the corpora cavernosa and increases blood flow in the penis.

Viagra dosage is simple for realization. Tablets are labeled by the amount of active substance in them. There are options with VGR 100, VGR 50 and VGR 50 markings.

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In terms of chemistry, the dosage of the active substance does not alter the nature of the effect in male persons. Notwithstanding that 25-mg pill works equally to a 100-mg one, there are dissimilarities between the different dosage options.

Read our complete guidance: Viagra Dosage: Which One Should You Take?

Viagra 25 mg

This is the most modest dose that can give the desired result. Doctors usually recommend this quantity to ED sufferers who take specific medications with interaction potential. These can be high BP drugs, HIV therapy remedies (Lopinavir/ritonavir), any other drugs that can increase the concentration of sildenafil.

The minimum concentration of the drug means the slightest risks of side effects. Concerns and fears regarding negative consequences of taking Viagra or an unfortunate experience with higher dosages may be the reason to try this dosage.

Viagra 50 mg

This is a classic variant to improve an erection. Men most often learn about the properties of Viagra thanks to this option. Usually, healthcare experts and scientists recommend 50 mg, because this is an important benchmark for subsequent adjustment of treatment. According to a study published in Clinical Interventions in Aging, 50mg is adapted according to efficacy and tolerability.

In case of unsuccessful therapy, you can switch to more potent or more mild treatment.

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Viagra 100 mg

This is the maximum amount of sildenafil that is available for common therapeutic consumption. Erectile dysfunction symptoms are nonidentical in different men. Some patients suffer from complete erectional failure, while others have weak or short-term erection. In severe occasions, only peak dosage can provide a desired effect. Doctors do not recommend starting therapy with 100 mg. This is an acceptable option, but only for those who don’t prone to side effects, don’t have serios cardiac disorders and do not feel improvement from lower sildenafil amounts.

Viagra Overdose

All dosages are designed for a single use before sexual intercourse. If the minimum dosage doesn’t provide improvements, dosage increment is allowable not earlier than next day. If 100mg is ineffective too, probably you need an alternative treatment. Studies have shown that administration of 200 mg doesn’t affect Viagra efficiency. Such experiments are associated with incremented risk of various side effects (dizziness, headache, visual impairment).

Studies focused on overdose have been carried out with the use of up to 800 mg of sildenafil taken in one fell swoop. The results are comparable to smaller overdoses: no effect improvement effect compared to 100mg and a several-fold increase in side effects’ incidence.

Obviously, the manufacturer released 25, 50 and 100 mg options not by chance. These concentrations ensure acceptable balance between a positive effect and probable health risks.

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How to Choose the Best Viagra Dosage?

This question can be properly answered by a doctor only. This is the most reliable way to make a correct choice. Nonetheless, there are several criteria allowing to realize a direction to move forward and a figure on the pill that will reignite the fire and ardor in your bedroom.

Choosing the right dose depends on your previous experience with ED therapy. If you don’t take other RX medicines and don’t have obvious contraindications, initiating the therapy with 50 mg is a reasonable option. Moreover, this dose is suitable for most men.

Popularity of this dose is also associated with the fact that some men who consider 25mg poorly effective may substitute it with 50mg.  In addition, takers of 100mg who have been distressed by adverse events may diminish a dosage.

25 mg is the choice of those who felt some discomfort from fifty milligrams, but could get a strong erection and high-quality sexual intercourse. However, all side effects are individual, so a dosage cannot utterly solve all problems.

There is a large category of men who perfectly tolerate all Viagra components, but for some reason do not get a stable result. If you’ve faced troubles with effectiveness, you may try 100 mg. Age and weight play a secondary role in choosing a dosage. These factors do not directly affect the effectiveness. Some age-related health conditions can affect the choice of treatment. However, this is associated not with the age per se, but with concomitant diseases and peculiarities of their treatment. The same goes for bodyweight. If an overweight man likes to eat a large amount of fatty foods before intercourse (supplementing it with alcohol), this can offset the effect of sildenafil. In this case, the problem occurs due to violation of recommendations for taking Viagra, not due to incorrectly selected dose.

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I’m an Oncologist and Hematology Specialist primary located in Bryn Mawr, Pennsylvania. I have over 55 years of experience in the medical field and more than 20 years of practice. I’m skilled at the treatment & diagnosis of a large array of ailments & diseases in adults.

Board certifications

  • American Board of Internal Medicine Certification in Internal Medicine
  • American Board of Hematology Certification in Hematology
  • American Board of Medical Oncology Certification in Medical Oncology