ED Treatment Guide: What Is the Right Dosage? | MediSuite

ED Treatment Guide: What Is the Right Dosage?

Jul 14, 2023

Finding the right treatment for erectile dysfunction (ED) starts with selecting a medication. You’ve probably heard of the two most popular brand-name options: Cialis and Viagra. These medications are called phosphodiesterase-5 (PDE5) inhibitors, which increase blood flow to and reduce blood flow away from the penis. After medication, the next important factor is what dose will most effectively treat your symptoms. ED treatment is not one-size-fits-all, which is why both medications offer multiple dosage options.

Dosages for Sildenafil (Generic Viagra)

Sildenafil is both the active ingredient and generic version of Viagra. Despite the difference in name, Sildenafil and Viagra work the same way and have the same effect on ED. Unlike Cialis, Sildenafil must be taken at least one hour before sex, and its effects can last up to 6 hours.1 Sildenafil should also be taken on an empty stomach to work as quickly as possible.

There are three doses available for Sildenafil:2

  • 20 mg – The minimum dosage; used to treat mild ED in older men or if there is a risk of complications from certain health issues
  • 50 mg – The standard dosage; many men start with this dose and see significant improvements in their ED
  • 100 mg – The maximum dosage; prescribed for men with more severe ED that cannot be treated with lower doses
If you are under the age of 65 and have no risk of drug interactions or health complications, your doctor will likely recommend that you start with 50 mg.2 Sildenafil can be taken daily or as needed, but be sure to not take more than one dose a day. This can lead to a prolonged (longer than four hours) erection, headaches, low blood pressure, and other potentially dangerous side effects. Sildenafil is very effective, but it might not work the first time. If your initial dose fails to help you achieve and sustain an erection after several tries, your doctor may recommend a higher dose.

Dosages for Tadalafil (Generic Cialis)

Tadalafil is the generic form of Cialis, and they both use the same active ingredient to treat ED. Tadalafil can be taken as soon as 30 minutes before sex, and it can stay effective for up to 36 hours.3 Tadalafil is also different from Sildenafil (Viagra) in that it can be taken either before or after eating — having food in your stomach won’t delay its effects.

The three approved doses of Tadalafil are:3

  • 5 mg – The minimum dosage; your doctor may prescribe this if you want a daily dose of Tadalafil or if you have kidney or liver problems
  • 10 mg – The standard dosage; this tablet is designed for occasional use as needed before sex
  • 20 mg – The maximum dosage; prescribed when lower doses are ineffective and there’s no risk of harmful drug interactions or health complications
Whether you take Tadalafil regularly or only as needed, it’s important to only take your prescribed dose each day. As with Sildenafil, exceeding your daily dose can lead to painful, long-lasting erections and problems with blood pressure regulation. Tadalafil works quickly, but expect to wait a few days before it takes full effect. If you have performance anxiety, you may need additional time to adjust to your new routine before seeing an improvement.

Which Dosage Is Right for You?

If you’re interested in trying Sildenafil or Tadalafil, talk to your doctor about which medication is best for you. After determining the right dosage, the next step is filling your prescription. With MediSuite, you can skip the pharmacy lines and get low-cost ED medication shipped discreetly to your door. Either start an online visit or call us at 919-200-6952 or 1-800-601-0691 to learn more about finding the right dosage and how you can get your medication at the lowest price available.



1. Viagra Dosage. (2021, July 9). Drugs.com. https://www.drugs.com/dosage/viagra.html 
2. sildenafil (Rx). (n.d.). Medscape. Retrieved May 9, 2023, from https://reference.medscape.com/drug/revatio-viagra-sildenafil-342834 
3. Cialis Dosage. (2022, April 1). Drugs.com. https://www.drugs.com/dosage/cialis.html