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QUESTION & ANSWER
Q: How long does it take for Cialis to peak?

By  Sarah Lewis, PharmD
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A:

The Cialis dosage for ED (erectile dysfunction) can be once daily every day or only as needed. Cialis will reach peak concentrations in about two hours. If you use Cialis as needed, make sure it has enough time to work. Take Cialis at least two hours before sex. You can expect the effects to last up to 36 hours.

More About Cialis

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Erectile Dysfunction

About The Author

Sarah Lewis, PharmD Healthgrades Medical Writer
Sarah Lewis, PharmD
Sarah Lewis is a pharmacist and a medical writer with over 25 years of experience in various areas of pharmacy practice. Sarah holds a Bachelor of Science in Pharmacy degree from West Virginia University and a Doctor of Pharmacy degree from Massachusetts College of Pharmacy. She completed Pharmacy Practice Residency training at the University of Pittsburgh/VA Pittsburgh Healthcare System. 
Last Updated: February 19, 2020
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THIS TOOL DOES NOT PROVIDE MEDICAL ADVICE. It is intended for informational purposes only. It is not a substitute for professional medical advice, diagnosis or treatment. Never ignore professional medical advice in seeking treatment because of something you have read on the site. If you think you may have a medical emergency, immediately call your doctor or dial 911.
  1. Cialis Prescribing Information. Drugs.com. https://www.drugs.com/pro/cialis.html 
  2. Tadalafil (Oral Route). Mayo Foundation for Medical Education and Research. https://www.mayoclinic.org/drugs-supplements/tadalafil-oral-route/description/drg-20067204