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Udenafil is used to treat erectile dysfunction (inability to achieve erection) in men.

How it works

Udenafil is a phosphodiesterase type 5 (PDE5, an enzyme that normally degrades nitric oxide (NO) in the body). Udenafil acts by blocking the action of PDE5 enzyme, and increasing the blood levels of NO, which in turn increases the inflow of blood in penis, causing erection.

Common side effects

Dizziness, Headache, Indigestion, Nasal congestion, Eye redness, Skin redness, Warm sensation, Visual impairment


Expert advice

  • Discontinue udenafil in the event of sudden loss of vision or hearing or spontaneous ringing in ears or dizziness.
  • Use udenafil with caution if you suffer from structural deformity of the penis as it may cause priapism (painful erection).
  • Take precaution while on  udenafil therapy, if you suffer from low blood pressure or heart diseases (e.g. aortic stenosis, hypertrophic obstructive cardiomyopathy), as it may sometimes cause reduction in blood pressure.
  • Udenafil can cause dizziness and blurred vision. Do not drive or operate any machinery after taking this medicine.

Frequently asked questions


Q. Is udenafil safe?
Udenafil is safe when taken at prescribed dose and duration. Always consult your doctor regarding its use and safety.
Q. How to use Udenafil?
Udenafil should be taken at an initial dose of 100 mg orally approximately 30 minutes to 12 hours before sexual activity.

Content on this page was last updated on 30 September, 2016, by Dr. Varun Gupta (MD Pharmacology)