Plants - Drugs Mind - Spirit Freedom - Law Arts - Culture Library  
Review Erowid at
Help us be a 2020 "Top Rated Nonprofit", and spread accurate info
about psychoactive drugs, health, culture, & policies.
("Share Your Story" link. Needs quick account creation but doesn't verify contact info)
Sildenafil (Viagra)
by Erowid
Caution :   Reactions and experiences may vary dramatically from person to person. [see below]
  • Increased erectile capacity in males
  • Increased sexual drive/interest in males and some females
  • Reduced blood pressure
  • Flushing, red-face
  • Increased stomach acidity, acid-reflux
  • Disappointment that the drug did not make sex a lot better
  • Increase in hypo-tensive incidents (low blood pressure)
  • Dizziness, fainting on standing up (another hypotensive effect)
  • Headaches, likely related to reduced blood pressure
  • Dangerously-long duration erections (treated with vasoconstrictors and cold water applied directly to penis)
  • Loss of vision ("NAOIN") in rare cases
  • Severe hypotension from taking other blood-pressure-reducing drugs
The primary effects of sildenafil (Viagra) are to increase erectile capacity in male humans and decreases to systemic blood pressure.
Erowid's effects information is a summary of data gathered from users, research, and other resources. This information is intended to describe the range of effects people report experiencing. Effects may vary dramatically from one person to another or one experience to another based on a variety of factors such as body chemistry, age, gender, physical health, dose, form of material, etc.