Medicines for Erection Problems: Reactions With Nitrate
Phosphodiesterase-5 inhibitors, such as sildenafil (Viagra), tadalafil (Cialis), and vardenafil (Levitra), have revolutionized the treatment of erection problems (erectile dysfunction). But they can cause life-threatening side effects for anyone who also takes nitroglycerin or another medicine containing an organic nitrate. This combination can make your blood pressure fall too low, possibly leading to a stroke, a heart attack, or death. Do not take nitrate-containing medicines up to 24 hours after you take sildenafil (Viagra) or vardenafil (Levitra), or up to 48 hours after you take tadalafil (Cialis).
Medicines that contain organic nitrates include:
Nitrates found in foods are not a danger when taking phosphodiesterase-5 inhibitors.
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