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Cialis and Levitra also linked to NAION

Cialis is manufactured and marketed by Eli Lilly. In May 2005, Eli Lilly changed the adverse warnings section of Cialis' label to confirm to FDA requirements because Cialis was linked to 4 cases of nonarteritic ischemic optic neuropathy (NAION), a "stroke of the eye" that occurs when blood flow is restricted to the optic nerve, causing partial or total loss of vision. While some vision loss has been mild, NAION is a permanent, irreversible condition. Levitra was linked to one additional case of NAION.

Those most at risk for NAION while taking erectile dysfunction drugs are patients older than 50 who also have the following conditions:

  • Diabetes
  • High blood pressure
  • Heart disease
  • High cholesterol

Learn more about NAION

NAION results from a sudden loss of blood flow to the optic nerve at the back of the eye. Usually linked to cataracts or macular degeneration, NAION has occurred in 43 cases of men taking Viagra, Cialis or Levitra for ED. In all cases it has resulted in permanent vision loss.