Cialis Side Effects (Cont.)

Rare Cialis Side Effects

During clinical studies, there were a number of other side effects that occurred in less than 2 percent of people while they were taking Cialis. It is difficult to tell whether these side effects occurred because of Cialis or something else.
 
Some of these possible Cialis side effects include but are not limited to:
 
  • Angina
  • High blood pressure (hypertension)
  • Dry mouth
  • Insomnia
  • A spinning sensation (vertigo)
  • Unexplained rash
  • Blurred vision
  • Other vision problems, such as seeing a blue tinge to objects or difficulty telling the difference between blue and green
  • A sudden decrease in or loss of hearing
  • Migraines
  • Prolonged erection lasting longer than four hours
  • Painful erection lasting more than six hours (priapism).
     
In rare cases, there have also been serious problems occurring in the heart, brain, or blood vessels. These include:
 
In these cases, most of the people had cardiovascular risk factors. Also, the side effects occurred during or shortly after sexual activity. For these reasons, it is difficult to tell whether the problems were related to the Cialis, the person's existing risk factors, sexual activity, or a combination of these things.
 
(Click Cialis Precautions and Warnings for more information.)
 
In people taking PDE5 inhibitors, including Cialis, there have been rare cases of a condition called non-arteritic anterior ischemic optic neuropathy (NAION). This condition can lead to sudden loss of vision in one or both eyes (see Cialis and Blindness). If you notice any unexplained changes in your vision while taking Cialis, report them to your healthcare provider immediately.
 
(Cialis Side Effects Continued: Page 3)

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Written by/reviewed by: Kristi Monson, PharmD; Arthur Schoenstadt, MD
Last reviewed by: Kristi Monson, PharmD;