Rare Side Effects of Tadalafil
During clinical studies, there were a number of other side effects that occurred in less than 2 percent of people while they were taking
tadalafil. It is difficult to tell whether these side effects occurred because of tadalafil or something else.
Some of these possible side effects include but are not limited to:
- Insomnia
- Unexplained rash
- Angina
- Migraines
- High blood pressure (hypertension)
- Dry mouth
- A spinning sensation (vertigo)
- Blurred vision
- A sudden decrease in or loss of hearing
- Other vision problems, such as seeing a blue tinge to objects or difficulty telling the difference between blue and green
- Prolonged erection lasting longer than four hours
- Painful erection lasting more than six hours (priapism).
In rare cases, serious problems can occur in the heart, brain, or blood vessels. These include:
In these cases, most of the people already 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 tadalafil, the person's existing risk factors, sexual activity, or a combination of these things.
In people taking PDE5 inhibitors, including tadalafil, 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. If you notice any unexplained changes in your vision while taking tadalafil, report them to your doctor immediately
(see Cialis and Blindness).
There have been reports of transient global amnesia possibly due to tadalafil. Transient global amnesia is a temporary loss of short-term memory. People may not remember recent events and have an impaired ability to form new memories. It usually lasts 24 hours or less and typically has no long-term consequences.
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