Safety

Most common side effects usually go away after a few hours. Men who experience back pain or muscle aches typically do so 12 to 24 hours after taking CIALIS, but both usually go away within two days. You should always call your doctor if you get a side effect that continues to bother you or won't go away.

In clinical trials in which 36-hour CIALIS and Once a day CIALIS were compared with placebo (sugar pill) the following were the most common side effects reported by patients:

Common Adverse Events Common Adverse Events

Uncommon but serious side effects include:

An erection that won't go away (priapism). If you get an erection that lasts more than 4 hours, get medical help right away. Priapism must be treated as soon as

possible or lasting damage can happen to your penis, including the inability to have erections.

In rare instances, men taking PDE5 inhibitors (oral erectile dysfunction medicines, including CIALIS) reported a sudden decrease or loss of vision in one or both

eyes. If you experience a sudden decrease or loss of vision, stop taking CIALIS and call a healthcare provider right away.
Sudden loss or decrease in hearing, sometimes with ringing in the ears and dizziness, has been rarely reported in people taking PDE5 inhibitors, including CIALIS.

It is not possible to determine whether these events are related directly to the PDE5 inhibitors, to other diseases or medications, to other factors, or to a combination of factors. If you experience these symptoms, stop taking CIALIS and contact a healthcare provider right away.

See full Prescribing Information for additional Important Safety Information.
See full Prescribing Information for additional Important Safety Information.


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1Porst H et al. Eur Urol 2006;50:351-9.
2Rajfer J et al. Int J Impot Res 2007;19:95-103.
3Donatucci et al. Curr Med Res Opin 2008; 24:3383-92.
4Carson CC et al. BJU Int 2004;93:1276-81.


Last Update: 6 Oct 2015

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