CIALIS is a prescription medicine taken by mouth for the treatment of erectile dysfunction (ED) in men.

CIALIS does not:

• cure ED
• increase a man’s sexual desire
• protect a man or his partner from sexually transmitted diseases, including HIV. Speak to your healthcare provider about ways to guard against sexually transmitted diseases
• serve as a male form of birth control

CIALIS is only for men over the age of 18 who have ED, including men with diabetes or who have undergone prostatectomy. CIALIS is not for women or children. CIALIS must be used only under a healthcare provider’s care.

Before taking CIALIS,

Tell your healthcare provider about all your medical problems, including if you:

• are allergic to CIALIS or any of its ingredients. See the end of this section for a complete list of ingredients in CIALIS.
• have heart problems such as angina, heart failure, irregular heartbeats, or have had a heart attack. Ask your healthcare provider if it is safe for you to have sexual activity. You should not take CIALIS if your healthcare provider has told you not to have sexual activity because of your health problems
• have low blood pressure or have high blood pressure that is not controlled
• have had a stroke
• have liver problems
• have kidney problems or require dialysis
• have retinitis pigmentosa, a rare genetic (runs in families) eye disease
• have ever had severe vision loss, including a condition called NAION
• have stomach ulcers
• have a bleeding problem
• have a deformed penis shape or Peyronie’s disease
• have had an erection that lasted more than 4 hours
• have blood cell problems such as sickle cell anemia, multiple myeloma, or leukemia

Side effects

The most common side effects with CIALIS are: headache, indigestion, back pain, muscle aches, flushing, and stuffy or runny nose. These side effects usually go away after a few hours. Men who get back pain and muscle aches usually get it 12 to 24 hours after taking CIALIS. Back pain and muscle aches usually go away within 2 days. Call your healthcare provider if you get any side effect that bothers you or one that does not go away.

Uncommon 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.

Color vision changes, such as seeing a blue tinge (shade) to objects or having difficulty telling the difference between the colors blue and green.

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. It is not possible to determine whether these events are related directly to these medicines, to other factors such as high blood pressure or diabetes, or to a combination of these. If you experience sudden decrease or loss of vision, stop taking PDE5 inhibitors, including CIALIS, and call a healthcare provider right away.

These are not all the possible side effects of CIALIS. For more information, ask your healthcare provider or pharmacist.

Do not let anyone else take your medication.

Store CIALIS at room temperature between 59° and 86°F (15° and 30°C).

Keep CIALIS and all medicines out of the reach of children.