Cialis is a medication used to treat male sexual function problems such as impotence or erectile dysfunction (ED) . It works by increasing blood flow to the penis to help a man get and keep an erection when sexually stimulated. Cialis is also used to treat the symptoms of an enlarged prostate (benign prostatic hyperplasia-BPH) . It helps to relieve symptoms of BPH such as difficulty in beginning the flow of urine, weak stream, and the need to urinate often or urgently (including during the middle of the night) . Tadalafil is the active ingredient in Cialis, and it belongs to a group of medications called phosphodiesterase 5 (PDE5) inhibitors.

Here are some key points to know about Cialis:

• Cialis is available only by prescription and is not available over the counter.
• Cialis comes in different doses, including 2.5 mg, 5 mg, 10 mg, and 20 mg tablets.
• Cialis should be taken orally, either as a low dose daily medication or as a higher-dose “on-demand” medication.
• Cialis does not cure erectile dysfunction or increase sexual desire.
• Cialis does not protect against sexually transmitted diseases such as HIV, hepatitis B, gonorrhea, syphilis.
• Cialis can cause side effects, such as headache, indigestion, back pain, muscle pain, flushing, and stuffy nose.
• Cialis can cause a sudden drop in blood pressure if taken with any nitrate medication.
• Cialis should not be taken by people who are using a type of drug called a guanylate cyclase stimulator.

It is important to talk to a doctor before taking Cialis, especially if you have a heart problem or are taking other medications.