tadalafil, sold under the brand name Cialis among others, is a medication use to treat erectile dysfunction, benign prostatic hyperplasia, and pulmonary arterial hypertension. It is a tablet taken by mouth. Onset is typically within half an hour and the duration is up to 36 hours.

What does tadalafil do for a man?
it is use to treat men who have erectile dysfunction (also call sexual impotence). it belongs to a group of medicines call phosphodiesterase 5 (PDE5) inhibitors. These medicines prevent an enzyme call phosphodiesterase type-5 from working too quickly.

What are the side effects of using tadalafil?
it may cause side effects. Tell your doctor if any of these symptoms are severe or do not go away:

• headache.
• indigestion or heartburn.
• nausea.
• diarrhea.
• flushing.
• pain in the stomach, back, muscles, arms, or legs.
• cough.

How long does tadalafil take to work?
It usually takes 30 to 60 minutes for tadalafil to work for erectile dysfunction. You can take it once a day, at least 30 minutes before you want to have sex. Taking medicine on its own is not enough to cause an erection. You need to be sexually arouse for it to work.