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Cialis, the brand-name form of tadalafil, is a prescription medication used to treat
erectile dysfunction and symptoms of an enlarged prostate, also known as BPH. Cialis is in
a group of medications called PDE5 inhibitors. These work by increasing blood flow, thus
eliciting an ***. It may also relax the muscles of the prostate and bladder. Cialis
comes in tablet form and is either taken one time before *** activity or at a lower
dose once daily for BPH. Common side effects of Cialis include headache, indigestion, back
pain, and facial flushing.