Cialis 25 (Tadalafil) is an oral drug manufactured by Nakon Medical and containing active substance Tadalafil which is used to treat male sexual function problems (impotence or erectile dysfunction) by blocking a certain phosphodiesterase enzyme in the body. It also treats benign prostatic hyperplasia and urination problems.

Cialis 25 works by increasing blood flow to the penis during sexual stimulation. The usual dosage of Cialis is 25 mg, it can be taken about 15-30 min before the sexual intercourse and the effect can last for about 36 hours. The main side effects provoked by the usage of Cialis are: chest pain, flushes, headache, stomach disorders or nausea. Cialis comes in boxes, each unit containing 50 pills (25 mg per pill).