Tadalafil is not usually recommended for normal people. Tadalafil is used to treat erectile dysfunction and pulmonary hypertension in men. If normal people take the drug, they may experience abnormalities in the degree of penile erection and duration of erection. Other adverse reactions such as headache, indigestion, nausea, dizziness, flushing, nasopharyngitis, respiratory infections, nasal congestion, back pain and myalgia may also occur. Therefore tadalafil is generally not recommended for normal people. Tadalafil is contraindicated in people who are allergic to any of the ingredients in the product, patients who are taking any form of nitrates, guanylate cyclase stimulators, women, children and other people. It is also recommended that patients who need to take Tadalafil are advised to use the drug under the supervision of a doctor and not to use it privately.