Erectile dysfunction (ED) or impotence generally refers to the condition where men are unable to get adequate erection for satisfactory sexual intercourse. When ED proves to be a pattern or a persistent problem, it can interfere with a man's self-image as well as his and his partner's sexual life.

As men ages, they feel that the obdurate organ is less intense, need more stimulation to get erect, orgasm is not so satisfying than before and ejaculate less, and when these problem persists for a long period, men gets depressed, frustrated, lose their self-esteem and undoubtedly, it ruins the sexual life of their partner. But ED can occur at any age and it is not just a process of aging. It is a medical condition which is treatable and need to be treated on time. Erectile dysfunction may also be a sign of a physical or emotional problem that requires treatment.

In around 95% of the ED cases, a suitable treatment can be found. Men can now opt for oral anti-ED drug as an easiest option. Cialis or tadalafil is one of the successful drugs evolved for the treatment of ED. Cialis is a class of drug called phosphodiesterase inhibitors. It functions by enhancing the effects of nitric oxide, a chemical that relaxes smooth muscles in your penis during sexual stimulation, and allows increased blood flow into the penis thus making it erect.

You are able to get the maximum effect of a single dosage of Cialis up to 24 to 36 hours, several times longer than other anti-ED drugs such as, Viagra and Levitra.

While using Cialis, you may get headache, indigestion, back pain, muscle aches, flushing, and nasal congestion. In rare instances, Cialis can also result a sudden decrease or loss of vision. It is possible that a prolonged and possibly painful erection may occur after taking Cialis. If you have such an erection, which lasts continuously for more than 4 hours, you should contact a doctor immediately.

Cialis is not advisable to men who have suffered a heart attack within the last six months, people with low blood pressure, high blood pressure, severe liver disease, and retinitis pigmentosa.