Cialis is the brand name for tadalafil, a drug used to treat erectile dysfunction. It is similar to Viagra and Levitra. Under the brand name Adcirca, tadalafil is used for pulmonary arterial hypertension.
Cialis increases blood flow to the penis, and this enables a man to achieve an erection. It does not lead to sexual arousal. It should be used with caution, and only under medical supervision.
Tadalafil was approved by the United States (U.S.) Food and Drug Administration (FDA) in 2003 for the treatment of erectile dysfunction (ED) and you can buy Cialis online also. It is also used to treat pulmonary arterial hypertension and benign prostatic hyperplasia, a condition in which the prostate gland becomes enlarged, causing problems with urination.
How it works
Cialis used as a medication for erectile dysfunction.
Penile erection occurs when the penis fills with blood. This happens because the blood vessels that bring blood flow to the penis dilate, increasing the blood supply. At the same time, the blood vessels that remove blood from the penis contract. The blood accumulates in the penis, causing an erection.
When a man is sexually stimulated, nitric oxide is released into the penis. Nitric oxide enables the production of cGMP, which controls the dilation and contraction of the blood vessels that carry blood to and from the penis.
Another substance, PDE5, destroys cGMP. When this occurs, the blood vessels return to their normal size, and the erection ends. Tadalafil stops PDE5 from destroying cGMP. This causes the erection to last for longer.
The muscles of the arteries in the walls of the lungs also contain PDE5, which is why the same drug can also help with pulmonary hypertension treatment.
Cialis comes in yellow, film-coated and almond-shaped tablets in 5, 10 and 20 milligram (mg) doses.
Patients with erectile dysfunction can take Cialis as needed, but it should not be taken more frequently than once every 24 hours. Most people buy Levitra online which is a alternate drug Cialis.
For the medication to work, a man needs to be sexually aroused. The drug does not provide an erection without sexual stimulation.
A first dose is 10 milligrams (mg) at least 30 minutes before sexual activity. Dosage can then be adjusted depending on how the individual responds. The maximum is 20 mg as a single dose.
The patient should take no more than one dose in 24 hours, but a daily dose of 10 mg to 20 mg is not recommended. This is because a portion of the drug remains in the system for at least 24 hours.
Patients who expect to be sexually active at least twice a week can take a daily dose of 5 mg, and this may be reduced to 2.5 mg once daily, depending on the individual reaction.
Tadalafil for erectile dysfunction is only for use by adults aged 18 years and above.