Sildenafil typically takes 30 to 60 minutes to work for erectile dysfunction. You can take it up to four hours before having sex. Sildenafil does not cause erections on its own. It only works if you are aroused.
Erectile dysfunction is treated with the drug sildenafil. It helps men get an erection by increasing blood flow to the penis. After taking kamagra gel, at least two-thirds of men reported improved erections.
The drug sildenafil is also used to treat pulmonary hypertension (high blood pressure in the blood vessels that supply the lungs).