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When a man is sexually stimulated, his body's normal response is to increase blood flow to his penis to produce an erection. By controlling the enzyme, tadalafil helps to maintain an erection after the penis is stroked by increasing blood flow to the penis. Without physical action to the penis, such as that occurring during sexual intercourse, tadalafil will not work to cause an erection.

Taking two erectile dysfunctions together can cause serious and life-threatening complications such as a dangerous drop in blood pressure and long-lasting painful erections (priapism). If you are unsure which treatment is most suitable for you, speak to your doctor or ask a pharmacist for advice. Sexual stimulation causes tissues in the penis to release a chemical called cyclic guanosine monophosphate (cGMP), which causes the blood vessels to dilate.

If you’re unsure which ED treatment will be best for you then take our free ED assessment and our clinicians will help you decide. The more common side effects of Sildenafil Online can include headache, nausea, stuffy nose, flushing and indigestion. There are also some rarer side effects