**** 5 mg online is used to treat erectile dysfunction and the symptoms of benign prostatic hyperplasia, which include difficulty urinating and painful urination. The medication inhibits phosphodiesterase type 5 (PDE5), an enzyme present in the penile corpora cavernosa. This inhibition increases cGMP levels, a substance that promotes relaxation of smooth muscle and dilation of blood vessels. As a result, more blood flows to the penis during sexual stimulation, making an erection easier. Hence, 5 mg of **** is essentially an erection facilitator. For it to have a practical effect, arousal is required.