Another option for treating erectile dysfunction is intraurethral therapy, or as it’s officially known,
medicated urethral system for erections, or MUSE. The medication used in MUSE is alprostadil, which is also one of the drugs used most widely in penile injection therapy. However, MUSE requires no injections.
A small pellet of the medication is introduced into the end of penis, which is known as the urethra, via an applicator consisting of a thin tube at the end of which is the medication. Once the tube is inserted well within the penis, a button on the applicator can be pressed to release the medicated pellet.
Absorbed through the membrane that lines the inside of the urethra, the alprostadil relaxes the blood
vessels that supply the penis, sharply increasing blood flow. An erection usually develops within 10 minutes after the medication is released. The erection almost always lasts for at least 30 minutes and sometimes for up to an hour.