Figure 67 Medicated urethral system for erection (MUSE): using a special applicator, a 125, 250, 500 or 1000 mg suppository of prostaglandin E1 (PGE1 ) is inserted into the uethra (a-c), which has been moistened by preceding micturition. With the patient standing, the penis is rolled between two hands (d) to facilitate the absorption of PGE1 into the corpus spongiosum and, from there, into the corpora cavernosa to enable erection