Muse. Medicated Urethral System for Erection. Alprostadil, a rival to Sildenafil (Viagra) manufactured by Astra (in their days before merging with Zeneca). It's a tricky little applicator you have to use to 'squirt' a pellet of Alprostodil up the, erm...how shall I put this delicately....'optical organ' of the Oriental gentleman. If you will.