Ryzumvi is part of the Alpha Blockers class and treats Pupil Dilation Reversal. Alpha blockers are used to treat benign prostatic hyperplasia, hypertension, migraine, and cluster headaches. They work by relaxing certain muscles in your bladder and prostate to treat urinary symptoms. They also work by relaxing blood vessels making blood flow to the heart smoother. Ryzumvi is only available as a brand name drug.