Tadalafil
"Did 2.5 mg/day for 1 week, moved to 5 mg after that. After 10 days, developed mild ringing in ears and a few other mild symptoms. Stopped Cialis. Too late, damage already done to hair cells in cochlea (inner ear). Then did Prednisone (5 days at 30 mg, then 5 days at 15 mg), which seems to have helped the ringing in the ears. After 6 weeks of no Cialis I then started again but this 2nd round had NO side effects at all and ringing in ears seems to be diminishing. Been on 5 mg again now for 3 weeks, all ok, very good positive effects (but ringing hasn't completely gone). My drug plan pays 100% luckily as long as I buy it in 90 day supply ($450) to incur only 1 pharma dispensing fee."