angina
"Had two heart caths to fix a blocked right artery but the Docs were unsuccessful.  I've been on Ranexa for about a year for angina pain. Started on 1000 mg twice daily but after a couple months I began to get dizzy spells. So I cut back to 500 mg twice daily and I still have no angina pain and now no dizziness. Tried to cut back to 500 mg once a day, but angina came back. So Ranexa definitely helps. I'm now back to taking 500 mg twice daily."