After being diagnosed with AF 3 years ago I soon gave up caffeine in tea and coffee as well as tonic water as they appeared to act as triggers. I've recently changed medication from Bisoprol beta blockers to a drug called Tildiem. My episodes of af seem to have increased since but the only factor common appears to be RED WINE. Anyone else? I was OK before change of tablets but didn't like the side effects of bisoporol.