I’ve been on Flecainide since 2019, it keeps me out of afib and svts. It’s my fifth meditation in this afib journey, 4 ablations in now. Still have to take meds even so! No side effects w Flecainide or metoprolol to keep my heart rate down. Even got lowered two years ago from 100mg twice a day to 50mg twice. I hope it keeps working, so far my heart’s “plumbing” is great it’s just the “electrical” that is the problem. I understand you should not take Flecainide if you have heart disease, so they keep a close eye on that.
Best of luck to you, none of this is fun stuff!