Nope, but anyone with afib that causes a rapid heart rate (over 100) needs to take a rate limiting drug to avoid heart failure. Beta blockers are the most common but there are also calcium channel blockers like diltiazem and verapamil, and in the past digoxin was used but it's no longer recommended for afib unless the person also has heart failure.
If you're afib is paroxysmal and you're not taking flecainide, you can take it as needed only during episodes if you want. But you shouldn't allow your heart to remain at rates over 100 for prolonged periods. That can cause heart enlargement and heart failure.