I had atrial fibrillation 4months ago dr found my thyroid levels were high am on flecainide 100mg thyroid level ok do i still need med. ?

Thyroid fixed?: It depends, did they give you medicine like ptu (propylthiouracil) or radioactive iodine to make your hyperthyroidism back to normal? Even then, it may take several months to truly normalize. See an endocrinologist about this. If it is truly normalized, you can try a holiday from the flecainide, but only do this with your cardiologist's permission and monitoring.

Maybe not: We try to identify a reversible precipitating cause for atrial fibrillation, so that fixing that cause may result in elimination of atrial fib. In your case, hyperthyroidism may be a precipitating cause, and once the thyroid fn. Has normalized, you may be watched off flecainide, to see if you have a recurrence.

Probably: Fib is a progressive disease and tends to occur more, the more you have it. The Flecainide may be holding you in normal rhythm. You should also be on a medicine with a name ending in "-olol" like metoprolol (a beta blocker) or Diltiazem or verapamil with that flec, by the way. Ask your cardiologist about why (rate control of flutter in a class ic agent).