Sir I am suffering atrial fibration from last month's my ecg is abnormal my ecg report was atrial fibration..my pulse rate was 109 at that time dr conduct me 2d eco the report was normal ..dr prescribed me rovor 2.5 mg twice a day and cordaron 100 twice a day...now my pulse rate is normal and dr reduce the dose of cordaron 100 to 50 mg twice daily.. unfortunately cordon come in 200 mg and 100 mg how can I take 50 mg twice..shall I spit tablet into half