Hydrochlorothiazide and heartbeat irregularities

Written by: Dr. Rowena | Posted: Mar 17 2009

Q: What causes hydrochlorothiazide to sometimes cause heartbeat irregularities or a rapid pulse rate? I stopped that medicine because it scared me.

A: Thiazide diuretics can lower the amount of the chemical potassium in your body. This can lead to an irregular heartbeat. For this reason, many people on hydrochlorothiazide, or similar drugs, are advised to eat a banana every day or take a potassium supplement. You should let your doctor know you are having problems.