If any of you are taking statins (for cholesterol) with cardizem... there could be a reaction. Cardizem causes some statins to increase greatly in the blood. (by not being eliminated).. Those affected would be on a cytochrome 450 3a4 pathway. Lipitor is the most affected. Also have to watch and switch your dosage is you take detrol with cardizem. Could be the cause for some of the side effects.