took too many diltiazem 180 mg diltiazem 120 mg 24 hr does diltiazem lower heart rate can you stop diltiazem abruptly diltiazem 30 mg twice day diltiazem iv push how fast indications for diltiazem diltiazem dose for atrial fibrillation diltiazem effect on heart rate diltiazem 240 mg cp24 discounts substitute for diltiazem diltiazem shortage alternative diltiazem 90 mg etken maddesignsllc