supraventricular tachycardia
"I took Cartia XT 120 mg once a day for thousands of PACs and PSVT. Cartia is mild, with few side effects, but good results. 

I took (Teva brand) Diltiazem EX 120 mg and had problems. I found out when I took leftover Cartia's that the problem is the Teva brand doesn't work as well for me."