... I started having an increase in afib. So my NP decided to put me on Diltian 120 mg TABLETS instead. I started having body aches, survere muscle pain and cramping in my back legs and feet. My NP said it was just arthidis. but the pharmasis said I was probley alurgic to the inactave ingreadence. Is there any way I can get a higher doesage of the(24 hour) CARTIA XT CAPSULE ... like a 360 MG CARTIA (24 HOUR ) CAPSULE?