not listed / othe
"Been taking cartia xt, 120mg twice a day since 2011 for pvc's, pac's, occasional svt, and non-sustained a-fib unrelated to the chest pains I get quite frequently. It helped a lot, but the doctor recently upped my dosage to 180mg twice a day for chest pain that I am now experiencing from coronary spasms due to a myocardial bridge diagnosed via catheterization! Hopefully, the increase in dosage will stop all these terrifying spasms."