further to my reply above , i am in Australia and cartia is the low dose aspirin 100mg made by glaxo smith kline, but i do believe there is a tablet called cartia that is from the cardizem family, and i don't know which one you have, you need to find out , but if a cardiologist has given them to you , then you need to sort it out with them.
i am not a medical person but cardizem and cartia are not the same, i take both these medicatiions. cardizem is for palpatations and what people call missed beats or extra beats, and cartia is low dose aspirin to keep blood thin to help prevent clots that cause heart attack and stroke.