Both my parents had blocked coronary arteries in their 50s and 60s and i am 48 now is there preventative medication such as aspirin etc that i should be talking?

Time to get a doc : There was massive progress in the last few decades on prevention and early treatment of cardiac disease. Calculating a modified Framingham score that includes family history would be a good starting point. You will need cholesterol levels as well as blood pressure among others and having all started under the direction of a physician would be the way to go.