Which one is more effective???? A single pill with combination of two or more contents??? or each separate pill taken together of the same content as that of single pill contents ???? For eg. one tablet named Preva AS 150 meant for blood thinner in which contents are aspirin 150 and clopidgrel 75 mg so my concern is Preva AS 150 is more efficacious?? or two separate tablets of aspirin 150 and clopidgrel 75 taking together is more efficacious??? I am asking for any medicine in general. Thanks for your understanding & valuable suggestions