Hi

Both my PIL are pharmacists, and so i get them to check out everything that i need to take.. They often call the drug manafacture for me to find out exactly what is in things, after looking it up in their drug reference manaual. It is better to speak directly to your pharmacist (as oppossed to your dr) about drug and drug interactions, as that is their specialty, and they often tell me that they have cases of the dr pescribing stuff which would have terribel interactions. But basically everything should be check off against the above guide that Cailin put up.