Same here. I agree that most PCPs lack knowledge about most medications (specialists are a little better with the meds pertinent to their specialties that they prescribe often), and have even less knowledge regarding supplements.

It's my pharmacist who contacts me regarding medication interactions, and notifies my PCP at the same time. One reason for this is that I always use the same pharmacy and my list of prescriptions is on their system, which automatically checks for interactions with anything else on my list. They also offer to do this free for anyone who brings in their list of meds, whether a customer or not.

Vitamins & supplements aren't usually checked for, so I have to check them for myself. There are many sites (some of which have been discussed here) for checking interactions. There may also be apps for doing this on smart phones, tablets, etc.

Medicine, like technology, is changing so fast that it's realistically impossible for every doctor to be on top of every new development.

Agree with en bloc's other points as well.

Doc