I share your frustrations...my local pharmacy is usually swamped knocking out prescriptions. And I don't think drs. know enough about medications to notice if there WERE an interaction.

Example....I took a blood test to get everything checked. My potassium came back a bit low. I am already taking a potassium-sparring medication (which I had listed when I first saw this dr.) and the dr. who tested me told me to take a potassium supplement. I called my dermatologist, who prescribes the potassium-sparring med, and was like "WHOA, no you do not need a potassium supplement." He ordered another blood test, and it came back normal...or else we were going to have to investigate further why I had low potassium on a med that increases potassium. I am NOT going back to that dr who did my original bloodwork...clearly he isn't careful enough to notice my meds and take those into consideration.

I also don't trust pharmacists when I call with a drug interaction question, especially when they say they are "looking it up"...often pharmacists are looking in books anyway or one of those handheld devices I have seen drs use as well.

I usually use a drug interaction checker, which sometimes does lead to more questions if the interactions are not clear enough, and then I call a pharmacist to clarify the language of the interaction. Drugs.com has a good interaction checker:

Drug Interactions Checker | Drugs.com

You just have to agree that you are not holding them legally responsible (and I am not suggesting they should ever be the final say, either)... and then you can put all your meds in and see what you get. I always get the one where they say "these meds together could cause drowsiness", but that is a common side effect (I think) for a lot of the kind of drugs some of us on here take.