I understand and agree with the issue(s)/dangers of using multiple pharmacies (or doctors), thus, I pretty much use only one unless I know from my own questioning of my primary pharmacist, or doctor, etc, that it's not an issue. I also try to make sure that each doctor is aware of, or covered with appropriate record copies, of any other care. But I agree that's not all that common, from what I understand. I also understand your point of how you might inadvertently know something about a condition I have, but you can't backstop everyone who has failed to consult with their doctor... or every ineffective doctor who has failed to ask his patients what (s)he should. I've never seen a Pharmacist who had the time to go online to review every patient's medical record, other than what's on the pharmacy's computer system... have you?