Thank you.
My electronic access to a patient's drug record is the telephone and the fax machine, if I cannot find what I need from the patient, and sometimes you can't because the patient will be in a condition that renders them not able to give a good account of themselves and there may not be any caregiver who's aware of their current situation.
The most reliable source of what they have is a phone call to the local pharmacy. I practise in a fairly rural area, and I only have to make, potentially, seven phone calls to access the one that may have dispensed it. The catch is that if they've used more than one pharmacy then I still don't know, but their pharmacy is usually linked with the other ones.
That's a slightly facetious answer, but basically I have no online rapid way of doing that at all.