Here's an old joke for you.
A guy has a medical problem, so he asks his pharmacist. The pharmacist tells him to ask his doctor, so he goes to the doctor and tells him he just asked advice from the pharmacist. The doctor tells him to never take medical advice from a pharmacist. The guy leaves, of course.
Anyway, you can probably call the doctor on Monday and at least find out if you should suspend the drug use. You will likely talk to a nurse or something, but they should be able to get back to you with the doc's opinion. They don't usually charge for things like this.