One thing I want to emphasize is that to be wary of dispensing medication. The simple answer is unless it is for you or a family member, don't. This may sound harsh but if you do, and there is an adverse reaction or worse, it will be your butt in a sling.
Just because you are using a medication and it works well for you is not a good reason to share it with your friends and family.... It must be dispensed to that person, for that person.
Even in a life and death situation, you may still have to justify your actions later on.