At the suggestion of my allergist, I keep an updated list of my medications in my handbag. She tells me that if you are taken to the hospital, it is very difficult to reconstruct a list of medicines for the patient. One never knows if they will be in an auto accident or suffer a stroke or other episode and not be able to speak for themselves.
I keep my list on my computer so it is easy to update and to print out, but handwritten is good too. I also list non prescription items my doctors want me to have.
Men can make a list to keep in their wallet. That way every time you leave your house you will have it with you.
Source: My physician