Do people put their medications on their medical IDs?

This depends on the medication. 

When starting something new, it’s a good idea to ask your doctor whether you need to update your engraving. Additionally, some prescriptions even come with advisories about this, such as blood thinners. If you have a lot of medications, or they change frequently, you may want to include, “See Wallet Card,” and carry an updated list of what you’re taking. You can add a wallet card to your order here.