I finally got a medical alert ID necklace saying that I have MS and a baclofen pump. I'm not crazy about things hanging around my neck, and the one I picked is a heavy dog tag style that will take some getting used to. On the positive side, it came with a bead chain so I could lop off a few inches to get the length I wanted.
It's mostly for my baclofen pump. It's rare for them to leak, but if they do you not only have an overdose situation, but according to an ER doctor I saw, you can be mistaken for being dead. Baclofen also has a long half life. So if doctors know you have a baclofen overdose, they're required to wait a few days for you to wake up before pronouncing you dead!
On the other hand, if the pump were to stop working (also very rare) you could have serious withdrawal.
My new neurologist says the pumps are very reliable, and the only problem he's ever seen with them was when a surgeon accidentally the catheter that goes between the pump and the space around the spinal cord while performing surgery. If I ever need to have surgery, remind me to tell the surgeon not to do that!