When I was working EMS at college we had a psych patient/student that was in the habit of not taking their medications. This resulted in a lot of calls for them since once off their meds they would do a lot crazy stuff while attending classes. In fact we got called out so much for them that we created a code just for them. If the call out was for a 9-41A, no further information was required other than location, the A was the first letter of their name. Normally a 9-41 was just a psych call.