Good tips but another solution is to use Medical ID, a great app:
https://forums.androidcentral.com/e?link=https%3A%2F%2Fwww.anrdoezrs.net%2Flinks%2F100048248%2Ftype%2Fdlg%2Fsid%2FUUacUvbUpU3912887%2Fhttps%3A%2F%2Fplay.google.com%2Fstore%2Fapps%2Fdetails%3Fid%3Dapp.medicalid&token=-UDbC_r7