The stretch that helps this condition is to extend (straighten) your elbow, then with the other hand, flex (bend) the wrist.
You'll feel it stretching the outside of the elbow, where the pain from tennis elbow
is. Do this at least 20-30 times a day, holding the stretch 30 seconds at a time. Autologous blood injections (prp) are done in my office which is not medication.