Jeremy, I work for a physical therapist, so we see alot of tendonitis. First , I would recommend ibuprofen (Advil) 600-800 mg, 3-4 times a day. That's 3-4 pills, 3-4 times a day, with food or milk. Your MD would probably tell you the same thing, unless you have trouble with ibuprofen, which is also Motrin. I use Motrin IB myself for bursitis in my hips right now. ICE ICE ICE. It relieves the pain,as well as reduces the inflammation, but you have to be consistent. And last but not least. If you can, put down the guitar for a couple of weeks until you don't have any pain at all. then limit yourself to how long you play daily. Good luck, hope this works for you. I've been there and know how it feels. It hurts like the dickens. Hummingbird.