★★★★★
In the first 24 hours, I took these items in the morning and evening: 3 T (instead of called for 2 T) of my daily multivitamin, 1000 mg Vitamin C with rose hips, Turmeric 400 mg/95% curcumin (that's how the label shows it). The Turmeric and Vitamin C are taken for their anti-inflammatory properties.
The last supplement, which I believe might be the most important, is MSM lotion (contains 15% MSM). I applied this lotion on the area around every 2 hours. MSM is a good natural painkiller and also works well against different muscular problems and inflammation. I noticed a remarkable decrease in pain a couple hours after applying the MSM lotion the first time, and believe that is the main cause of the decrease. I was unable to do this treatment for the first 5 hours of the tendonitis because of work, otherwise it might have been gone in 24 hours.