I just took the last 2 cc shot out of a 10 ml bottle of Cypionate yesterday morning. The injection site was my left quad. Starting last night, and today, my entire left quad muscle is extremely sore. Expecially down near my knee. I used a 1" syringe. I've taken shots in the quad before, and never experienced this much discomfort. The only thing I can think is that the gear was left in the car for a few days with extremem temperatures. Is it possible for the oil to go rancid and cause any negative side effects?
Any help would be great.