my doctor says it's paracetamol, but I have been using this for a long time and no reaction. Recently I have been scratched by a kitten. The claw seemed to pinch me in my vein on the joint in my arm. I didn't take notice but came up with a welt running down the vein. Although I understand what the doctor said, but my top part of arm got sore and my lymph nodes under my arm were sore. Please advise.