This didn't happen years ago but started happening with the cheaper long acting terro. Now all of them do it and make the neck swell and get really sore. It dawned on me what is going on the other day. I have heard most of our antibiotics and pharmaceuticals are coming from China and if not made there the main ingredients come from there. This is their cheap junk they are sending us. No telling what is in it. It is the companies that are to blame too for buying the crap from them.