Lidocaine
"I have had two injections in both my shoulders. The right one I damaged just putting my coat on. I was in serious pain for 10 months. After having the injection 1 year ago I have been pain free. It was very painful when I had it and for about a week after but then it's been fine. My left has been a frozen shoulder for well over 10 years and I have just had an injection for it. It did not hurt as much. No side effects."