"i have avn and i began taking the medicine before core depression surgery. i almost decided not to have the surgery as the medicine worked so well. i take it now once a day as i recover from the surgery and it works really well. i don&#039;t have to take hydrocodone any more. my doctor says i will have to stop taking it soon. i have had a stomach ulcer 15 yrs ago and he is concerned but i take zantac and i have had no side effects as of yet. it has been three months."