My son is detoxing from oxytocin, He had sugery on his shoulder they in stalled a hook plate to hold everthing in to place, but he had to wait almost 2 years to have sugery so they had him on the pain killer s in the mean time 125mg daily it has been three weeks since his sugery,, but he started detox about a week ago. He has been vomiting, very lose stool and serve stomach cramps is this normal? For withdrawals?