my sister had knee replacement surgery a month and a half ago. she was give vicodin, oxycontin and percocet for the pain. she still cannot eat or hold anything on her stomach. she cannot sleep and has constantly throws up some type of fluid. she also says that her sense of smell has gotten so bad that she smells the lead in the water, etc., she has also lost over 50 lbs. she has been taken to the emergency room twice where they gave her i.v.s in her arm for her dehydration and sent her back home only telling her to try to eat food. please help me as i know there is something else wrong with her. she has stopped taking those meds a few days after or just before she left rehab. because she did not like the feeling it gave her. please assist as soon as possible...