My Mother , 95 Years Old, Discharged From SNF With

My mother , 95 years old, discharged from SNF with marinol. She was eating , gaining weight, and no complaint of nausea and vomiting. Now that she's home her doctor is not licensed to prescribe it. Live in Jackson, Ms. so can't find doctor to prescribe. My mother was 120 when discharged, now 108lbs. Can you suggest another medicine?