opioid and benzos. Opioid withdrawal resembles a severe flu and lasts anywhere from two to six weeks. The symptoms include malaise, confusion, diarrhea and vomiting, fever, body aches and muscle cramping, severe anxiety, mood swings and irritability, rapid heart rate and breathing, sweating, runny nose, shivering and tremors, anorexia and weight loss. I have never heard Doloxene prescribed or used for nausea. It is in fact no longer available in US.