I have been a meth user on and off for the pasted few years. There were moments I would feel nauseated but would go away. I eat fruit on the daily, along with taking endless amounts of vitamins. Couple hours after smoking, I vomited. I stay hydrated and chew non sugar gum. Anywho, my vomit was stomach acid, water, and this brown substance. What should I do? This hasn t happened before, till now.