Based on the qualitative analyses, we define a few distinct types of poly-drug activities: separate, synergistic, and indiscriminate use. When separate and synergistic poly-drug use tended being intentional, indiscriminate poly-drug use frequently was unintentional. These conclusions show the value of recognizing poly-drug use as a common phenomenon. The results introduced http://erickifeys.blogocial.com/How-methamphetamine-penalty-can-Save-You-Time-Stress-and-Money--39624807