The dynamics of methadone treatment for intravenous opioid users. The major flows in this study were people cycling between being on methadone and off treatment. This is a minimal model of the insights from the more detailed modelling project described in Chalmers J, Ritter A, Heffernan M, McDonnell G. Modelling pharmacotherapy maintenance in Australia. A report prepared for the Australian National Council on Drugs. Sydney: Drug Policy Modelling Program, University of New South Wales; 2009 

WIP combining theories of substance use disorders including addiction and dependence using a framework modified from birckmeyer 2004 article PMID

WIP Summary of Levin Roberts and Hirsch 1975 book subtitled A Computer-Aided Search for Heroin Policy using System Dynamics

Simulate drug amount and drug concentration in blood plasma based on intake amount, intake frequency, drug absorption, drug half life, and body weight