Discrimination against drug addicts that suffer with an addiction, only a few will receive treatment due to the complexity of health care systems. Most health care systems do not have insurance coverage for addiction recovery and many health care providers have little to no training in treating addiction. Some doctors do not feel comfortable treating an addiction due to their lack of knowledge and training of the topic. This is one of the reasons why drug dependence is difficult to recover from. Among injecting drug users, the incidence of HIV infection is higher than among other drug addicts, however punitive and discriminatory measures against
Medical necessity (also known as marijuana) for medical purposes is a notable 'medical necessity' case. Cannabis is a plant whose active ingredients are widely reported by sufferers to be effective in pain control for various conditions, usually neuropathic in nature, where common painkillers have not had great benefit; however as a Schedule I drug under the Controlled Substance Act, it is illegal and is targeted by government, police, and anti-drug campaigners: in some states, possession is decriminalized for even non-medical purposes, wherein other states possession is a felony offense. In this case the doctrine of medical necessity would be used by a