"The model used here [18], predicted the number of new HIV and HCV cases prevented based on the needle sharing rate. This included the impact of behavioral changes in injection activities outside of the SIF. The behavioral change, according to Table 2 and Table 3, was only considered twice (once for the first SIF and later for the second SIF)—this modeling decision is apparent in the marginal number of new HIV cases averted in Tables 3, 4 and 5. This calculation of behavioral impact is based on a conservative odds-ratio that falls within the limit specified by Kerr et al. (2005) [40].
"As expected, the results presented in Table 2 and Table 3 show that increasing the scope of SIFs through site expansion would result in a decrease of HIV infection cases. The model predicts: 14–53 fewer HIV cases and 84–327 fewer HCV cases annually, with the marginal range being much smaller: 5–14 fewer HIV cases and 33–84 fewer HCV cases annually.
"This range disparity, as outlined in Table 2 and Table 3, translates into substantial differences between the economic evaluation of SIFs with respect to the cumulative versus marginal estimates: the total effect of establishing SIFs and the effect of establishing each subsequent SIF, respectively.
"For example, according to Table 3, the cumulative annual estimates of new HIV cases averted, translates into a cost savings for society ranging from $0.764 million (benefit) for the first SIF to -$4.1 million (loss) for the seventh SIF. Benefit-cost ratios range from 1.35 to 0.73, and cost-effectiveness values range from $155,914 to $288,294 (cost per lifetime treatment). The cumulative annual estimates of new HCV cases averted translate into a cumulative cost savings that range from $0.769 million (benefit) for the first SIF to -$3.7 million (loss) for the seventh SIF. Benefit-cost ratios range from 1.35 to 0.73, and incremental cost-effectiveness values range from $25,986 to $46,727 (cost per lifetime treatment).
"In contrast, the marginal estimates of Montreal’s SIF expansion translate into a much smaller return. This is particularly true with respect to its benefit-cost and cost-effectiveness ratios. For instance, the marginal benefit-cost ratio varies from 1.35 to 0.77 for HIV and 1.35 to 0.76 for HCV. The marginal cost-effectiveness value for HIV ranges from $155,914 to $436,560 (cost per life- time treatment). The HCV marginal cost-effectiveness value ranges from $25,986 to $66,145 (cost per lifetime treatment)."

According to the United Nations Office on Drugs and Crime:

In the United States in 2015 (the most recent year for which data are available), the retail price of black tar heroin ranged from $20 to $300 per gram; the retail price of South American heroin ranged from $25 to $400 per gram; and the retail price of southwest Asian heroin ranged from $120 to $300 per gram.

In Canada in 2014 (the most recent year for which data are available), the retail price of opium ranged from $43 to $55.90 per gram; and the retail price of heroin ranged from $154.80 to $300.90 per gram.

In the UK in 2015 (the most recent year for which data are available), the retail price of heroin number 2 (heroin base) ranged from $59.30 to $88.9 per gram.

Laws & Policies

"The National Anti-Drug Strategy is a horizontal initiative of 12 federal departments and agencies, led by the Department of Justice, with new and reoriented funding4 covering activities over a five-year period from 2007/08 to 2011/12. The goal of the Strategy is to contribute to safer and healthier communities through coordinated efforts to prevent use, treat dependency, and reduce production and distribution of illicit drugs. Illicit drugs are defined in the Controlled Drugs and Substances Act (CDSA) to include opiates, cocaine and cannabis-related substances (including marihuana) as well as synthetic drugs such as ecstasy and methamphetamine. The Strategy encompasses three action plans: Prevention, Treatment and Enforcement:
"• The objectives of the Prevention Action Plan are to prevent youth from using illicit drugs by enhancing their awareness and understanding of the harmful social and health effects of illicit drug use; and to develop and implement community-based interventions and initiatives to prevent illicit drug use.
"• The objective of the Treatment Action Plan is to support effective treatment and rehabilitation systems and services by developing and implementing innovative and collaborative approaches.
"• The objective of the Enforcement Action Plan is to contribute to the disruption of illicit drug operations in a safe manner, particularly targeting criminal organizations.
"The Strategy‘s action plans are expected to contribute to a reduction in the supply of, and demand for, illicit drugs, which ultimately contributes to safer and healthier communities."

"Our analyses suggest that public perceptions of the relative seriousness of substance abuse problems are incongruent with the actual costs they impose on Canadian society. In particular, the total social costs associated with alcohol are more than twice those for all other illicit drugs in 2002, yet the public consistently rated the overall seriousness of illicit drugs as higher at the national, provincial and local levels in the Canadian Addiction Survey (2004). Interpreting these findings it is possible to suggest that perceptions of the seriousness of illicit drugs are relatively amplified while perceptions of the seriousness of problems associated with alcohol are relatively attenuated in Canadian society."