Cannabis sativa L. was brought to Africa by Arab traders, and has been cultivated for at least 5 000 years for many established medical and historical purposes. [1][2][3] Marijuana and hemp are colloquial names for cannabis strains of the same plant genus. Hemp is characterised by a low concentration of delta-9-tetrahydrocannabinol (Δ 9 -THC), the primary psychoactive compound in C. sativa, popularising hemp cannabidiol (CBD) oils, as the medical benefits can be obtained without the psychoactive effect of marijuana, the latter characterised by high concentrations of Δ 9 -THC.CBD demonstrates a decreased agonism of the CB-1 receptor compared with Δ 9 -THC, explaining the absence of psychoactive effects. [4] It is claimed that CBD can reduce the use of opioids owing to its antinociceptive effects in inflammation models, reducing heroin-seeking behaviour. [5][6][7][8] After numerous calls for legalisation from the South African (SA) public and activists, despite some caution raised by academics, [9,10] C. sativa access laws were passed, first by legalising the private use of cannabis, [11][12][13][14] and secondly, by amendments to the schedules of the Medicines and Related Substances Act No. 101 of 1965 (Medicines Act), [15] applying a threshold concentration approach for CBD and Δ 9 -THC.As with all crucial decisions, unforeseen consequences have created dilemmas. One of these is that hemp products and CBD oils are contaminated with Δ 9 -THC owing to unregulated cannabis plant strains, ineffective enrichment and purification procedures, inadequate analytical quality control and testing and known law enforcement constraints to ensure product compliance in SA. These factors were legitimate concerns before legalisation, and have This open-access article is distributed under Creative Commons licence CC-BY-NC 4.0.