The legalisation of cannabis by the High Court of South Africa, which was confirmed by the Constitutional Court, imposes challenges to occupational medical practitioners acting as medical review officers in compliance ...

Tryptophan, an essential amino acid, follows important metabolic pathways for protein, niacin and serotonin synthesis. The kynurenine pathway is a major pathway for tryptophan degradation. Indications are that tryptophan ...

Amphetamine and related derivatives are widely abused central- and psychostimulants. Detection of certain derivatives, such as methcathinone, by commonly available immunoassay screening techniques is insufficient. Multi-analyte ...