Complementary, alternative and traditional medicines — branching viva

Opening (warm-up)

Examiner: "You are the general paediatric registrar. I am handing you two children. In the first, a four-year-old of South Asian heritage presents with abdominal pain, constipation and a microcytic anaemia; the mother mentions an Ayurvedic preparation the child has been taking for strength. In the second, the mother of a 10-year-old with epilepsy has started giving him St John's wort for his mood. Tell me how you think about each." ^[1]

Model answer: Both are complementary and alternative medicine (CAM) exposures, but they carry different risks through the same four-pathway framework. The Ayurvedic preparation is a whole medical system product and the principal concern is heavy-metal contamination — the child's abdominal pain, constipation and anaemia make lead poisoning the leading diagnosis, so I would send a venous blood lead level. The St John's wort is a biologically based therapy (a botanical) and the principal concern is a herb-drug interaction — St John's wort induces CYP3A4 and P-glycoprotein and can lower antiseizure medicine levels, so I would ask exactly which antiseizure drugs he takes, check the levels, and advise stopping the St John's wort. ^{[8] [5]}