After multiple multimillion-dollar seizures of the drug alprazolam – known by its brand name Xanax – in Australia last year, it’s clear that there’s growing demand for the substance.

Sylvester Vinkabb was suspended for a year after he ordered in 16,000 diazepam and Xanax tablets and 100 litres of codeine to the pharmacy he worked for in Derbyshire. The experienced pharmacist ...