a Number of DRD in England/Wales between 2010 and 2018 involving total DRD, opioids, any benzodiazepine, Z-drugs, cocaine, and gabapentinoids, like gabapentin and pregabalin [29]. Substances were implicated in or potentially contributed to DRD. b DRD in Scotland 2000–2018 involving total DRD, opioids, any benzodiazepine, like diazepam, etizolam, diclazepam, and gabapentinoids (gabapentin and pregabalin) [26, 30]. DRD, drug-related death.