In fact, researchers believe addiction is about 50 per cent genetic predisposition. And the other 50 per cent?

It’s certainly not determined by material wealth. Addiction knows no socio-economic bounds: 10 per cent of teachers, 10 per cent of plumbers, and 10 per cent of CEOs have an addiction.

September 2021 update:

Recent research indicates that drug usage amongst older adults is rising.

• 40% of New Zealanders aged 50+ are hazardous drinkers
• 13% in this age group use cannabis
• Around 30% are taking medications that interact with alcohol