https://www.healthadvocate.com/site/article/employees-suffering-losses-from-addiction-lose-their-jobs-last

"according to the National Safety Council, employees who abuse drugs are 2–5 times more likely to:

Take unexcused absences.

Be late for work.

Quit or be fired within 1 year of employment.

Be involved in workplace incidents.

File workers’ compensation claims.

Those costs add up very quickly with just one employee struggling with substance abuse at work and even faster if there are multiple abusers."