Job advice

My dad has to take a cement truck job, its 6 days a week and he’ll be driving at varying start times. Apparently on days with early pours the start time each day can be from 2AM to 7AM, and you have to call in each morning to find out your start time. He’ll be working 10-14 hour days and theres no breaks or lunches. He went on a ride along and found out from a driver who’s been there for a long time that he’ll have to get a prescription for adderal or some type of stimulant to be able to do it. He struggles with sleep, depression and a herniated disc. He’ll have so little time to do anything and im worried for his health. Does anyone know what could help, we have magnesium glycinate and L theanine and he takes melatonin.