The first consequence of a drug charge is going to jail in most cases. Second, they will be required to make bond. After they get out on bond, they may be on pretrial supervision. They could then be drug tested and required to report to a probation officer even before they are convicted.
Once a person is arrested for a drug offense, the arrest will be on their record. Often, this drug arrest can lead to the person’s employer firing them. They could also face challenges with getting another job.