When a person has an illness...

A)they must not drive under any circumstances.
B)they can consume alcohol before driving if they are not taking medication.
C)before getting behind the wheel, they must be aware of the side effects of any medications.Correct
A driver who has taken drugs or is under the effects of medications or other substances that alter their physical or mental state for safe driving must not drive.
Infractions in this regard will be considered serious offences. In the case of medications, it will be necessary to find out, either through the doctor, pharmacist, or the medication's own package leaflet, about possible contraindications for driving.