Yes, you can be charged with a DUI even when medication was taken according to a prescription if an officer believes the medication impaired your driving at the time. Mississippi law targets impairment of normal faculties, not solely unlawful possession. The presence of medication in a test result does not automatically prove impairment, but it can support a charge if paired with observed signs such as poor coordination or slowed reaction times. Documentation showing lawful use is important evidence to present in defense. A thorough legal response assesses whether the stop and testing were legally conducted and whether medical records support lawful use without impairment. Obtaining prescription and medical records quickly helps demonstrate dosing schedules and therapeutic use. Counsel can challenge procedural errors in testing and present medical context to the court or at administrative hearings to seek reduced charges, dismissal, or preservation of driving privileges.