A Certificated Medication Aide (CMA) can administer medications in assisted living facilities, rehabilitation centers, drug clinics, group homes, shelters and penitentiaries. Job duties of a medication aide include preparing, administering and maintaining medications, assisting clients with self-administration of prescribed medications, asepsis, basic pharmacology and documentation. Adding a registered medication aide certification onto a current CNA license can increase hourly wages to $16 - $20 per hour.