Side effects of antimicribial drugs (antibiotics) can include kidney damage (due to the kidney filtration system), allergic reactions to certain kinds of antibiotics as well as disruption of normal (good) microbiota (which is why many people choose to take probiotics while taking anitibiotics to keep the normal microbiota levels high).
You should treat her as a patient and a normal person, as you should treat any patient. Do not let personal connections get in the way of a professional mental disorder situation. Treat her with care and as a patient. At work play your role as coworker, and in the group play the role as caregiver.
Cardiovascular exercise is any exercise that gets the heart rate up and increases blood circulation. Cardiovascular exercise utilizes large muscle groups. Aerobic exercise requires to use large muscle groups rhythmically and continuously. These muscle movement over a sustained period of time keep the heart rate to at least 50% of its maximum level.