available over the counter: no

uses: control of certain types of seizures

mechanism of action: reduces activity parts of  central nervous system; suppresses irregular neuronal firing

side effects
• common: drowsiness, dizziness, loss of coordination, double vision
• less common: loss of appetite, nausea, vomiting, impotence, rash,
• serious: fever, sore throat, swollen glands, mouth sores or bleeding gums, easy bruising, weakness, confusion

concerns: do not stop medication abruptly;  taper, per physician over weeks