available over the counter: no

uses: treatment of  headaches and postoperative pain

mechanism of action: blocks pain impulses in the brain and spinal cord

side effects
• commom: headache, sedation, dizziness, insomnia
• less common: nervousness, unusual dreams, agitation, euphoria
• serious: shallow breathing, congestion, altered mental state, runny nose, blurred vision

concerns: may be habit forming; do not stop taking this medication abruptly