available over the counter: no

uses: to treat severe, acute migraine headaches

mechanism of action: unknown

side effects
• common: sensations of cold or warmth, dizziness, drowsiness, fatigue, diarrhea, vomiting, difficulty concentrating
• less common: chills, weakness, stiffness, muscle pain, spasms, indigestion, anxiety
• serious: rare; may cause heart attack, chest pain or tightness, abdominal pain

concerns: do no use if symptoms of coronary artery disease are present