"i have only used this medication once and it was amazing for controlling my appetite, even better than phentermine. however, i have migraines and am being treated for them with topamax. i had a mild headache before taking the bontril and after taking the bontril the headache only got worse throughout the day. my energy and mood was terrific, appetite was suppressed. i had total control of what i ate all day and night. when night came, i was in terrible pain with my migraine. none of my usual rescue medicines worked (imitrex). i was getting nervous, come bedtime, i was restless, could not sleep, had a terrible migraine all night long, like the bontril wouldn&#039;t wear off. i almost went to urgent care for my head since imitrex was not working."