"i have been using bontril for 7.5 weeks with only a 6lb weight loss following a great diet of protein, fruits, and vegetables.  i just phoned my physician&#039;s office and informed them that i plan on taking myself off of the medication secondary to severe constipation, headaches, insomnia, fatigue, and frequent urination.  i have been off the medication for 5 days and feel so much better.  i didn&#039;t realize the potential cardiac complications until today.  oh well, live and learn!  good luck to all!!"