dear docter,i have thoraid problem,i am 50 years old i got married at the age of 15,from the begining i use to have periods 3 times a year,that also for 2 days only,i have 4 sons normal delivery,i am very fat,200 pounds weight,i am only 5",not tall,i am takeing thoirexine since 3 years i want to know have i to take these tablets forever? thankyou .. sasha