"i have been taking this medication for approximately l month  and have lost  23 pounds.  have not had to take the tablet at night because i am not hungry.  i do have a little more energy but am having trouble with sleep.  it did cause me to have severe constipation.  my doctor told me to take pericolace. it is very expensive so i bought the cheaper equivalent.  i take one in the am and 1 in the pm.  i take a bundle of medications which also cause constipation, tiredness, sleepiness, drowsiness.  so, i don&#039;t think the contrave is  the problem, but it did add to it. i do forget to eat and am worried about getting enough protein. so, i bought ensure.  i seem to have more energy and forget to eat because i am not hungry."