"i have been on meridia for almost a week now.  i have not weighed myself due to the fact i hate the scale. the drug took effect after about 2 days where i can honestly say that my cravings/snack sessions have ceased, i have begun to try portion control, and it seems to work (where i am satisfied with a lot less).  i am not constipated and i do feel like i have more energy, but i&#039;m still able to get a decent nights sleep.  i notice if i exercise (even if i don&#039;t feel like it) i get energy.  my blood pressure is fine thus far, but i will continue to monitor it as i progress. no headaches, or break through bleeding, no stomach aches. i have a slight lower back ache, but that may be to the sit ups being done improperly."