Are you at maintenance currently? If so, how long have you been and if not, do you know if "maintenance" wears off in its effects?
I've been on maintenance for years, except for a brief transition from Sema to tirz.
Keep in mind appetite regulation is not coming from GLP directly acting on anything, but via the same systems that decide you've had "enough" and enforces that through the same psychological and physical levers your body would use after stuffing yourself at a big dinner to get you to stop eating.
A good analogy is this
Think of your drive for calorie intake as working like a thermostat. You set it to maintain a certain temp. Below that the heat kicks on to bring the temp up, above it AC turns in to bring it down.
GLPs turn down "weight thermostat" on a dose dependent basis. When your weight is above the set point, your appetite diminishes, food seems less appetizing, sense of smell is diminished, stomach volume decreases, digestion slows inducing acid reflux, keep eating and you'll get nauseated.
As you get closer to the set point the appetite suppression weakens, and once there it stops altogether. That's why you if you stay on the same dose long enough you'll lose a certain amount and then it seems to "stop working" until you increase the dose (turning the thermostat down further). If you were to put on more weight at the same dose, the appetite suppression effect would return, until you reached the set point again.
The "maintainance dose" is whatever dose you stay on after you've reached your goal weight, and the drug is essentially neutral at that point, unless you gain weight, which would be via "eating beyond your appetite", then the effects kick in again.
So in short it's changing your weight set point and your body is doing what it normally would to keep you there, albeit a little more forcefully because there's more GLP available to hit the receptors that make all this happen. (remember, the GLP hormone is produced in the gut, when it's stretched. The reason bariatric surgery works is not mostly because it physically shrinks the room in your stomach, but making it smaller makes it stretch more when you eat releasing larger amounts of GLP.).
For Tirz, 7.5mg. 10mg, 12.5mg or 15mg can be maintainince doses. For Sema it's 1.7mg, 2mg, or 2.4mg.
If you can't get to the minimum maintainance doses without intolerable sides you're supposed to discontinue the drug, per the monographs doctors are supposed to follow, and insurance will cut you off if you can't get there within a year.
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