I don't know, I tend to notice the effect wears off over time. Not sure it's a good idea to consume it permanently. Perhaps a better use would be for short periods to course correct.
The safety profile of the drugs with diabetics, and the health benefits that come from the associated weight loss may make permanent use a net benefit for most people. There appears to be little, if any, "course correction" effect from taking it for short periods of time.
I am not saying that those variations are great from a health point of view, but they are certainly not as bad as staying obese.
I now take a one week break every few months and have not noticed any decline in effects over time.
My suggestion would be to find an endocrinologist that specialises in obesity and these weight loss drugs. They will have dealt with patients who have experienced tolerance and have developed ways to work around it from real life experience. Obviously well-studied protocols with evidence would be preferable, but with how new these drugs are there hasn't been long enough to collect it yet.
Also it should be mostly used as an adjunct to strict diet and exercise.
Letting your weight fluctuate up and down in giant swings is, in many ways, harder on the body than just staying at a steady weight, even if it's overweight.
There’s nothing in these drugs that makes you lose more muscle than fat, you don’t lose any more muscle than if you do a regular diet, not even slightly.
Second, the drugs don’t do anything to cause you to gain back mostly fat, and people going off them have more success, not less, than your average person who loses weight rapidly whether through diet or other means.
The average person who is 50lbs overweight because they gained 5lbs a year for a decade will lose all of that weight within 6 months with nearly entirely positive side effects, and if they stop taking it, will regain a bit less than they did before, meaning it would take another decade to get back to where they were. That is unequivocally a huge net positive.
It’s not like Testosterone which does have dramatic negative effects when taken long term and can cause dependency.
It also happens to be extremely effective at reducing bad habits, and yes those habit changes persist after quitting - not perfectly, but surprisingly so. This even works for smoking, drinking, and gambling.