I am 8 months in, you do develop a tolerance over time to the drug (and why you need to increase the dosage progressively). I have gone up slower than the prescibed steps but still, this drug is to help doing diets, I don't think it would work as a long term medication. And as far as I can tell, when you get off the drug or have become tolerant to the current dosage, it is easy to gain back some weight if you are not careful. So the point being I don't think it will suppress completely obesity, but it will certainly help people make a time limited effort to go down to a lower weight.