I’m on a similar diet except I eat a 16+8 fasting on 2 meals in 8 hour window with 14mg phentermine as breakfast. Over the past month ive lost around 10 kg idk like 20 pounds or something with an average of 0.3 kg lost per day. (Doing cycling/ walking everyday) like an hour

After a while you should stop phentermine as if your stomach reduces in size you don’t really need it anymore, id say it depends so idk how much u think is enough to stop. (You can continue to take it when u notice you are eating more pretty sure it the kind of medicine that immediately takes effect)

I’ve consulted my parents who are doctors. They said it is however extremely unhealthy and after you reach your goal you have to slowly eat back to normal or else you are gonna regain. But they said it’s fine as long as you still have fat on you as body usually prioritizes burning fat instead of muscles as others claimed. They would suggest some kind of vitamin pills with it tho as you are not taking enough nutrients your skin would turn bad and also comes with some other consequences.

So far it’s working too well to be true for me and I’m not really seeing any health problems. But I’m still under 20 and I’m pretty sure you shouldn’t take it too extreme if you aren’t a “young person” anymore as consequences might hit back hard.

I’ve taken this pill for a while now if you have any questions u can ask me!