why am I am hungry after taking phentermine?

If a weight loss patient doesn't eat, the body does not get enough proteins, fat, carbs, vitamins and minerals needed for normal metabolism. So we advise you to eat but not in excess. The duration of Phentermine anorexigenic activity can reach 24 hours. Some weight loss patients start feeling extremely hungry within just 7-8 hours after the intake of single Phentermine dose

Phentermine is one of several drugs used to treat obesity. It works by causing users to feel full faster, so weight loss patients don’t eat as much food. Phentermine is a stimulant medication. Stimulants give you energy by temporarily revving up your central nervous system and increasing blood flow to your brain. Eating activates a feed-forward loop that's part of a broader neurobiological mechanism that tells us when we're hungry. In short, stimulants mess with those feedback loops by artificially elevating levels of neurotransmitters in your brain called dopamine, which is involved in hunger regulation as well as motivation and reward-seeking behavior.