Tag: Phentermine tolerance

According to anecdotal reports from numerous patients, the most powerful effects of phentermine often occur within the first few weeks of treatment. So, if you're asking, 'Why is my phentermine no longer working for me?', you're experiencing a common phenomenon due to pharmacological tolerance and other factors that diminish its effect over time.

In studies, about one-third of phentermine users are considered “non-responders,” losing less than 3% of body weight in the first three months [1.2.2]. For others, a common question arises: **can you build a tolerance to phentermine**? The answer is yes, and it's a known phenomenon [1.2.1].

According to one long-term study, about 1 in 3 people are 'non-responders' to phentermine, losing less than 3% of their body weight in the first three months. This highlights a common frustration and leads many to ask, 'Why am I still hungry on phentermine?'