Tag: Stimulant crash

While phentermine is a stimulant, fatigue is a commonly reported side effect, especially in the afternoon or after a period of over-stimulation [1.2.1, 1.2.4]. Understanding this paradoxical effect is key to managing your energy levels. So, why am I so tired on phentermine?

According to user reviews and clinical reports, some individuals do experience a significant drop in energy and motivation while taking this medication. This can lead to a state of perceived “laziness,” prompting many to ask, "Can Vyvanse cause laziness?".