Acxion Fentermina is a prescription medication used to treat adults who are obese or have weight-related medical problems。 It is the brand name for the drug Phentermine， and it works by suppressing the appetite and increasing the amount of energy the body uses。 Acxion Fentermina has been approved by the U。S。 Food and Drug Administration （FDA） since 1959， making it one of the oldest and most widely-prescribed medications for weight loss and weight management。 Acxion Fentermina is a sympathomimetic amine， meaning it stimulates the body’s sympathetic nervous system， which is responsible for regulating energy metabolism。 It works by increasing the amount of norepinephrine， a neurotransmitter， in the brain and other parts of the body。