It is no longer used due mainly to safety concerns, as it has a serotonergic effects profile similar to other withdrawn appetite suppressants such as fenfluramine and aminorex which were found to cause pulmonary hypertension and cardiac fibrosis following prolonged use.
This medication is no longer in use primarily because of safety concerns, as it has a similar serotonergic effects profile to other discontinued appetite suppressants such as fenfluramine and aminorex, which have been linked to serious health issues like pulmonary hypertension and cardiac fibrosis after prolonged use.