Background Amphetamine, methamphetamine, and cocaine are suspected of being
pulmonary hypertension risk factors based on a small number of case reports along with
pharmacologic similarities to fenfluramine, a diet drug associated with pulmonary arterial
hypertension (PAH). We sought to determine whether rates of stimulant use are increased in
patients believed to have idiopathic PAH compared with patients with PAH and known risk
factors and patients with chronic thromboembolic pulmonary hypertension (CTEPH) …