Table 2. Classification of drugs and toxins associated with PAH (adapted from the 6th WSPH).

Definite	Possible
Aminorex	Cocaine
Fenfluramine	Phenylpropanolamine
Dexfenfluramine	L-tryptophan
Benfluorex	St John’s wort
Methamphetamines	Amphetamines
Dasatinib	Interferon-α and -β
Toxic rapeseed oil	Alkylating agents
	Bosutinib
	Direct-acting antiviral agents against hepatitis C virus leflunomide
	Indirubin (Chinese herb Qing-Dai)

PAH, pulmonary arterial hypertension.