Table 2 Updated risk level of drugs and toxins known to be associated with PAH
| 1. Definite | |
| Aminorex | |
| Fenfluramine | |
| Dexfenfluramine | |
| Toxic rapeseed oil | |
| Benfluorex | |
| 2. Likely | |
| Amphetamines | |
| L-tryptophan | |
| Metamphetamines | |
| Dasatinib | |
| 3. Possible | |
| Cocaine | |
| Phenylpropanolamine | |
| St John’s Wort | |
| Chemotherapeutic agents | |
| Selective serotonin reuptake inhibitors | |
| Pergolide | |
| 4. Unlikely | |
| Oral contraceptives | |
| Estrogen therapy | |
| Cigarette smoking |