| Recreational drugs: Cannabis, cocaine, ecstasy, amphetamines, LSD, binge drinking |
Pregnancy |
| Sympathomimetics, nasal decongestants: ephedrine, pseudoephedrine |
Eclampsia, preeclampsia |
| Serotonergic drugs: selective serotonin reuptake inhibitors, triptans |
Neoplasia: phaeochromocytoma, bronchial carcinoid, glomus tumour |
| Immunosuppressants: tacrolimus, cyclophosphamide |
Neurosurgery, head injury |
| Nicotine patches |
Hypercalcaemia |
| Herbal medications: ginseng |
Porphyria |
| Blood products: erythropoietin, immunoglobulin, red cell transfusion |
Intracerebral haemorrhage, subarachnoid haemorrhage |
