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Acquired autonomic dysfunction
| Malignancy |
| Brain tumors |
| Paraneoplastic syndromes |
| Medication |
| Barbiturates |
| Clonidine |
| Methyldopa |
| Phenoxybenzamine |
| β-blockers |
| Anti-depressants |
| Disopyramide |
| Anti-cholinesterase’s |
| Vincristine |
| Toxins |
| Botulinum |
| Sarin |
| Parathion |
| Venom |
| Mercury poisoning |
| Arsenic |
| Drug withdrawal |
| *Partial list |
| Surgery |
| Sympathectomy |
| Vagal and gastric drainage |
| Heart transplant |
| Lung transplant |
