Many drugs have been linked to SIADH, but members of five drug classes are most often implicated: analgesics (particularly opioids and nonsteroidal anti-inflammatory drugs), antiseizure drugs (particularly carbamazepine), antidepressants (particularly certain selective serotonin reuptake inhibitors, venlafaxine), antipsychotic drugs, and cytotoxic drugs (particularly cyclophosphamide and vincristine).