Pregabalin misuse and abrupt cessation a recipe for delirium: case

The patient was prescribed the medication for pain relief but developed hallucinations and agitation.
Pregabalin

Taking 13 times the prescribed daily dose of pregabalin before abruptly stopping treatment ended badly for a middle-aged man who was hospitalised with delirium, report doctors in India. 

The patient, in his mid-50s, was prescribed 150mg/day of the neuropathic painkiller due to a prolapsed intervertebral disc (L2 and L3), in addition to a tapered seven-day regimen of oral prednisolone.