1st April 2022

An elderly lady is admitted to hospital with delirium and becomes verbally aggressive towards staff

An elderly lady is admitted to hospital with delirium and becomes verbally aggressive towards staff and attempts to pull out her cannula. She is found to have raised white cell count, and her urine microscopy is positive for gram-negative bacteria. Following the administration of some medication, within a few hours, she becomes ataxic and extremely confused. 

Which of the following medications is the most likely cause?

Select the SINGLE most appropriate option from the list below. Select ONE option only.