a table showing which drugs cause short term long term memory loss and dementia like symptoms long term memory loss has been associated with benzodiazepines antihistamines incontinence drugs narcotic painkillers sleeping aids and the older class of tricyclic antidepressants short term memory loss has been asssociated with benzodiazepines antihistamines anti seizure drugs narcotic painkillers and the older class of trycyclic antidepressants dementia like symptoms have been linked to antihistamines certain incontinence drugs such as anti nausea and muscle relaxers and the older class of tricyclic antidepressants