Retrograde amnesia is a side effect associated with the sedative-hypnotic effects of medications.

Retrograde amnesia is the inability to remember information after taking a medication. All sedative-hypnotic drugs have retrograde amnesia side effects, and the degree of amnesia is related to the type of drug and the plasma concentration of the drug, that is to say, the information received determines the degree of amnesia, that is to say, the higher the dose of the drug, the higher the concentration of the drug in the blood, and the more serious amnesia, and the mechanism of which is that the second level of memory is perturbed.

Extended information:

Passive amnesia: the inability to recall events experienced some time after the onset of the disease. It refers to the inability to recall events experienced during a period of time after the onset of the disease, with poor memory of recent events and an inability to retain newly acquired information, while distant memory is preserved.

Retrograde amnesia: the inability to recall events from a period prior to the onset of the disease, and the loss of past information associated with a temporal gradient.

Progressive amnesia: mainly seen in Alzheimer's disease. Instead of direct recognition and preservation, it affects rerecognition and recall, i.e., the patient has amnesia in addition to increasing dementia and apathy. Some patients have both retrograde and cis-amnesia, and transition from one to the other can also be seen, as seen in patients with craniocerebral trauma.

Baidu Encyclopedia - Amnesia