Midazolam is known for memory impairment that affects events after administration. Which statement is most accurate?

• A. It causes retrograde amnesia
• B. It permanently erases memory
• C. It causes anterograde amnesia
• D. It has no effect on memory

Answer: (C)

Midazolam produces memory impairment by blocking the encoding of new information after administration. This is anterograde amnesia: events that occur during the drug’s action are not reliably stored as long-term memories, while memories from before the dose are generally preserved. The amnestic effect arises from potentiation of GABA-A receptor activity, which dampens neural activity in memory-forming circuits like the hippocampus. The effect is usually temporary and wears off as the drug is eliminated, so it does not permanently erase memory. There can be mild retrograde effects for moments just before administration, but the clinically relevant impairment with midazolam is its anterograde amnesia.