system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why does Benadryl make me sleepier than OTC sleeping pills.
gpt
Benadryl (diphenhydramine) is actually the main ingredient in almost all OTC sleeping medications. You probably think it makes you sleepier because you often take benadryl when you are trying to stay up, where you would notice it much more than if you took it when lying down (where you would just drift off)