It depends on how much more than 8 hours we're talking about. Consistently oversleeping, especially 10+ hours a night, can be indicative of some potentially ser

It depends on how much more than 8 hours we're talking about. Consistently oversleeping, especially 10+ hours a night, can be indicative of some potentially serious problems that either already exist or may in the future. Rather than making someone feel well-rested, it often has the opposite effect: confusion, lack of energy, sluggishness, etc. due to a poorer quality of sleep in general. I'd imagine that self-medicating with lots of caffeine is a pretty natural response for most people in that situation even though it doesn't actually solve the problem.