Imagine that your friend who got into methamphetamine a while back has graduated from doing a bump before going out on Saturday night to snorting fat lines for

Imagine that your friend who got into methamphetamine a while back has graduated from doing a bump before going out on Saturday night to snorting fat lines for breakfast, and some more before dinner, and now it's "oh, hell, midnight on a Tuesday already, why don't we just stay up all night again". Their ideas are getting weird, they're starting to feel the toll relentless insomnia takes, they can see the crash coming, they know - deep down - that they really ought to stop, and then they ask: "any reason I shouldn't just start knocking myself out with Xanax every night so I can sleep?" What do you tell them?