[rrrrrrrrrrrryan]

I had sleep paralysis as a child once in a while (which isn't uncommon), but as an adult I only get it after a period where when I've consumed cannabis with some regularity, then stopped.

It may or may not apply to you, but my friends that have sleep paralysis say this anecdote holds true for them as well.

[monadgonad]

Similarly, I get it if I've been drinking a few days in a row, then stop. Both of these drugs suppress REM sleep so my theory is that the sleep paralysis is a rebound effect.