Would you die in space if you previously have taken LSD?

If you've taken LSD and expose yourself to space without the necessary precautions, then yes.

If you've taken LSD and expose yourself to space in a spacesuit, then no. (unless there are further complications, whose probabilities will have increased due to your intoxicated and hallucinary state)

If you've taken LSD and are inside a space station or another enclosed room within space then no, unless you die by another (un)related cause.

But generally LSD has nothing to do wether or not you die in space; it does not however increase your chances to act correctly in potentially lethal situations. (it does the opposite)