1. The Vitamin C can prevent (sort of) the LSD experience if they are
consumed together, especially if the Vitamin C dose is large (1 gram or
more). A sort of mild up-and-down experience can result from this
combination
2. Taking the Vitamin C two hours before LSD works well.
3. Taking enough Vitamin C to saturate the tissues works well if enough
time is allowed (2 hrs., perhaps less).
4. The LSD effect is slightly weaker, quantitatively speaking, than without
Vitamin C, and ends sooner too.
5. It's typically easier to sleep afterwards also.
6. The "sense" of time, and of distances, is less disturbed with also.
3 grams of Vitamin C will saturate most people's bodies well. A good method
of eating this much C without gastric discomfort is to drink a solution of 3
grams of buffered Vitamin C that is dissolved (not just stirred into!) in a
glass of water. (People who keep their bodies saturated with Vitamin C may
notice that their urine is colored a brilliant yellow color. This is
normal.)
It's possible that a smaller dose of Vitamin C will have the same effect on
LSD effects; a half-gram tablet might be sufficient for example. However,
a significant time delay will still be required before taking LSD.
I suspect that the "confusion" that Vitamin C reduces is actually very
valuable for death-rebirth religious experiences; it's not a "bad
side-effect" of LSD, in other words. However, such confusion makes an LSD
user very vulnerable to "head-trips" and other dangers (that may occur
either inside or outside of a "controlled setting"). There seems to be less
of the amphetamine-like edginess of LSD in this combination; and I suspect
the difference is not just the result of acidic urine washing the body clear
of an exogenous amine.