Originally posted by AKDejaVu:
Blood and urine tests do not provide a means for testig for LSD use. Last I heard, a spinal tap was the only way.
It can be traced through urine and blood samples if the samples are taken within a half hour of the drug's effects beginning to take place. After that, however, a spinal tap is the only means and without permission from the person being tested it is highly illegal to do so. LSD is stored in the spinal fluid and slowly breaks down, however after each dose the amount in the spinal fluid increases by that dose and takes even longer to break down. If the spine is cracked or "ruptured" a person who has taken LSD will experience what is called a "flashback" in which LSD slips back into their body and is absorbed into the brain.
Originally posted by AKDejaVu:
Strange how things like this are well known in any military circles. ANY drug that doesn't show on tests is widely discussed 
Some civilians know their sheeit too. ;-)
-SW