LSD (commonly known as acid, Lucy, lysergic acid diethylamide, and LSD-25) is the most widely known psychedelic drug. It was first synthesized by Dr. Albert Hofmann in 1938. It was first used in a psychiatric setting, but once its ability to induce quasi-religious/transcendental states became known to the general population its use on the street became quite popular. Notable early proponents include Dr. Timothy Leary, Aldous Huxley, and the Merry Pranksters. LSD has since become the standard on which most psychedelic drugs are judged.
It's illegal pretty much everywhere. However, enforcement of laws varies from country to country.
LSD comes in a few different forms. Dosage varies, and most of the time you don't know the dosage.
One of the more common forms of LSD. Each dose is usually perforated into quarter inch sized "hits". Blotter paper can have artwork on it, or it can be "white on white", with no artwork. More than 200 types of LSD tabs have been encountered since 1969 and more than 350 blotter paper designs have been observed since 1975.
Liquid is a more rare form of LSD, with each drop being considered a dose. The potency of a single, normal drop is 100ug. Drops can be placed on sugar cubes, blotter paper, candy, or even used to make "Electric Kool-Aid" (a combination of LSD and Kool-Aid which was common in the 60s)
About the same time as blotter paper LSD came "Windopane" (aka "Clearlight"), which contained LSD inside a thin gelatin square a quarter of an inch across.
Less common forms
Less common forms include powder or crystal, capsule, and on sugar cubes.
Whilst dosage varies from person to person, the general dosage of LSD is traditionally one blotter. However, this was back in the 70s when LSD was being produced left right and center. Nowadays one is advised to consume 1-2 blotter tabs for a common trip.
Oral LSD Dosages
- Threshold 20 ug
- Light 25 - 75 ug
- Common 50 - 150 ug
- Strong 150 - 400 ug
- Heavy 400 + ug
- LD50 (Lethal Dose) 12,000 ug
It should be noted that the LD50 is estimated as LSD is yet to be recorded as directly responsible to the death of a human being. There is a case of 8 individuals who ended up with "Serum and gastric concentrations of LSD tartrate ranged from 2.1 to 26 nanograms per ml and 1,000 to 7,000 μg per 100 ml, respectively"  which is way beyond the above listed LD50 and they survived without any major detrimental health effects as well as no lingering health effects besides some anxiety. (source needed on that LD50 value)
- Pupil dilation
- Change in perception of time
- A general change in consciousness
- Unusual thoughts and speech
- Slight increase in body temperature
- Unwanted and/or overwhelming feelings
- Hallucinogen Persisting Perception Disorder
LSD generally has a relatively fast tolerance build-up, within 1-3 hours of first dosing to acheive a 100% tollerance. If one was to consume one tab of acid and then consume another an hour later, there would be little to no new effects or amplification of existing ones. It is advised to take the whole dose at the same time. tolerance remains at around 100% (ie. twice previous dose will be needed for the same effects) for 3-5 days and should completely vanish in a week.
MAKE IT STOP
Niacin (Vitamin B-3) can greatly reduce if not stop the effects of an LSD trip. You can pick it up in most vitamin sections of your local supercenter.
Benzodiazapines, (clonazepam, diazepam, lorazepam) and specifically fast acting types such as Alprazolam (brand name Xanax) are another effective way to reduce and/or kill completely the effects of a psychedelic experience.