How long is LSD detectable in blood, urine, etc.?

Written by: Marvin Benthien



Time to read 5 min

Drug tests are conducted on various occasions, and many users wonder how long detection of certain substances is possible. In most cases, a urine test for drugs is carried out when you are stopped at a traffic control, for example. As a consumer, you then ask yourself the question: How long are drugs detectable in the blood, and what happens now?

The detectability of psychedelic substances depends on the substance consumed and the amount taken. Someone who opts for a one-time trip will have less LSD in his blood than someone who permanently takes high doses. So let us now deal with the question: How long is LSD detectable? And what about microdosing?

How long is LSD detectable in urine? The standard drug test

The common rapid test for various drugs, including detection for LSD, works with urine. You are asked to provide a urine sample, and within a few minutes, the police officer or doctor in charge can read whether you have ingested LSD on a test stick. The special feature here is that no exact quantity is determined. The test only shows whether LSD has been detected (positive result) or not (negative result). But how long does LSD stay in urine?

Here, it depends on the frequency of use. A single use of LSD can be detected for one to two days by urine test. How does it look, for example, if LSD is consumed several times a week? This question has to be answered differently, because in the case of continuous users, a degradation product of LSD can be detected for up to three months. However, this requires particularly high and regular doses. In case of a very high one-time consumption of LSD, the LSD detectability is extended to about four days (in urine).

And how long does LSD remain in the body? Again, the answer depends heavily on the amount taken. The effect during an LSD trip disappears after about four to six hours. The LSD detectability, however, lasts much longer.

How long is LSD detectable in the blood? That's how long laboratories find traces:

The result of the drug test depends on its detectability. LSD can be detected in urine longer than in blood, but longest in hair. Blood tests are usually rarely done, because even the police know that LSD detectability in urine is much better. Expect a detectability of about 12 hours in the blood for single use. Continuous users must be prepared for the substance to remain detectable for up to four days.

Important: We are talking about dosages that are usually not reached even with excessive consumption here. The example of urine shows that a dosage of 100 micrograms can be detected in urine for a maximum of 30 hours. In the blood, on the other hand, this dose is usually no longer detectable after ten hours.

So: how long does LSD stay in the blood? Since the substance breaks down in the body primarily via the liver, LSD is detectable in the blood only when the active drug is still flowing through the bloodstream. As soon as the effect has diminished or ceased, the detectability of LSD also disappears bit by bit.

A blood test cannot detect LSD for as long as a urine test can

Long LSD detectability: hair stores the substance longest

While drugs can only be detected in urine and blood for a short time, the hair roots betray every user. But why is LSD detectable here in particular? Hair has the property to store messenger substances of the body. No direct LSD gets into your hair, but the degradation products of the substance. These are used to measure LSD detectability, and here you must expect a positive test result over several months.

And how long is LSD detectable if you simply cut off your hair? This does not change the LSD detectability, because the hair roots remain. The degradation substances are deposited there and thus penetrate with the hair through the scalp to the outside. If you do not have your hair roots removed, the LSD detectability remains just as high with a bald head as it is with long-haired people.

Can LSD detectability in urine be influenced?

LSD detectability in urine can be influenced in some places by users. On the one hand, the amount of the psychedelic drug consumed plays a role, on the other hand, the speed of excretion. If a user drinks very large amounts of water after ingestion, the degradation products are flushed out more quickly and the test is negative again more quickly.

LSD drug test - what is the most common way to test?

The most common tests work with urine, as the detectability of LSD is most reliable here. An alternative is saliva tests, but these are rarely performed due to lack of accuracy and a shorter display time.

Is microdosing of LSD detectable in urine or blood?

Microdosing involves taking tiny amounts of LSD that are far less than the amount of typical "recreational" use. In most cases, microdosing produces no externally observable effect, making drug screening less likely. However, since a urine test is also supposed to detect drugs in routine examinations (for example, MPU verification) or federal government mustering, the question naturally arises when it comes to microdosing.

We know that a high dose of LSD is detectable longer than a single intake of a standard dose. And how long is LSD detectable if the dosage is at most 1/20 of the recreational dose? In most cases not at all, because the sensitivity of the rapid tests is not high enough. These only produce a positive result above a certain amount, and this is not achieved with microdosing.

Theoretically, it is possible to detect LSD microdosing via the hair roots in a chemical lab test. However, since this takes place almost exclusively when a positive rapid test was available in advance, the probability is low.

Important: Regular microdosing can possibly also be detected in the urine if the breakdown products accumulate in the liver. So if you know about a urine test, refrain from low-dose LSD and also from legal LSD derivatives in any case a few days before!

How long do drugs stay in the blood?

The same detectability does not apply to every substance. Drugs such as cocaine, for example, can be detected for up to a week if used frequently. Benzodiazepines, which are used both in medicine and in the drug world, often remain detectable for up to four weeks in urine tests, but also in the blood.

The ultimate drug screening check chart - urine detectability comparison!

How long is LSD detectable? This is not the only question that is asked again and again. Other drugs and substances can also be detected in urine. So here is a brief overview of how long the most common forms of drugs can be detected in urine:

  • Cannabis: THC can be detectable in urine for up to three days in the case of infrequent ingestion, and for up to three months in the case of long-term use.
  • Speed: The detection limit is three days if the substance was consumed through the nose.
  • MDMA: The use of ecstasy can be detected in the urine for a maximum of four days, whereas in the blood it can only be detected for 12 hours.
  • Barbiturate: If taken continuously, barbiturates can be found in the urine for several weeks, but only for one day if taken once.

Conclusion: Always count on the detectability of LSD

If labs put their minds to it, they can detect LSD and other drugs after use, even over several months. Basically, you should always expect that a positive result is possible (even with microdosing). Take this into account when planning your microdosing.