How long does LSD stay in your system?

Like all illicit drugs, LSD can remain in the body for over 10 hours from the time it is used. Besides that, the metabolite 2-oxo-hydroxy-LSD is able to stay in the body for more than four days.


Because of its hallucinogenic properties, LSD is classified as illegal and found among many street drugs. Commonly, LSD is ingested in capsule or liquid form but can also be taken sublingually. 

Its use often causes a lasting effect, which is described as being psychedelic in nature. Although it does not contain highly addictive properties, it is still placed in the Schedule I category for illegal substances. 

After a person takes LSD, it may take two hours before its effects will be felt, although many times, it can be much quicker than that. 

Detecting LSD in the Body

With a half-life that is considered short-term, half of its dose is not detectable after a certain amount of time and once the body clears it out. Besides that, an individual’s weight and age also impact the amount of time it takes for the body to metabolize and expel it.

To detect illicit drugs, four ways can be utilized: hair, saliva, urine, and blood. These all can also determine the type and its amount within the body. 

To test for LSD, the methods used often for detection purposes include:

90 Days10-12 hours10-12 hours5 days
LSD Detection Times

Methods Affecting the Detectability of LSD 

On top of the test, other methods determine the amount of time the drug remains in the body. These methods all have an impact on the amount of time that it can be detected:


Ingesting food with LSD makes your system take more time for metabolizing. If taken alone, the drug will have faster effects, and the body will expel it faster. 

Body Condition

The body condition can impact the amount of time it takes to detect it. If an individual has an illness or a liver condition, they will have difficulty ridding the drug. This means the drug remains in the body for a more extended period. 

Composition of the Body

The composition of the body can also determine the amount of time any drug sticks around. Usually, a thin and short individual will need more time as compared to an obese individual.

A Person’s Age

The age of a person influences the amount of time because a younger person typically has good health compared to an older individual. A younger individual has an easier time breaking it down.

Mixing with Multiple Medications

When LSD is mixed along with multiple medications, it impacts the detectability of LSD. It will either slow down or increase the time needed for metabolizing and eliminating it from the body. 

Amount of Time LSD Needs to take Effect on the body.

Individuals on LSD will feel the effects of it 30 minutes after ingestion of it. Once in the system, the body will feel the full Effect within three hours and begin to decrease and stop after twelve hours. Regardless of its being expelled, a person can have a flashback for at least several days following consumption. 

Known LSD adverse effects commonly experienced involve:

Moreover, individuals on this drug will possibly encounter many sensory distortions and changes in their ability to rationalize. When a considerable dose is taken, the user may become overwhelmed and experience an episode of despair and irrational thinking.

If taken continuously, the user may experience a condition known as HPPD (hallucinations). Although this is a rare condition, it is still capable of causing impairments in overall functions and a tremendous amount of flashbacks.

Necessary Treatment for Addiction

Although not common, impairments can happen following addiction as well as personal problems. It is important to remember that addiction is usually occurring once they begin to feel worried.

Getting the proper help is not as hard as it may seem, and for most, attending inpatient rehab is the best road to recovery. However, before any inpatient program, they should participate in a detox program that can control withdrawal.