Updated on February 15, 2024
5 min read

Can You Overdose on Acid?

Key Takeaways

Can You Overdose on LSD?

You can overdose on D-lysergic acid diethylamide (LSD) or acid if you take large doses of it. The effects will depend on the extent of the overdose. However, acid overdose is rarely fatal.

LSD is a well-known hallucinogenic drug that can cause significant out-of-body experiences. It can also cause long-term psychiatric symptoms. However, LSD is not physically addictive.

The standard dosage for LSD is about 50 to 200 micrograms (μg) and should be administered in a safe setting. For reference, a typical LSD tablet contains 100 to 200 micrograms (μg).


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How Much LSD Is Too Much?

There is limited substance use research indicating exactly how much LSD is too much. Previous studies have estimated the lethal dose of LSD to be 14,000 micrograms (μg). However, recent case studies have disapproved this statement.2 

In one case, a 49-year-old woman mistakenly snorted 55 milligrams (55,000 μg) of LSD, which is 550 times higher than the standard dosage. She blacked out and vomited several times in 12 hours but reported feeling "pleasantly high" for the next 12 hours.3

In another case, a 15-year-old with bipolar disorder ingested about 1,200 micrograms of LSD. Although hospitalized, she later reported significant improvements in her mental health disorder.4

The subjects in both case studies consumed extremely high doses and had no lethal side effects. More research is needed to determine the lethal dosage of LSD and its effects on people with mental illnesses.

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What Causes an LSD Overdose?

An acid overdose (or bad trip) may result from consuming a dose higher than the standard dosage (50 to 200 micrograms). 

Someone who has overdosed on LSD is likely to experience severe hallucinations. Bad trips may cause panic or a feeling of being in danger.5 

Symptoms of an LSD Overdose

There are common and severe symptoms of an LSD overdose.

Common LSD Overdose Symptoms

Common LSD overdose symptoms include:

  • Dry mouth
  • Blurred vision
  • Weakness
  • Dilated pupils
  • Rapid heart rate
  • Excessive sweating
  • Paranoia and visual hallucinations
  • Distorted sense of time
  • Mixed senses
  • Goosebumps
  • Tingling and prickling sensations
  • Tremors and muscle shakes

Severe LSD Overdose Symptoms

Severe LSD overdose symptoms include:

  • Nausea and vomiting
  • Irregular heartbeat
  • Intracranial bleeding
  • Dangerously high blood pressure
  • Blood clotting problems
  • Seizures
  • Coma (rare)

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How to Manage an LSD Overdose

Here are some steps you can take to manage an LSD overdose:

  • Try to move the person to a safe area to prevent self-harm
  • Reassure them that their experience is due to a drug overdose and it will soon wear off
  • Stay with the person, as doing so can calm them down
  • If the situation is too dangerous, get professional help, stay at a safe distance, and protect others

LSD Overdose vs. "Bad Trip:" Are They The Same Thing?  

Although closely related, LSD overdose and "bad trip" do not necessarily mean the same thing.

You may overdose on LSD but not experience psychedelic effects. However, overdosing on LSD has potentially adverse outcomes.

A negative hallucinogenic experience following an LSD overdose characterizes a "bad trip" or acid trip.

Side Effects of A "Bad Trip"

In contrast to some of these seemingly minor symptoms, an acid trip can be very unpleasant. LSD users may suffer terrifying changes in their thoughts and emotions, putting them at risk of harm or even death. 

Adverse outcomes of a bad trip include:

  • Extreme anxiety
  • Panic and paranoia
  • Rapid mood swings
  • Dangerous aggression toward others
  • Self-harm
  • Suicide

What to Do if You or a Friend is Having a Bad Trip

Helping yourself or a friend get through a bad LSD trip may be challenging if you’re inexperienced. The situation can worsen if the person you're trying to help is paranoid and aggressive toward you.

If you're sober, rush the person to a hospital or contact 911 to handle the situation. A hospital can offer a secure environment with continuous monitoring from licensed medical professionals.

Tips for Preventing an LSD Overdose

The following are ways in which you can prevent an LSD overdose:

  • Do not use LSD: Not using the drug is the best way to prevent an overdose
  • Do not take more than the standard dose: (50 to 200 micrograms)
  • Seek emergency medical attention: If you experience terrifying hallucinations, extreme anxiety, nausea, and/or tremors, call 911

What are the Long-Term Effects of LSD?

Despite the fact that LSD is a potent drug capable of producing profound experiences, it is not considered addictive. However, there is evidence that the effects of LSD on brain chemistry may have long-term consequences, including:

  • Hallucinogen persisting perception disorder (HPPD): Also known as "flashbacks," HPPD is characterized by suddenly experiencing the sensations of a previous trip6
  • Serotonin syndrome: Symptoms include diarrhea, restlessness, hallucinations, and seizures
  • Persistent psychosis: Characterized by visual and auditory hallucinations, disorganized thinking, paranoia, and emotional disturbances that persist long after the medication has been discontinued7

These long-term effects may fade with time but may also last for years.

Treatment Options for LSD Abuse

When someone has an acid trip, they may be more likely to seek therapy since the terrifying experience may be a wake-up call. Treatment facilities exist all over the country and have qualified healthcare specialists who provide effective treatment.

Available treatment options for LSD abuse include:

What Does LSD Look Like?

LSD is an odorless, colorless liquid that comes in LSD-soaked paper squares known as blotter papers. Each blotter paper contains a dose of 100 to 200 micrograms (μg). LSD is also available as:

  • Capsules
  • Tablets
  • Sugar cubes

Every LSD product differs in potency depending on the manufacturer. Although LSD is considered safe and nontoxic in standard doses, too much LSD can cause unpleasant experiences.

Note that LSD is an illicit drug and is classified as a Schedule I drug under the Controlled Substances Act (CSA). Schedule I substances also include heroin and MDMA, which have a high potential for abuse and no valid medical use.

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Updated on February 15, 2024
7 sources cited
Updated on February 15, 2024
  1. Lysergic Acid Diethylamide Toxicity,” National Center for Biotechnology Information (NCBI), 7 July 2021
  2. Coma, Hyperthermia and Bleeding Associated with Massive LSD Overdose,” The Western Journal of Medicine, March 1973
  3. A woman took 550 times the usual dose of LSD, with surprisingly positive consequences,” CNN Health, 29 February 2020
  4. LSD Overdoses: Three Case Reports,” Journal of Studies on Alcohol and Drugs, 12 February 2020
  5. Making "bad trips" good: How users of psychedelics narratively transform challenging trips into valuable experiences,” International Journal of Drug Policy, July 2021
  6. Hallucinogen-persisting perception disorder,” National Center for Biotechnology Information (NCBI), October 2012
  7. Clinical features and management of intoxication due to hallucinogenic drugs,” Medical Toxicology Adverse Drug Experiment, 1989

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