What Is A Lethal Dose Of Nembutal (Pentobarbital)?

Nembutal is a sedative used to treat short-term insomnia. It’s also used to make people fall asleep pre-surgery, as an emergency treatment for seizures, and for animal euthanasia.

It’s a very powerful drug, and at high doses, it can be fatal. The lethal dose of Nembutal, generic name pentobarbital, is about 30 milligrams per liter (mg/L).

Learn more about the lethal doses of commonly abused drugs.

How A Lethal Dose Of Nembutal (Pentobarbital) Is Determined

Nembutal is a Drug Enforcement Administration (DEA) Schedule II controlled substance. This means the drug has a high potential for abuse and may lead to physical dependence.

It acts as a central nervous system depressant that causes sedation and relaxation.

The lethal dose of Nembutal can range between 2 to 10 grams (g). However, there have been non-lethal cases in which upwards of 20 grams have been ingested. The lethal dose depends on a few factors, such as a person’s tolerance to Nembutal, weight, age, and dosage.

Has Anyone Survived A Lethal Dose Of Nembutal (Pentobarbital)?

If caught early enough and treated immediately by medical professionals, Nembutal overdose is survivable. One 45-year-old man intentionally ingested 20 g of pentobarbital, and though he suffered multiple life-threatening consequences, he survived after a 10-day hospital stay.

In another case, a young male ingested 13 g and lived after a week-long hospital stay.

How Can A Nembutal (Pentobarbital) Overdose Occur?

Fatal overdose on Nembutal is not very common, but it is possible.

This is a habit-forming drug. If a person ingests upwards of 400 milligrams (mg) daily for 90 days, physical dependence will likely form. Withdrawal seizures may happen after taking 600 to 800 mg daily for 35 days.

As tolerance develops in the body, the margin between an intoxicating dose and a fatal dose will become smaller. If taken at high doses, Nembutal can suppress vital organs and bodily functions, such as speech and mobility.

Be Aware Of The Signs Of Nembutal (Pentobarbital) Overdose

If you or someone you care about takes pentobarbital (Nembutal), you need to know the warning signs of taking too much. This medicine can be very dangerous if someone takes more than they should. However, doctors can treat an overdose if they catch it quickly enough and get the person to a hospital right away.

An overdose happens when someone takes too much of the medicine, either by accident or on purpose. When this occurs, the drug can slow down or stop important body functions like breathing and heart rate. Knowing what to look for can help save someone’s life. A Nembutal overdose is treatable with medical detoxification, if it is caught early enough.

Signs of overdose include:

• confusion
• agitation
• drowsiness
• weak pulse
• slowed or stopped breathing
• headaches
• extreme sedation
• rash or large blisters
• kidney failure
• slurred speech
• coma

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If you think someone has taken too much Nembutal, never try to make them throw up. Instead, call 911 or your local poison control center immediately. Getting fast medical help is the most important thing you can do to save their life.

Why Nembutal Is Particularly Dangerous Compared To Other Sedatives

Nembutal is considered more dangerous than many other sedatives because the gap between an intoxicating dose and a fatal one is small. Unlike benzodiazepines, which have a wider safety margin, barbiturates like Nembutal can become lethal at doses only slightly higher than those that cause sedation. As tolerance builds and users take larger amounts to feel the same effects, the risk of accidental overdose increases.

Nembutal is also especially dangerous when combined with alcohol or other depressants, as even moderate amounts of alcohol can turn a typical dose fatal. These risks are a large part of why barbiturates have been largely replaced in medical practice by safer alternatives.

If you or someone you love are facing addiction, you can get help in the form of medical detox, an inpatient rehab program, or outpatient services today. Reach out to an addiction specialist or contact the Substance Abuse and Mental Health Services Administration (SAMHSA) for more helpful information.

Written by the Addiction Resource Editorial Staff