
The use of therapeutic agents to induce sleep has a long history, with alcohol, opium, cannabis, valerian, and other ancient herbal remedies being used regularly from antiquity until the 19th century. In the mid-19th century, chloral hydrate was discovered, and barbiturates were developed as sedatives at the turn of the 20th century. Barbiturates were widely used in the 1950s and 1960s and were the first sleeping pills to be prescribed in the 1930s. However, they presented problems with addiction, withdrawal, and overdose toxicity. In the 1970s, benzodiazepines were introduced as safer alternatives and became the most widely prescribed sleeping pills. Despite their benefits, benzodiazepines also carried the risk of substance dependence and overdose.
| Characteristics | Values |
|---|---|
| Original sleeping pills | Alcohol, opium, cannabis, valerian, ancient herbal remedies, chloral hydrate, bromide salts, barbiturates |
| Discovery of chloral hydrate | Mid-19th century |
| Clinical development of barbiturates | Beginning of the 20th century |
| Popular sleeping pills | Methaqualone, Glutethimide |
| First benzodiazepine marketed for sleep | Flurazepam (1970) |
| Major classes of sleeping pills | Barbiturates, benzodiazepines, nonbenzodiazepines (Z drugs) |
| Mechanism of action | Affect the GABA receptor in the brain, slow down the central nervous system |
| Popularity of benzodiazepines | 1970s |
| Brand names | Librium, Valium |
| Side effects | Tolerance, dependence, withdrawal, overdose toxicity, kidney damage, liver damage, heart damage |
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What You'll Learn
- Alcohol, opium, cannabis, and valerian were used to induce sleep
- Chloral hydrate and bromide salts gained popularity in the 19th century
- Barbiturates were the first class of sleeping pills in the early 1900s
- Benzodiazepines were introduced as a safer alternative in the 1970s
- Nonbenzodiazepines are the latest development, with less potential for abuse

Alcohol, opium, cannabis, and valerian were used to induce sleep
Before the advent of modern prescription sleeping pills, various substances were used to induce sleep. Alcohol, opium, cannabis, and valerian were among the commonly used substances to aid sleep.
Alcohol
Alcohol has a long history of being used as a sleep aid. While it may help some people fall asleep initially, it can disrupt sleep later in the night. Additionally, the use of alcohol as a sleep aid can lead to dependence and other health issues.
Opium
Opium is another ancient substance that was used to induce sleep. Opium contains morphine and codeine, which are known for their sedative effects. However, opium use carries a high risk of addiction and overdose.
Cannabis
Cannabis has been used for centuries to help with sleep. It can help reduce the time it takes to fall asleep and improve sleep duration. However, chronic cannabis use can lead to strange dreams and other sleep disturbances upon discontinuation.
Valerian
Valerian is an herb that has been used since ancient times to promote sleep and reduce anxiety. It is often referred to as "nature's Valium." Valerian root contains compounds that act on GABA receptors in the brain, which are responsible for regulating sleep and calming anxious feelings. Studies have shown that valerian can improve sleep quality and reduce anxiety symptoms compared to placebos.
The use of these substances as sleep aids has paved the way for the development of modern sleeping pills. In the mid-19th century, chloral hydrate was discovered, followed by the clinical development of barbiturates as sedatives at the beginning of the 20th century. However, barbiturates presented issues with addiction, withdrawal, and overdose toxicity. Subsequently, benzodiazepines were introduced and became widely popular in the 1970s, offering a "'safer' alternative to barbiturates".
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Chloral hydrate and bromide salts gained popularity in the 19th century
The original sleeping pills can be traced back to the 19th century, when chloral hydrate and bromide salts gained popularity. Chloral hydrate was first used as a soporific in 1869, marking the beginning of the use of medication to treat insomnia. It was discovered in the mid-19th century and was one of the first drugs to be used as a sedative.
Bromides were introduced in 1857 by Sir Charles Locock, an internist and obstetrician. They were initially used to treat women with catamenial or hysteriform epileptic seizures. Locock's treatment proved successful, as 14 out of 15 women in his sample showed positive outcomes. Following this, bromides were widely introduced in asylums and similar institutions across Europe due to their sedative and antiepileptic properties. They were also used to reduce the expression of epileptic patients' sexuality.
In the latter part of the 19th century, other substances such as alcohol, opium, cannabis, valerian, and ancient herbal remedies were also commonly used to induce sleep. However, the risks associated with chloral hydrate, such as dependence, overdose toxicity, and potential damage to the kidneys, heart, and liver, were not yet fully recognized. As a result, it gained popularity as a sleeping aid.
With the discovery of barbiturates at the beginning of the 20th century, chloral hydrate and bromides were gradually replaced. Barbiturates were considered safer alternatives, and their use quickly spread. They became especially popular in the 1950s and 1960s, but their drawbacks, such as addiction, withdrawal, and overdose toxicity, became evident over time.
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Barbiturates were the first class of sleeping pills in the early 1900s
Barbiturates were widely used in the 1950s and 1960s. They were used to treat sleep disorders and were the first truly effective pharmacological tools for the management of epileptic seizures. Barbiturates were also used in intravenous anesthesia, playing a prominent role in anesthetic induction, especially for minor operations.
However, the drawbacks of barbiturates soon became evident. They were found to cause addiction, withdrawal, and overdose toxicity. In New York City alone, there were 8,469 barbiturate overdoses and 1,165 deaths from 1957 to 1963. Marilyn Monroe's fatal overdose involved pentobarbital, a type of barbiturate.
Due to these issues, barbiturates were replaced by benzodiazepines in the 1970s. Benzodiazepines were considered safer and had advantages over barbiturates, including less toxicity in overdose and less interference with REM sleep. Today, barbiturates are typically used only in hospitals for anesthesia and treating seizure disorders.
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Benzodiazepines were introduced as a safer alternative in the 1970s
The original sleeping pills were a range of substances, from alcohol and opium to cannabis, valerian, and other ancient herbal remedies. In the mid-19th century, chloral hydrate was discovered, and barbiturates were developed clinically at the turn of the 20th century. Barbiturates were the first truly effective pharmacological tools for managing epileptic seizures and sleep disorders, as well as playing a prominent role in anesthetic induction. However, they presented problems of addiction, withdrawal, and overdose toxicity.
In the 1970s, benzodiazepines were introduced as a safer alternative to barbiturates and other drugs like glutethimide and methaqualone. The first benzodiazepine marketed specifically for sleep was flurazepam, which became the most widely prescribed sleeping pill within two years. Benzodiazepines were perceived to have many advantages over previous sleep aids. They were less toxic in overdose, and dependence and withdrawal were less likely to occur. They were also considered more benign in terms of sleep recordings, as they had minimal REM reduction, unlike barbiturates and older drugs.
By the 1970s, benzodiazepines had become the most widely prescribed drugs in the world, with Valium and other prescription drugs being popularized through advertising. Middle-class white mothers were particularly over-prescribed benzodiazepines and targeted by pharmaceutical companies. A national survey from the 1970s found that 20% of women had used Valium in the last five years, with 10% reporting regular use. These numbers were twice as high as those for men.
Despite the benefits of benzodiazepines, they are not without their drawbacks. Substance dependence is possible, and deaths from overdoses can occur, especially when combined with alcohol or other depressants. Additionally, questions have been raised about their impact on sleep architecture.
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Nonbenzodiazepines are the latest development, with less potential for abuse
The history of sleeping pills began in the mid-19th century with the discovery of chloral hydrate, which was first used as a soporific in 1869. The clinical development of barbiturates as sedatives at the turn of the 20th century followed this. Barbiturates were widely used in the 1950s and 1960s, with over 2500 barbiturates synthesized and 50 employed clinically. However, their drawbacks, such as tolerance, dependence, and withdrawal, became evident.
In the 1970s, benzodiazepines emerged as a safer alternative to barbiturates. The first benzodiazepine marketed specifically for sleep was flurazepam, which became the most widely prescribed sleeping pill within two years. Benzodiazepines were perceived to have advantages over barbiturates and other drugs, such as reduced toxicity in overdose and less interference with REM sleep. However, benzodiazepines still carried the risk of substance dependence and overdose deaths, especially when combined with alcohol or other depressants.
Nonbenzodiazepines are the latest development in sleeping pills, introduced in the 1990s. They are less toxic than their predecessors, barbiturates, and are believed to have less potential for abuse. However, their comparative efficacy over benzodiazepines has not been established due to the lack of longitudinal studies. Some psychiatrists recommend nonbenzodiazepines, citing research suggesting they are equally potent but less likely to be abused.
Research on nonbenzodiazepines is still evolving, with conflicting findings. Some studies suggest that tolerance to nonbenzodiazepines develops more slowly than with benzodiazepines, while others find little benefit over benzodiazepines. While next-day impairments are minimal, the long-term effectiveness of nonbenzodiazepines in treating insomnia requires further investigation.
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Frequently asked questions
Substances that have been used to aid sleep include alcohol, opium, cannabis, valerian, and other ancient herbal remedies. In the mid-19th century, chloral hydrate and various bromide salts became popular. Barbiturates were then discovered at the beginning of the 20th century and were widely used in the 1950s and 1960s.
Barbiturates were the first class of drugs for sleep disorders and were first introduced in 1904. They were considered safer alternatives to bromides, but issues of addiction, withdrawal, and overdose toxicity emerged.
In the 1970s, benzodiazepines were introduced as a safer alternative to barbiturates and became the most widely prescribed drugs in the world.






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