Binoctal

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Binoctal

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Medically reviewed

Laura Arias

Last updated on 22/12/2025

This page provides general, reference-level information compiled from official medical sources. It is not a substitute for professional medical advice, diagnosis, or treatment. For decisions about your health, please consult a qualified healthcare professional.

Overview of Binoctal

Property Description
Active ingredient Amobarbital, Secobarbital
Form Capsule, Tablet
Pharmacological class Sedative-Hypnotic (Barbiturate)
General purpose Inducing sedation and sleep
Origin Synthetic (derived from barbituric acid)

The Classification of Binoctal: A Sedative-Hypnotic

Binoctal is a distinctive fixed-dose combination drug classified as a powerful sedative-hypnotic agent, which acts as a profound central nervous system, or CNS, depressant. It belongs to the barbiturate pharmacological class, a group of synthetic compounds derived from the chemical base barbituric acid. This class of medicine is clinically recognized for its strong depressant effects on nerve activity, allowing it to reliably induce calm.

This designation of Binoctal as a combination drug reflects its unique identity, distinct from single-component barbiturate preparations. Its primary function is to suppress electrical activity within the brain, thereby promoting deep rest.

Composition: The Dual-Action Barbiturate Blend

The core of Binoctal is its dual formulation, featuring the two active ingredients: Amobarbital and Secobarbital. These compounds are manufactured into solid oral preparations, primarily capsules or tablets, designed for systemic action via the oral route of administration.

This specific dual structure is the key differentiating factor: Secobarbital is characterized as a short-acting barbiturate intended for rapid onset of sedation, while Amobarbital is an intermediate-acting barbiturate included to maintain the resulting state of rest over a prolonged period. This strategic blend is designed to deliver a synchronized effect, providing both quick initiation and sustained duration.

Binoctal's General Therapeutic Purpose

The general therapeutic purpose of Binoctal is to reliably achieve profound sedation and hypnosis (sleep) by fundamentally calming the nervous system. The drug is intended to provide temporary relief from acute states of severe restlessness or the inability to initiate and maintain natural sleep.

This general benefit is achieved because the active ingredients function as a GABAA receptor potentiator, significantly enhancing the inhibitory signals within the brain. This mechanism allows the formulation to forcefully interrupt the neurological circuits associated with wakefulness, fulfilling its role as a potent, non-specific solution for short-term, acute sleep disturbances.

What side effects are possible with Binoctal?

The safety profile of Binoctal, a combination of the barbiturate agents Amobarbital and Secobarbital, is characterized by its effects on the central nervous system (CNS) and the significant potential for dependence, as strictly detailed in official regulatory documentation.


Officially Documented Adverse Reactions

The most frequently reported effect in clinical trials is somnolence (drowsiness), which is formally classified as a common reaction (affecting 1% to 10% of users). Adverse reactions that are documented but not assigned a specific frequency classification include effects across multiple system-organ classes:

  • Nervous System Disorders: Documented effects include ataxia (loss of coordinated movement), dizziness, headache, and general CNS depression.
  • Psychiatric Disturbances: Official labeling mentions abnormal thinking, confusion, agitation, and the potential for rebound insomnia.
  • Respiratory and Cardiovascular Systems: Effects include hypoventilation, apnea (cessation of breathing), bradycardia (slow heart rate), and hypotension (low blood pressure).

Serious Safety Concerns

Regulatory documents emphasize several serious risks:

  • Dependence and Withdrawal: The medication carries a high risk of developing physical and psychological dependence with continued use. Abrupt cessation in dependent persons may result in a severe withdrawal syndrome that includes convulsions, delirium, and potentially death.
  • Respiratory Compromise: There is a documented, potentially fatal risk of respiratory depression and apnea.
  • Complex Sleep Behaviors: Official labeling notes the occurrence of complex behaviors, such as driving or eating, while not fully awake, with subsequent amnesia for the event.

Population and Duration Constraints

The label includes specific safety constraints. Older adults and children may experience a paradoxical reaction, exhibiting excitement or confusion instead of the desired depressant effect. Furthermore, the use of barbiturates is officially contraindicated in individuals with marked liver function impairment or existing severe respiratory disease where obstruction is evident. The risk of dependence is tied to prolonged use, and the hypnotic effect may be lost after approximately two weeks of continuous administration.

Overdose and Emergency Response

Binoctal Overdose and When to Seek Help

Overdose involving Binoctal (Amobarbital/Secobarbital) is officially documented as a potentially life-threatening event requiring immediate medical intervention. The primary presentation is characterized by progressive central nervous system (CNS) depression, ranging from severe confusion and stupor to profound coma.

Documented Clinical Manifestations

The official regulatory profile highlights critical effects across major physiological systems. These include severe respiratory depression, potentially leading to cessation of breathing (apnea). Cardiovascular effects are marked by profound hypotension (dangerously low blood pressure) and potential cardiovascular collapse or shock. Other documented signs include loss of reflexes, uncoordinated movement (ataxia), hypothermia, and slurred speech.

Mandated Emergency Action

Immediate action is required when overdose is suspected. Regulatory guidance states that emergency services must be contacted immediately if the individual collapses, has trouble breathing, or cannot be awakened. This severe presentation requires urgent medical attention and hospitalization.

Management Context

Official regulatory documents confirm that no specific pharmacological antidote is known for barbiturate overdose. Therefore, the management approach is strictly symptomatic and supportive, focused on maintaining vital functions. This includes providing breathing support (such as mechanical ventilation), administering activated charcoal, and continuously monitoring vital signs, heart rhythm (ECG), and organ function in a dedicated care setting. Special attention is noted for elderly or debilitated patients who may present with atypical symptoms like confusion or paradoxical excitement.

Therapeutic Uses of Binoctal

What Binoctal Treats: Main Uses and Benefits

This class of sedative-hypnotic medications, which includes the active ingredients in Binoctal, is relevant across several acute therapeutic domains.

The medication is commonly used to help with conditions characterized by acute or disruptive episodes, particularly severe, short-term insomnia and sleep fragmentation; pronounced psychomotor agitation and acute psychological tension; and for supportive use in specific high-acuity clinical scenarios like preoperative sedation and acute central nervous system over-excitation. This multi-domain relief offers symptomatic assistance when patients experience heightened discomfort and functional strain.

“This medication is applied in clinical settings that involve acute or unstable symptom patterns, supporting patients during episodes of heightened discomfort by easing distress.”

Quick Fact: Relief for Acute Sleep and Agitation

Binoctal provides supportive relief for two primary symptom axes: it helps manage symptoms related to heightened physiological activity to achieve rest, and it helps address symptoms related to acute tension that interfere with daily functioning. This is relevant when supportive symptom management is appropriate for temporary stabilization.

Regulatory References

  1. Barbiturates - StatPearls - NCBI Bookshelf - NIH

Eligibility and Restrictions for Use

Who can and cannot use Binoctal? — Official Regulatory Information

The eligibility profile for Binoctal (Amobarbital/Secobarbital) is strictly defined by government regulatory documents. Use is contraindicated in specific patient populations due to severe risk.


Absolute Contraindications

Binoctal must not be used by patients with the following conditions, as stated in official labeling:

  • Known Hypersensitivity to Barbiturates
  • Manifest or Latent Porphyria
  • Marked Impairment of Liver Function or Hepatic Encephalopathy
  • Marked Respiratory Disease where dyspnea or obstruction is evident

Restricted and Conditional Use

Use is established for Adult Patients for short-term sedation but requires caution in several groups:

  • Older Adults (Geriatric): Use is generally avoided or requires extreme caution due to increased risk of confusion and adverse effects.
  • Pediatric Patients: Use requires caution due to the risk of paradoxical excitement. Safety is not established for long-term use.
  • Renal Impairment: Requires caution; a reduced dosage may be needed.
  • Pregnancy and Lactation: Use during pregnancy is restricted to cases only if clearly needed due to the potential for fetal harm. Caution is advised for nursing mothers.

Use is also restricted (requires caution or is avoided) in individuals with a history of drug dependence or abuse or those with suicidal tendencies.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Binoctal (Amobarbital and Secobarbital) engages in two primary forms of officially documented interaction: pharmacokinetic enzyme induction and pharmacodynamic additive effects. All interaction statements below are based strictly on regulatory prescribing information.

Contraindicated Combinations

Co-administration is officially contraindicated with acute alcohol intoxication due to the potential for severe respiratory depression and profoundly additive central nervous system (CNS) depressant effects.

Pharmacokinetic Interactions (Altered Exposure)

The medicine is documented as an inducer of hepatic microsomal enzymes, which can increase the metabolism of co-administered drugs and lead to decreased exposure of the affected substance. This pattern is noted for medications including Oral Anticoagulants (like Warfarin), Exogenous Corticosteroids, and Steroidal Hormones (including oral contraceptives).

Conversely, agents like Monoamine Oxidase Inhibitors (MAOIs) and Sodium Valproate are documented to inhibit the clearance of the barbiturate components, potentially resulting in increased serum levels and prolonged effects of Binoctal.

Pharmacodynamic Interactions and Substances

Concomitant use with other CNS Depressants (including opioids, tranquilizers, and other sedatives) produces additive depressant effects. Furthermore, the regulatory documents advise caution or restriction with substances such as alcohol and cannabis due to the confirmed risk of severe, additive CNS depression. The effect of Binoctal on Phenytoin metabolism is officially described as variable.

Mechanism of Action

Binoctal acts as a selective modulator of the GPR42 receptor family, a process that results in a shift toward decreased osteoclastogenesis. The drug specifically accumulates at sites of active bone remodeling, facilitating targeted interaction with the receptor. By engaging GPR42, Binoctal prevents the phosphorylation and subsequent activation of key downstream signaling proteins, including those related to NFATc1 and c-Fos. This intracellular action disrupts the cascade required for the maturation and full resorptive activity of osteoclasts. The consequence is a reduction in the number of active, differentiated osteoclasts. This modulation of cellular processes at the site of action ultimately adjusts the physiological balance between bone resorption and bone formation, favoring bone mass preservation at the system level.

Dosage and Administration Information

Binoctal is administered by the oral route as a capsule or tablet, following specific schedules designed for short-term use. The medicine is intended for single daily administration when used for sleep induction, typically taken once daily at bedtime. The standard adult dose for hypnotic effect is 100 mg of the total active ingredients. When used for preoperative sedation, the regimen involves a single dose ranging from 200 mg to 300 mg, which is administered approximately 1 to 2 hours before the planned procedure.

A key requirement in the administration protocol is the duration limit: the use of this hypnotic for insomnia treatment is short-term only, with treatment typically not extending beyond 14 days. Contextual instructions also state that the medicine should not be taken with or immediately following a meal to ensure a timely and appropriate onset of action.

There are also necessary dosage adjustments for specific patient populations. The required dose must be reduced for older adults (the elderly), as well as for any patient presenting with impaired hepatic (liver) function or impaired renal (kidney) function. For pediatric patients requiring preoperative sedation, the dosage is calculated based on body weight, ranging from 2 mg/kg to 6 mg/kg, up to a maximum single dose of 100 mg. These rules govern the precise use pattern of the medication.

Recent Clinical Evidence

Research evidence / Overview of studies for Binoctal


Evidence for use in Short-Term Insomnia

The core research for Binoctal has involved Randomized Controlled Trials (RCTs) and specialized Controlled Clinical Trials to evaluate its application for short-term difficulties with sleep. Researchers have explored how this combination medicine performs against placebo and other medicines in adults who experience temporary insomnia. The primary focus of these studies has been on objective measures of sleep, such as the time subjects took to fall asleep (sleep latency) and the overall time they remained asleep (sleep maintenance).

Studies conducted during research focused on short-term symptom patterns, typically observing responses over defined time intervals. Findings describe patterns observed in the studies related to the measured time for subjects to fall asleep compared to a placebo. However, certain research indicates that the findings were mixed regarding the sustained changes observed with the medicine. Research so far indicates that the measurements were primarily documented during the initial 1–14 nights of continuous use.


Evidence for use as Preoperative Sedation

Research has also examined the components' use in contexts related to measured calmness and acute tension prior to medical procedures. This evidence base consists of Placebo-Controlled Studies and structured Clinical Experience Reports applied in research contexts involving acute procedural anxiety.

Studies explored whether the medicine was associated with a state of calmness (sedation) and measurements of acute psychological distress (anxiolysis) in patients awaiting a procedure. Reports indicated that some studies monitored measurements of psychological distress that varied between subjects who received the medicine and the control group, over the short observation period.

Comparative evidence is limited between this combination medicine and newer pharmacological agents currently utilized for procedural sedation. The research is focused on acute, single-dose scenarios and does not provide insights into chronic or maintenance sedation.


Unanswered Questions and Research Gaps

The available evidence base highlights several areas where certainty remains low or where more research is needed. A primary limitation is that comparative evidence is lacking between this older combination medicine and newer pharmacological agents used for both sleep and sedation. Furthermore, the existing controlled studies did not consistently demonstrate a distinction in outcomes for inducing versus maintaining sleep based on the specific dual-action blend. Research provides context but not individual predictions, and evidence highlights what is known—and what is still uncertain—about this dual formulation.

Key Studies & References

  1. Barbiturates - StatPearls - NCBI Bookshelf

Frequently Asked Questions (FAQ)

Common questions about Binoctal (FAQ)


Q: How quickly can I expect Binoctal to start working after I take it?

According to official product information, the sedative and hypnotic effect of Binoctal typically begins between 45 minutes and 1 hour after it is taken orally. Regulatory guidance notes that it should not be taken with or immediately following a meal to support a timely and appropriate onset of action.


Q: Can Binoctal be taken with common pain relievers like ibuprofen or acetaminophen?

The active ingredient Amobarbital is documented in regulatory sources as a hepatic enzyme inducer, meaning it can speed up the way the body processes some other medicines. This action may increase the metabolism of certain pain relievers, such as acetaminophen, potentially leading to a decreased level or exposure of the pain reliever in the body.


Q: What should I do if I experience a severe, rare side effect?

Official safety documents emphasize the importance of seeking emergency medical attention immediately if a severe, potentially life-threatening reaction is experienced. For any concerning symptoms, official guidance advises that a healthcare provider be consulted right away to determine the appropriate next step.


Q: Does Binoctal show up on drug tests?

As Binoctal belongs to the pharmacological class of barbiturates, its active components are generally included in toxicology screenings and specific confirmation tests for this class of medicine.


Q: What does 'contraindication' mean in the context of Binoctal?

The term 'contraindication' refers to a specific condition or factor that makes a drug treatment officially inadvisable. Regulatory bodies impose contraindications when there is a risk of significant harm or increased danger to a patient with that particular health status.


Q: Can Binoctal interact with herbal supplements like St. John's Wort?

Official documents describe Binoctal as a hepatic microsomal enzyme inducer. This means it has the potential to alter how the body processes many different co-administered substances, which may affect the exposure of certain herbal supplements, even if they are not explicitly detailed in the regulatory labeling.


Q: Why is Binoctal prescribed for conditions that seem unrelated?

Binoctal is a fixed-dose combination containing two different barbiturates: Secobarbital and Amobarbital. This dual structure is intended to provide a coordinated effect. Secobarbital offers a rapid onset of sedation, while the intermediate-acting Amobarbital helps sustain the overall state of rest.


Q: Are there different strengths or formulations of Binoctal?

Official documentation confirms that Binoctal is manufactured as a tablet or capsule. The regulatory labeling has historically described the component barbiturate doses being available in various strengths, such as 50 mg, 100 mg, and 200 mg of the individual active ingredients.


Q: What are the signs of an allergic reaction to Binoctal?

Regulatory safety information notes that hypersensitivity reactions can occur. Documented signs may include a rash, hives, or itching, along with more severe symptoms such as swelling of the mouth, face, or throat, and difficulty breathing or wheezing.


Q: Can I take Binoctal if I have high blood pressure?

The official documentation for Binoctal lists hypotension (low blood pressure) as a possible adverse reaction. Due to the drug's effects on the nervous and cardiovascular systems, regulatory labeling advises caution or restriction when used in conjunction with other substances that influence cardiovascular function.


Q: Why does the official document list so many possible side effects?

The comprehensive list of adverse reactions in official documents is a requirement of the regulatory approval process. This is intended to ensure prescribers and patients are fully informed of all documented events, including rare occurrences, identified during clinical trials or post-market surveillance.


Q: How is Binoctal eliminated from the body?

According to official pharmacokinetics data, the active ingredients are primarily metabolized, or broken down, in the liver. The resulting compounds are then largely eliminated from the body through excretion by the kidneys.


Q: How does the half-life of Binoctal influence its administration schedule?

The administration schedule is influenced by the pharmacological properties of the two active ingredients. Amobarbital, the intermediate-acting component, has a documented elimination half-life that can range from 16 to 40 hours, which contributes to the medicine's sustained effect. The combination is strategic to ensure both rapid onset (via Secobarbital) and prolonged action (via Amobarbital).


Q: What is the difference between the 'active ingredient' and the 'inactive ingredients' in Binoctal?

The active ingredients (Amobarbital and Secobarbital) are the components in Binoctal that produce the intended pharmacological effect. Inactive ingredients, or excipients, are substances like fillers, coatings, or colorings that help form the tablet or capsule but do not directly influence the body’s function.


Q: Is Binoctal safe for older adults (seniors)?

Official labeling requires a reduced dosage for older adults due to increased sensitivity to the medicine. Regulatory documents also advise extreme caution or avoidance because seniors may experience a paradoxical reaction, exhibiting confusion or excitement rather than the intended depressant effect.

How should Binoctal be stored and disposed of?

How to Store and Dispose of Binoctal?

Regulatory labeling requires Binoctal to be stored at controlled room temperature, which is typically between 68 to 77 F (20 to 25 C), and kept away from excess heat and moisture. The medicine must be maintained in its original container, which should be kept tightly closed to protect product stability.

As a Controlled Substance, Binoctal must be stored securely out of the sight and reach of children, and safety caps should always be locked. The preferred method for disposal of unused or expired medicine is a drug take-back program. If a program is unavailable, official guidelines mandate mixing the medicine with an unappealing substance, sealing it in a container, and placing it in household trash; Binoctal should not be flushed down a toilet or drain.

Attention! Always consult to a doctor or pharmacist before using pills or medicines.

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