Hypnor (Flunitrazepam)

Quick links to important sections

Hypnor (Flunitrazepam)

Treatment option: Insomnia

Medically reviewed

Marina Burgos

Last updated on 10/01/2026

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 Hypnor (Flunitrazepam)

Property Description
Active ingredient Flunitrazepam (INN)
Forms Tablets (Oral), Solution (Parenteral)
Pharmacological class Benzodiazepine, Sedative-Hypnotic
General purpose Rapid, profound sedation and muscle relaxation
Origin Synthetic Compound

What Type of Medicine is Hypnor (Flunitrazepam)?

Hypnor is a powerful, prescription-only medication whose defining active ingredient is the substance Flunitrazepam. This synthetic compound is formally classified by the World Health Organization (WHO) Anatomical Therapeutic Chemical (ATC) system as a Benzodiazepine derivative, specifically identified under code N05CD03. Flunitrazepam is clinically recognized as a potent Central Nervous System (CNS) depressant and a highly effective sedative-hypnotic agent. This official classification underscores the drug's intended function to significantly slow brain activity, often used in scenarios requiring immediate and reliable sedative effects, such as for preoperative medication in hospitalized patients.

Composition and Available Pharmaceutical Forms

The product is a single-ingredient product, containing only the active compound Flunitrazepam alongside necessary non-active components. Flunitrazepam is chemically characterized by a nitro-benzodiazepine structure, a feature that contributes to its high potency compared to many other benzodiazepines. For clinical administration, the drug is available in multiple pharmaceutical preparations, including both oral preparations, such as tablets, and parenteral preparations, which are solutions formulated for injection. Flunitrazepam is characterized by a rapid onset and short to intermediate duration of action. This specific pharmacokinetic profile is a key differentiating factor, indicating that its effect is designed to be felt quickly by the patient before being metabolized.

General Therapeutic Purpose and Intended Effect

The general purpose of this powerful medication is to deliver rapid and profound sedation to the patient, achieving a state of calmness and muscle relaxation. As a potent CNS depressant, the drug's intended action is to quickly mitigate severe states of excessive nervous excitability. This effect allows the body to transition rapidly into a necessary state of deep rest, fulfilling the core therapeutic purpose of a sedative-hypnotic agent. This action involves GABAergic agents and its established role in the potentiation of inhibitory effects within the central nervous system.

What side effects are possible with Hypnor (Flunitrazepam)?

Possible Side Effects and Safety Information

The safety profile of Hypnor (Flunitrazepam), a potent sedative-hypnotic benzodiazepine, is defined by its strong action as a central nervous system (CNS) depressant, as documented in official regulatory classifications. Adverse reactions primarily affect the Nervous System and Psychiatric function.

Key expected effects are generally dose-dependent and include drowsiness, somnolence, dizziness, and impaired motor coordination (ataxia). A significant and specific adverse reaction is anterograde amnesia (memory impairment) [DEA Fact Sheet]. Less common, but documented in the safety literature, are paradoxical reactions such as increased agitation, aggression, and excitability [NIH PubChem].

Serious Safety Characteristics

Official regulatory documents emphasize several severe safety concerns:

  • Dependence and Withdrawal: Both physical and psychological dependence can develop even with short-term therapeutic use. Abrupt cessation may lead to a severe, potentially life-threatening withdrawal syndrome, including seizures and psychosis [ONDCP Fact Sheet].
  • Respiratory Risk: A critical constraint is the potential for severe respiratory depression, which is particularly life-threatening in cases of overdose or when combined with alcohol or other CNS depressants [DEA Fact Sheet].

Population-Specific Constraints

Safety notes include explicit considerations for specific groups. Older adults may be more susceptible to adverse CNS effects like confusion and ataxia. Flunitrazepam is generally contraindicated in pregnancy due to the potential for fetal harm, including the risk of neonatal sedation and muscle flaccidity if used late in gestation [Flunitrazepam - Wikipedia, citing regulatory/clinical data]. The official safety structure requires caution, noting that chronic use necessitates medically supervised discontinuation.

Overdose and Emergency Response

Hypnor (Flunitrazepam) Overdose and When to Seek Help

The following information summarizes the acute toxicity profile of Hypnor (flunitrazepam) as documented in official government regulatory sources. Immediate medical attention is required in the event of a suspected overdose.

Documented Overdose Manifestations

Official documents indicate that an overdose may present with signs of central nervous system (CNS) depression, ranging from excessive sedation to profound coma. Documented physiological effects include impairment of balance and speech, unresponsiveness, slow heart rate (bradycardia), and severe suppression of respiration. Overdose, particularly when involving high doses or co-ingestion, may lead to potentially fatal outcomes.

Required Emergency Actions

The most serious outcomes involve compromised respiratory function. Government regulatory statements emphasize that immediate emergency services must be contacted to manage the overdose. Treatment involves supportive measures to maintain vital functions, especially ensuring a steady heart rate and adequate breathing.

Specific Management

In some cases, the benzodiazepine antagonist flumazenil may be administered as a specific measure. Regulatory guidance warns that flumazenil's use in patients who are physically dependent on the drug can precipitate seizures or withdrawal symptoms and therefore necessitates close clinical monitoring and observation. The risk of severe overdose effects, including death, is significantly increased when Hypnor is combined with other CNS depressant substances, such as alcohol or opioids.

Therapeutic Uses of Hypnor (Flunitrazepam)

What Hypnor (Flunitrazepam) Treats: Main Uses and Benefits

Flunitrazepam is a sedative-hypnotic agent used outside the United States for specific therapeutic applications, focusing on easing symptoms associated with acute symptomatic distress.

The medication is commonly used to address acute or transient episodes of severe insomnia, focusing on difficulty initiating sleep (sleep onset latency) due to significant nervous excitability and mental agitation. It may also assist in easing excessive skeletal muscle tension linked to severe nervous over-activity. In clinical settings, the medication is relevant for managing intense symptoms of pre-procedural agitation and anxiety that occur before medical interventions.

“The medication may assist with moderating distressing manifestations, contributing to a more manageable experience during medical interventions.”

Quick Fact: Symptomatic Support for Acute Distress

This medicine is generally applied in situations requiring short-term symptomatic assistance to address conditions characterized by periods of heightened symptoms, often used during phases when symptoms become disruptive. It is relevant when supportive symptom management is appropriate, contributing to easing the overall symptom load in acute episodes.

Regulatory References

  1. Surgeon General’s Report on Alcohol, Drugs, and Health

Eligibility and Restrictions for Use

Eligibility Map: Who can and cannot use Hypnor (Flunitrazepam)

The official regulatory profile defines patient eligibility based on pre-existing conditions, age, and physiological status.

Category Official Regulatory Stance
Populations allowed Adults; Elderly or debilitated patients (require a mandatory reduced starting dose and monitoring).
Contraindicated Populations Patients with Hypersensitivity to Flunitrazepam, Myasthenia Gravis, Severe Respiratory Insufficiency, Sleep Apnoea Syndrome, Severe Hepatic Insufficiency, Chronic Psychoses, and Phobic or Obsessional States.
Age-Related Rules The paediatric population (under 18 years) is not recommended or formally contraindicated due to insufficient safety data.
Conditional Use Use requires a lower, adjusted dose for patients with Impaired Renal Function or non-severe Impaired Hepatic Function. Special precaution is mandated for individuals with a history of substance abuse or psychiatric disorders.
Pregnancy/Lactation Use is Not Recommended during pregnancy or lactation.

Official Eligibility Statements

  • Flunitrazepam is contraindicated in patients with severe compromise to the respiratory or hepatic systems, and in Myasthenia Gravis.
  • The paediatric population is not recommended due to insufficient data.
  • Elderly patients must be managed with a reduced starting dose under special precaution.
  • Use is not recommended during pregnancy or lactation.

The regulatory documents define eligibility by establishing groups with absolute contraindications based on physiological risk factors. Eligibility is further constrained by age, with the paediatric population being formally excluded and the elderly requiring mandatory dose reduction. The official profile mandates conditional use with special precaution for populations presenting with moderate organ impairment or specific psychiatric risk factors.

What should I know about interactions with other medicines?

Hypnor (Flunitrazepam) Interactions with Other Medicines and Products

The regulatory interaction profile for flunitrazepam is defined by documented constraints concerning co-administration with other substances.

Pharmacodynamic and Substance Interactions

Co-administration with Opioids and other Centrally Acting Depressants (such as antipsychotics, sedative hypnotics, and antidepressant agents) results in Pharmacodynamic Reinforcement. This effect causes an additive central depressive effect that is officially documented as increasing the risk of severe sedation, respiratory depression, coma, and death. The regulatory mandate requires the avoidance of Alcohol (Ethanol), as it similarly enhances these central depressive effects. A documented absorption rate alteration occurs with Cisapride, which may temporarily increase sedative effects.

Clearance and Population Constraints

The profile includes warnings related to Metabolic Clearance Alteration. Inhibition of the drug's primary metabolizing enzymes, CYP3A4 and CYP2C19, is anticipated to reduce clearance, potentially increasing flunitrazepam exposure. Flunitrazepam is formally contraindicated in specific conditions that heighten interaction severity, including Severe Hepatic Insufficiency and Respiratory Depression. The official labeling indicates a reduced dose may be required for patients with impaired liver function or chronic respiratory insufficiency, reflecting the heightened risk in these populations.

Mechanism of Action

How Hypnor (Flunitrazepam) Works — Mechanism of Action

Flunitrazepam acts as a positive allosteric modulator (PAM), targeting the gamma-aminobutyric acid type A (GABA A) receptor complex in the central nervous system (CNS). The drug binds to the benzodiazepine site on the receptor, inducing a conformational change that increases the receptor's sensitivity to the inhibitory neurotransmitter, GABA. This interaction enhances the frequency of the opening of the receptor's central chloride (Cl^-) ion channel.

The resulting influx of Cl^- ions causes hyperpolarization of the postsynaptic neuron, making the cell less responsive to excitatory stimuli and reducing its firing capability. This action produces a widespread potentiation of the GABAergic inhibitory system, leading to reduced neural firing across circuits that modulate alertness, emotional responses, and muscle tone. The resulting suppression of neuronal activity is the basis for core physiological changes, including pronounced sedation, reduction of muscle tone, and anterograde amnesia (the impairment of forming new memories).

Dosage and Administration Information

The administration of flunitrazepam is strictly governed by regulatory guidelines, focusing on short-term application for specific clinical scenarios. The medication is officially available as film-coated tablets for oral intake and as a solution for injection for parenteral (Intramuscular or Intravenous) use, typically reserved for pre-operative and pre-anesthetic settings.

For hypnotic purposes, the tablet is administered once daily and must be taken just before going to bed. The standard starting dose for adults is 0.5 mg to 1 mg. The 1 mg tablet is scored and can be divided to facilitate the required starting dose or for the necessary reduction during discontinuation.

Treatment duration is strictly limited. The course should not exceed the maximum period of four weeks, a limit that includes the tapering off process required when stopping the medication.


Key Dosage and Procedural Instructions

Population Group Starting/Usual Dose Maximum Duration Constraint
Standard Adult 0.5 mg to 1 mg daily 4 weeks (including tapering)
Older Adults 0.5 mg daily 4 weeks (including tapering)
Impaired Function A reduced or individually adjusted dose is required for patients with hepatic or renal impairment. Adherence to short-term limits is mandatory.

The administration protocol requires that treatment is initiated with the lowest dose possible. For hypnotic use, if a dose is remembered before falling asleep, it may be taken; otherwise, the missed dose must be skipped. Use is contraindicated in the pediatric population.

Recent Clinical Evidence

Research Evidence / Overview of Studies for Hypnor (Flunitrazepam)

The research that studied Flunitrazepam comes primarily from randomized controlled trials (RCTs) and systematic reviews, which often structure the research by comparing the compound against the broader class of benzodiazepine hypnotics. This body of work explores the compound's sedative and hypnotic properties, which contribute to the body of evidence regarding its clinical role.


Evidence for Use in Acute, Short-Term Insomnia

Research exploring short-term symptom changes in acute insomnia has been conducted using double-blind crossover trials, where the medication was evaluated with a placebo or other active treatments. The study outcomes examined included measures of sleep onset latency (the time it takes to fall asleep) and total sleep duration. Findings describe patterns observed in the studies where, in the short-term, benzodiazepine agents data show patterns related to measured changes in sleep parameters when compared to placebo groups. Some trials described patterns where patient-reported outcomes describing perceived discomfort were also different in the treated group.

Research on Preoperative and Procedural Sedation

Flunitrazepam was evaluated in randomized, controlled trials where research explored contexts involving pre-procedural anxiety and agitation. Study outcomes examined included scales measuring the levels of sedation and anxiolysis achieved, patient cooperation, and the presence of memory impairment following the procedure. Data show patterns related to the evaluation of moderate sedation, and findings indicate measured differences in patient tolerance compared to control groups. Research also examined temporary physiological measurements related to heart and respiratory rates during the induction of sedation.


Investigation of Cognitive and Next-Day Functional Outcomes

Studies explored the impact of the drug on outcomes reflecting daily functioning or activity level, specifically monitoring cognitive and motor functions. These findings describe patterns observed in the studies related to the measured outcome of a temporary inability to form new memories during the period the compound was observed in the body (anterograde amnesia). Data also show patterns related to residual psychomotor impairment that may persist into the next day. Research describes that patterns observed on functional tests were associated with the administered quantity of the compound.

What Research Gaps and Uncertainty Remain

A primary limitation of the research record is that follow-up durations were limited, meaning that long-term effects are not fully established. Additionally, evidence quality varies across studies, and many of the older trials were subject to heterogeneous methodology. Comparative evidence is lacking against many newer agents introduced since the initial clinical evaluations, meaning the study results reflect the specific conditions under which they were conducted.

Key Studies & References

  1. Meta-analysis of benzodiazepine use in the treatment of insomnia
  2. Long-term use of benzodiazepines in chronic insomnia: a European perspective
  3. High-Dose Benzodiazepine Users' Perceptions and Experiences of Anterograde Amnesia

Frequently Asked Questions (FAQ)

Common questions about Hypnor (Flunitrazepam) (FAQ)

Q: Why do people sometimes call Hypnor a 'date rape drug'?

A: Official government documents note that the drug, under its trade name Rohypnol, has been misused to facilitate criminal acts, including sexual assault. This is because the drug can cause strong sedation, incapacitation, and a type of memory impairment known as anterograde amnesia (impaired memory formation), particularly when combined with alcohol. Regulatory bodies have issued public safety warnings concerning this potential for misuse.

Q: Does Hypnor have a generic version available?

A: Yes, regulatory documents indicate that the active ingredient, flunitrazepam, is marketed under various trade names, including generic preparations, outside of the United States. The availability of specific trade names and generic preparations is determined by the regulatory status in each country.

Q: How long does the effect of Hypnor last in the body?

A: Official drug information describes the effects as persisting for at least 8 hours. The time it takes for the body to eliminate half of the drug (the elimination half-life) is generally stated as ranging between 9 and 25 hours after a single dose. Official drug information indicates that residual effects associated with its half-life may extend into the following day.

Q: Why is Hypnor not available in certain countries like the United States?

A: Flunitrazepam has never been approved for medical use by the U.S. Food and Drug Administration (FDA). Regulatory status in the United States restricts its availability, as the drug is not approved for manufacture or medical distribution by the FDA.

Q: Do older adults typically react differently to Hypnor?

A: Yes, official prescribing information mandates that older or debilitated adults must be managed with a mandatory lower starting dose. This requirement reflects that older adults may have an increased susceptibility to central nervous system effects, such as confusion or impaired coordination, according to official documents.

Q: Is there a risk of becoming dependent on Hypnor?

A: Official safety documents indicate that physical and psychological dependence may develop with the use of flunitrazepam, even when taken for a short duration at therapeutic doses. Documentation notes that if the medication is discontinued, physical dependence can manifest as a severe withdrawal syndrome.

Q: Can Hypnor be detected in a drug test?

A: Yes, flunitrazepam and its key metabolites are detectable in urine samples. Official documents note that metabolites can typically be detected for up to 72 hours after ingestion. Official documents note that the exact period of detection can vary depending on the testing method used and individual patient factors.

Q: Is it normal to feel groggy or 'hungover' the next morning after taking Hypnor?

A: Official safety data includes warnings about residual psychomotor impairment and drowsiness. These effects, which users may describe as 'groggy' or 'hungover,' are recognized residual effects that are often dose-dependent and may persist into the day after administration.

Q: Is Hypnor ever prescribed for conditions other than severe insomnia?

A: The drug's primary indication is the short-term management of severe insomnia. However, the solution for injection is also officially designated for use in pre-operative and pre-anesthetic sedation in hospitalized patients.

Q: What are the documented safety warnings associated with Hypnor?

A: Regulatory documents include mandatory warnings about the significant risks of dependence and withdrawal syndrome, the potential for severe respiratory depression (particularly when combined with other sedating substances), and the risk of anterograde amnesia (impaired memory formation).

Q: Does the body build up a tolerance to Hypnor over time?

A: The official prescribing information indicates that tolerance may develop to the sedative effects of benzodiazepines. This means that the drug’s effectiveness may be reduced over time, and this possibility requires careful monitoring of the patient's response to the drug.

Q: Are there different forms or strengths of Hypnor tablets?

A: Yes, the drug is officially available in multiple pharmaceutical preparations. These include film-coated tablets for oral use, often available in 0.5 mg and 1 mg strengths, and a solution formulated for injection.

Q: Can Hypnor cause changes in mood or behavior?

A: Official safety data documents that less common, paradoxical reactions have been reported with the use of flunitrazepam. These reactions include aggression, agitation, excitability, confusion, and unusual or disturbed behavior.

Q: Is it true that Hypnor is highly regulated?

A: Yes, flunitrazepam is highly regulated internationally, being a controlled substance under the 1971 United Nations Convention on Psychotropic Substances. This classification mandates strict control over its manufacture, possession, and distribution in all countries where it is legally available.

Q: What is the official purpose of the blue or green colored versions of the tablet?

A: Certain manufacturers reformulated the tablets to contain a colorant. When the tablet is dissolved in a liquid, this colorant is intended to dye the drink blue. This change was implemented in response to concerns about the drug's role in facilitating criminal acts.

Q: What serious side effects have been linked to Hypnor use?

A: Serious effects documented in official sources include severe respiratory depression (which can suppress breathing), the potential for coma or death (especially in cases of overdose or combined use), and the risk of developing a severe withdrawal syndrome upon cessation.

Q: What are the typical warnings given to people who are prescribed Hypnor?

A: Mandated patient precautions, as described in official labeling, include warnings regarding the avoidance of alcohol, the avoidance of activities requiring full mental alertness (such as driving or operating heavy equipment), and the documented risk of dependence and withdrawal, even with short-term use.

Q: Can children or adolescents use Hypnor?

A: Official regulatory documents clearly state that the paediatric population, which includes children and adolescents under 18 years, is either formally contraindicated or not recommended for use. This stance is due to insufficient safety and efficacy data for this age group.

Q: Does Hypnor have any specific warnings for people with mental health conditions?

A: The drug is formally contraindicated in patients with specific severe mental health conditions, such as chronic psychoses and phobic or obsessional states. Special precaution is also mandated for individuals with a history of psychiatric disorders.

Q: What are the official clinical trial findings for Hypnor?

A: Research, primarily through randomized controlled trials, examined the drug's effect on measured sleep parameters, such as the time it takes to fall asleep (sleep onset latency) and total sleep duration. The findings described patterns related to measured short-term changes in these sleep outcomes compared to control groups.

Q: What is the legal status of Hypnor possession in different countries?

A: Flunitrazepam is a controlled substance under international treaty. While its manufacture and distribution are banned in the U.S., it is legally available by prescription for medical use in many other countries, reflecting differing national regulations.

Q: Is Hypnor the same as the drug marketed under the name 'Rohypnol'?

A: Yes, Rohypnol is one of the trade names for the active ingredient flunitrazepam. It is a powerful prescription-only medication classified as a benzodiazepine.

Q: Is Hypnor only for sleep problems?

A: The drug is primarily indicated for the short-term management of severe insomnia. However, official information confirms that the solution for injection is also used for pre-operative and pre-anesthetic sedation in hospital settings, meaning it has multiple therapeutic uses.

Q: Is Hypnor the same kind of medicine as Valium or Xanax?

A: Flunitrazepam is classified as a benzodiazepine, which is the same pharmacological class as Valium (diazepam) and Xanax (alprazolam). Medicines in this class all act on the same receptor complex in the brain.

Q: What is the difference between Flunitrazepam and other common sleeping pills?

A: Flunitrazepam has a specific chemical structure that contributes to its high potency, rapid onset of effect, and short to intermediate duration of action. These features are noted in official drug information as key differentiators from some other medicines in its class.

Q: Can you take Hypnor if you are also taking antidepressants?

A: Regulatory documents state that co-administration with antidepressant agents, which are centrally acting depressants, results in pharmacodynamic reinforcement. This means the combination increases the risk of an additive central depressive effect, including severe sedation and respiratory depression.

Q: What is the research evidence about Hypnor's effectiveness for insomnia?

A: Research, primarily through randomized controlled trials, examined outcomes such as the time it takes to fall asleep (sleep onset latency) and total sleep duration. The findings described patterns related to measured short-term changes in these sleep outcomes compared to control groups.

Q: Can Hypnor interact with pain medication?

A: The regulatory profile specifically warns that co-administration with Opioids (a major class of pain medication) results in pharmacodynamic reinforcement. This additive effect significantly increases the risk of severe sedation and respiratory depression.

Q: Is there any research on long-term effects of using Hypnor?

A: Official research overviews explicitly state that a primary limitation is that follow-up durations were limited in the existing studies. This means that the full scope of long-term effects of the drug is not formally established.

Q: Are there studies on Hypnor use during pregnancy or breastfeeding?

A: Official safety information and drug databases note that the drug is not recommended during pregnancy or lactation due to potential risks to the fetus or infant. Data exists regarding the drug's ability to cross the placenta and the concentration found in breast milk.

Q: How long after taking Hypnor is it safe to operate heavy equipment?

A: Official warnings state that the drug may impair physical and mental capabilities, and residual psychomotor impairment may persist into the next day. The duration of impairment is described as lasting at least 8 hours. Official warnings advise avoiding activities that require full mental alertness until the drug’s effects are determined to have completely resolved.

Q: How does Hypnor relate to anxiety or panic disorders?

A: The drug's mechanism of action includes reducing neural firing in circuits that modulate emotional responses. However, its use is formally contraindicated in patients with specific psychological conditions, such as phobic or obsessional states.

Q: Is Hypnor ever used in hospital settings for anesthesia or surgery?

A: Yes, the solution for injection is officially designated for parenteral use (via injection) and is typically reserved for pre-operative and pre-anesthetic settings in a hospital context to induce rapid sedation.

How should Hypnor (Flunitrazepam) be stored and disposed of?

How to Store and Dispose of Flunitrazepam (Hypnor)

The storage and disposal of flunitrazepam must strictly follow regulatory instructions to ensure stability and safety, reflecting its status as a controlled substance.


Storage Conditions

Requirement Official Regulatory Mandate
Temperature Store at a controlled room temperature (e.g., 15 C to 30 C).
Protection Must be protected from light, heat, and moisture.
Container Keep container tightly closed and store in the original container.
Security Must be stored locked up and kept out of the reach of children.

Disposal Instructions

Unused or expired product must be immediately discarded and not stored. Patients are directed to ask a pharmacist or healthcare facility for guidance on how to properly discard the medicine. Disposal of contents and containers must be directed to a hazardous or special waste collection point in accordance with national and local regulations.

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

Available in countries:

Equivalent of Hypnor (Flunitrazepam) found in:

A-Z Index: