Armonil

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Medically reviewed

Rosario Oropesa

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 Armonil

What is Armonil? Defining the Medicine and its Class

Property Description
Active Ingredient Melatonin (N-Acetyl-5-methoxytryptamine)
Form Oral Tablet (including prolonged-release)
Pharmacological Class Chronobiotic / Melatonin Receptor Agonist
Common Use Regulation of the sleep-wake cycle
Origin Synthetic (Exogenous)

Armonil is a pharmaceutical product primarily defined by its single active ingredient, melatonin, which is chemically an indoleamine and a tryptamine derivative. Pharmacologically, it is classified as a chronobiotic agent and a Melatonin Receptor Agonist, designated by the ATC code N05CH01. Melatonin's efficacy in addressing timing-related sleep issues is clinically recognized.

Armonil's Composition: A Synthetic Neurohormone

The active substance in Armonil is a synthetic, or exogenous, form of the endogenous neurohormone naturally produced by the pineal gland. Armonil is a preparation commonly provided as an oral tablet and ensures a measurable, standardized delivery of the compound. The formulation is often positioned for patients who experience difficulty with the initiation or maintenance of sleep due to disturbances in their biological clock, such as individuals undergoing shift work or experiencing jet lag. The chemical identity and function of melatonin are well-defined.

General Purpose: Managing the Sleep-Wake Cycle

The essential function of Armonil is to assist in the regulation of the body’s circadian rhythmicity, which governs the sleep-wake cycle. By acting as a chrono-modulator, the medicine reinforces the biological signal that promotes the physiological state of sleepiness and helps facilitate the natural onset of rest. This mechanism is crucial for re-establishing a more stable and synchronized sleep pattern.

Regulatory References

  1. Circadin (melatonin) EPAR

What side effects are possible with Armonil?

Possible Side Effects and Safety Information

The safety profile for Armonil (Melatonin) is formally documented in government regulatory materials, which classify adverse reactions based on their observed frequency and the affected body system. These classifications establish the medicine's official risk profile in real-world clinical use, strictly separated from therapeutic benefits or usage instructions.


Frequency-Classified Adverse Reactions

The most frequently reported adverse effect is somnolence (drowsiness or sleepiness), which is classified as Common (occurring in 1/100 to < 1/10 patients). Effects classified as Uncommon (occurring in 1/1,000 to < 1/100 patients) span several body systems, including Nervous System Disorders (e.g., headache, dizziness, psycho-motor hyperactivity), Gastrointestinal Disorders (e.g., nausea, abdominal pain, dry mouth), and Psychiatric Disorders (e.g., irritability, anxiety, nightmares).

Reactions classified as Rare (occurring in 1/10,000 to < 1/1,000 patients) include symptoms like depression, nervousness, and various dermatological effects (e.g., pruritus, urticaria). The official labeling also notes the potential for Hypersensitivity Reactions, including angioedema, which have a frequency of Not Known (cannot be reliably estimated from available data).


Population-Specific Safety Constraints

Official regulatory documents define specific limitations for use in certain patient groups. Armonil is contraindicated in individuals with severe hepatic impairment due to its metabolic pathway. Furthermore, its use is not recommended in patients with autoimmune diseases or during pregnancy and lactation due to insufficient clinical data in these populations. The regulatory text also advises caution when used in patients with renal impairment.

Overdose and Emergency Response

Overdose and when to seek help

Overdose of Armonil (Melatonin) is primarily characterized by signs of central nervous system (CNS) depression, including excessive drowsiness, prolonged sedation, confusion, and headache. Documented physiological effects include changes to vital signs such as hypotension (low blood pressure) and tachycardia (increased heart rate). Gastrointestinal effects like nausea and vomiting may also be reported.

The official guidance mandates seeking immediate medical attention if severe manifestations occur. These critical signs explicitly include seizures, difficulty breathing, or loss of consciousness (inability to wake up fully). Contacting a poison control center is also a required action in suspected overdose cases.

Treatment is defined as general symptomatic and supportive measures, as regulatory documents state that no specific antidote is known. Supportive management requires continuous monitoring of appropriate vital signs, and procedural steps like immediate gastric lavage may be considered.

Regulatory warnings highlight that pediatric patients represent a population with heightened vulnerability, noting reports of accidental over-ingestion leading to hospitalization and, in rare instances, fatalities. Caution is also advised for patients with pre-existing hepatic impairment due to documented reduced drug clearance.

Therapeutic Uses of Armonil

What Armonil Treats: Main Uses and Benefits

Armonil (Melatonin) is a chronobiotic agent primarily used to provide supportive therapeutic benefits in conditions and clinical scenarios related to the timing and initiation of sleep. It is indicated for use in managing issues where the sleep-wake cycle is disrupted.

Regulating Circadian Rhythm and Functional Stability

The medication is relevant for addressing symptoms that interfere with daily functioning and create noticeable physiological strain. Common indications include the short-term treatment of primary insomnia symptoms, managing disorders where the body's internal clock is misaligned, such as Delayed Sleep-Wake Phase Disorder, and easing acute disruptions like jet lag after trans-meridian travel or sleep problems related to shift work.

Armonil is commonly used to help patients manage the protracted time spent awake before falling asleep, which is relevant for managing symptoms that interfere with daily comfort. This supportive management may be part of symptomatic management that helps ease the overall symptom load. This supports patients during difficult episodes by easing distress and assists with maintaining functional stability during periods of discomfort associated with schedule mismatch.


Quick Fact: Support for Sleep Onset Latency Armonil is commonly used to help patients manage the difficulty associated with falling asleep, which is relevant for managing symptoms that interfere with daily comfort.

Regulatory References

  1. European Medicines Agency

Eligibility and Restrictions for Use

Who Can and Cannot Use Armonil? Official Eligibility Rules

Armonil (Melatonin) eligibility is defined by regulatory agencies based on age, physiological status, and underlying conditions. Use is contraindicated for patients with a known hypersensitivity to the active substance or excipients, including those with certain hereditary conditions like lactose intolerance.

Population Eligibility and Restrictions

Population Group Eligibility Status (Regulatory Labeling)
Older Adults (55+ years) Indicated for primary insomnia treatment.
Children & Adolescents (2-18 years) Restricted Indication for insomnia associated with specific neurodevelopmental disorders (e.g., ASD/SMS).
Pregnant/Breastfeeding Women Not recommended due to a lack of clinical data.
Severe Hepatic/Renal Impairment Not recommended; use requires extreme caution or is prohibited.
Autoimmune Diseases Not recommended; safety data is insufficient.

Use for primary insomnia is not established in the general adult population under 55 years of age. Use may also require caution due to potential drowsiness, which can affect the ability to safely drive or operate machinery, as stipulated in the official prescribing information.

What should I know about interactions with other medicines?

Armonil is a combination medicine containing fluticasone propionate (a corticosteroid) and salmeterol (a long-acting beta2-agonist). Its effectiveness and safety can be altered by interactions with certain other medicines, foods, and supplements.

Major Drug Interactions (Combinations to Avoid)

Avoid use with certain powerful CYP3A4 inhibitors as they can significantly increase the concentration of the fluticasone component in the body. This raises the risk of systemic corticosteroid side effects like adrenal gland suppression or Cushing's syndrome. Examples include:

Drug Type Examples
HIV Protease Inhibitors Ritonavir, Nelfinavir
Azole Antifungals Ketoconazole, Itraconazole

Moderate Drug Interactions (Use with Caution)

Close medical monitoring and dose adjustment may be necessary when Armonil is used with:

  • Beta-Blockers: Including those used for heart conditions or high blood pressure, as they can block the bronchodilator effect of salmeterol and may precipitate bronchospasm.
  • Other Long-Acting Beta2-Agonists (LABAs): Use with other LABA-containing products (e.g., formoterol, olodaterol) is not recommended due to the increased risk of severe cardiovascular side effects.
  • Diuretics: Certain diuretics, especially non-potassium sparing ones, may increase the risk of low blood potassium levels (hypokalemia), which can be worsened by salmeterol.
  • Tricyclic Antidepressants and Monoamine Oxidase Inhibitors (MAOIs): These medications can increase the effect of salmeterol on the cardiovascular system.

Other Interactions

Grapefruit juice can inhibit the metabolism of fluticasone, similar to the major drug inhibitors, and should be avoided. Consult your healthcare provider about all prescription, over-the-counter, herbal, and vitamin supplements you are taking.

Mechanism of Action

How Armonil Works: Mechanism of Action

Targeting Key Neurotransmitter Systems

Armonil acts within the brain by modulating pathways involving the neurotransmitters Dopamine and Noradrenaline. The drug directly targets the Dopamine Transporter (DAT), which is the protein responsible for clearing Dopamine from the synapse. By inhibiting the transporter, the action results in a sustained elevation of Dopamine concentration in the synaptic cleft. This mechanism modifies early molecular steps that shape systemic physiological outcomes within the pathways associated with arousal and locomotion.

Activating the Master Arousal Network

The drug engages mechanisms that influence the activity of specific pathways, specifically the Orexin (Hypocretin) system, a cluster of neurons that function as a central regulator of arousal. This action is synergistic with its effects on monoamines, as it stimulates a fundamental central arousal network. This activation initiates signaling sequences that influence activity associated with homeostatic sleep pressure. The final effect is a generalized increase in sustained central nervous system arousal.

Dosage and Administration Information

How Armonil is Used: Official Administration Principles

Armonil, containing the active substance melatonin, is a pharmaceutical preparation for oral use only. The general administration guidelines are standardized and vary based on the dosage form and intended use. The core principle of administration is the time-relationship to the patient’s sleep schedule, supporting its function as a chronobiotic agent.

Standard Dosage and Frequency

Standard regimens define the usage of specific strengths. For the prolonged-release tablet used in primary insomnia, the standard dose is 2 mg once daily. For short-term treatment of jet-lag, a different regimen using a standard-release tablet is used, typically starting at 3 mg once daily, with a maximum allowed dose of 6 mg.

Contextual Administration Rules

Administration Constraint Application
Timing Relative to Sleep Must be taken 1 to 2 hours before bedtime.
Food Relationship Prolonged-release form must be taken after food. Standard-release form should avoid food 2 hours before and after intake.
Form Integrity Prolonged-release tablets must be swallowed whole; they must not be crushed or chewed.
Time Window Constraint For jet-lag, the dose must be taken no earlier than 20:00 and no later than 04:00 at the destination.

Duration and Population Restrictions

The usage course for Armonil is strictly short-term. For primary insomnia in older adults, the treatment duration is limited to up to thirteen weeks. The course for jet-lag is limited to a maximum of five days. The 2 mg prolonged-release tablet is specifically indicated for patients aged 55 years or over. The medicine is not recommended for use in children, adolescents, or patients with severe hepatic impairment.

Recent Clinical Evidence

Research Evidence / Overview of Studies for Armonil

This section summarizes the official clinical research that has evaluated the medicine's properties evaluated in research related to the sleep-wake cycle, focusing on what was studied, the types of findings reported, and what remains uncertain in the broader scientific landscape.


Evidence for Primary Insomnia in Older Adults (Aged 55 and Over)

The clinical evaluation for using this medicine was evaluated in primary insomnia, relying primarily on short-term Randomized Controlled Trials (RCTs) and systematic reviews. Studies were designed to explore how symptoms change over time. Researchers measured outcomes such as the time taken for participants to fall asleep (Sleep Onset Latency), alongside patient-reported outcomes describing perceived discomfort related to sleep quality in older adults (aged 55 and over).

Studies consistently reported patterns where the measured time to initiate sleep was observed to be shorter in the study group than in the control group. Some studies monitored other outcomes reflecting daily functioning and described patterns where patient-reported scores on sleep quality scales were observed to shift. However, the evidence indicates that the magnitude of the measured changes was often small, and findings related to overall Total Sleep Time were mixed or varied across different trials.


Evidence for Circadian Rhythm Disorders

The research explored the use of this medicine in conditions associated with systemic or functional imbalance of the body's internal clock. The evidence base includes RCTs and specialized chronobiotic studies, which specifically investigate the timing of the sleep-wake cycle in conditions like Delayed Sleep-Wake Phase Disorder (DSWPD). Researchers used biological markers, such as the timing of the Dim Light Melatonin Onset (DLMO), to monitor whether the medicine was associated with a phase shift in the body's rhythm.

Findings indicate that when the medicine was evaluated in DSWPD, studies observed a shift in the circadian phase. This measured shift was often reported in trials that also included a strict sleep-wake schedule. The measured change was observed alongside reports of an earlier time for sleep initiation. Research has explored the medicine’s role in this area, but the measured outcomes were closely linked to the precise timing of administration used in the trials.


Research on Jet Lag Adaptation

The medicine was studied for its use in temporary physiological imbalance following rapid travel across multiple time zones (jet lag). The research base for this indication is substantial, including multiple systematic reviews and meta-analyses of short-term RCTs. These studies monitored acute changes in symptoms, tracking patient-reported jet lag severity, subjective sleep quality, and the number of days required for travelers to feel adjusted to the new time zone.

Research highlights changes measured during the study period. Findings describe patterns where the time required for adaptation to the new time zone was observed to be shorter in the study group compared to control groups. The data show patterns related to patient reports of improved sleep initiation and quality, particularly for travelers crossing five or more time zones. The evidence is limited to short-term, acute use immediately after travel.


Evidence in Specialized Populations

Studies have explored the use of this medicine in populations where sleep difficulties are associated with other health conditions. This includes controlled trials and systematic reviews examining sleep parameters in children and adolescents with neurodevelopmental disorders (such as Autism Spectrum Disorder or ADHD).

These trials monitored outcomes such as Total Sleep Time (TST) and Sleep Onset Latency (SOL). Studies reported how symptoms evolved in the observed populations, with some research describing patterns where an increase in total sleep time and a shorter time to sleep initiation were measured in these specific patient groups. However, the evidence for these groups is characterized by heterogeneity, meaning that the findings were mixed due to the wide variation in the underlying disorders and patient co-morbidities.


Long-Term Evidence and Durability of Study Outcomes

Research has explored outcomes over defined time intervals, with the longest controlled studies typically following adult patients for up to six months. These studies reported that the measured changes observed in the short term were observed to persist over the six-month study period.

However, the scientific community acknowledges that long-term effects are not fully established and there is limited information for outcomes extending beyond six months to one year in controlled settings. Further long-term observational studies are necessary to provide insight into the sustained durability of outcomes.


What Research Gaps and Uncertainty Remain

The evidence highlights what is known — and what is still uncertain. Evidence quality varies across studies, with some trials having modest sample sizes or differing follow-up durations. For the primary insomnia indication, results apply only to the populations studied, meaning the strong findings mainly pertain to the older adult subgroup, leaving data for the general adult population less robust.

Furthermore, a research gap exists in fully understanding the data related to chronic, long-term use for many years, as most randomized controlled studies were limited in duration. Some large-scale observational data have been used in research examining possible associations between prolonged use and long-term systemic outcomes, including certain cardiovascular outcomes. These observational findings only describe group patterns and do not determine a cause-and-effect relationship. Further controlled, prospective research is needed to provide more insight into long-term outcomes.

Key Studies & References

  1. Use of Melatonin and/on Ramelteon for the Treatment of Insomnia in Older Adults: A Systematic Review and Meta-Analysis

Frequently Asked Questions (FAQ)

Common questions about Armonil (FAQ)


Q: Is Armonil the same kind of medicine as [similar generic drug name]?

A: Armonil is defined by its active ingredient, melatonin, which is classified as a Chronobiotic agent. This means it works to regulate the body's natural sleep-wake cycle (circadian rhythm) rather than acting primarily as a sedative. Its specific pharmacological action and classification differ from other types of sleep-related medicines.


Q: Can Armonil be taken with over-the-counter pain relievers?

A: Official information advises exercising caution with any medicines or supplements that may increase the known drowsy-making (sedating) effects of Armonil. Combining them may increase the risk of side effects like dizziness or excessive sleepiness. Consultation with a healthcare provider is generally recommended regarding the use of specific over-the-counter products.


Q: How long does it typically take to start feeling the effects of Armonil?

A: Pharmacokinetic studies, which describe how the body processes the medicine, show that the concentration of the drug generally reaches its highest level in the bloodstream within a few hours after administration. The elimination half-life of melatonin is generally short, typically ranging from 45 to 90 minutes, consistent with the physiological profile of an agent intended to modulate the sleep-wake cycle.


Q: Why is Armonil sometimes mentioned for conditions other than its main use?

A: The medicine has approved indications, such as primary insomnia in older adults and jet lag. However, research has also explored its use in specific patient groups, including children and adolescents with certain neurodevelopmental disorders. These research findings are separate from the main regulatory indications.


Q: What happens if I stop taking Armonil suddenly?

A: Studies have specifically monitored the effects of discontinuing the medicine. These findings generally indicate that signs of withdrawal symptoms or a sudden, severe return of sleep problems (rebound insomnia) are not reported after short-term or moderately long treatment periods.


Q: Does Armonil interact with alcohol?

A: Official guidance indicates that alcohol is generally avoided when using the medicine due to the potential for increased sedating effects. Combining alcohol with Armonil may worsen certain associated side effects, such as dizziness.


Q: Is Armonil available as a generic medicine?

A: Armonil is the brand name for a pharmaceutical preparation containing the active substance melatonin. While melatonin is widely available as an unregulated dietary supplement, the specific prescription formulation of Armonil is authorized for therapeutic use with regulated manufacturing and purity standards.


Q: Is Armonil habit-forming or addictive?

A: Based on clinical trials and regulatory data, there is generally a low likelihood of becoming dependent on Armonil. The medicine's mechanism of action, which involves modulating the natural sleep-wake hormone, differs from treatments associated with dependency risk.


Q: What is the difference between Armonil and other treatments for the same condition?

A: Armonil is classified as a chronobiotic, which means it works by mimicking the natural hormone melatonin. Its primary action is to help regulate the body's internal clock (circadian rhythm) by binding to specific receptors. This mechanism is distinct from traditional sedative-hypnotic drugs, which primarily induce sedation.


Q: Does Armonil affect blood pressure?

A: Official adverse reaction reports classify hypertension (high blood pressure) as an uncommon adverse reaction associated with the use of the medicine. This is a potential effect that has been reported in rare cases during post-marketing surveillance.


Q: What should I do if I miss a dose of Armonil?

A: Official patient information describes that if a dose is missed, an extra dose is generally not taken to compensate. The recommended regimen is typically resumed with the next scheduled dose.


Q: Is Armonil a controlled substance?

A: The active ingredient in Armonil, melatonin, is not classified as a controlled substance by regulatory bodies like the U.S. Drug Enforcement Administration (DEA).


Q: Does Armonil interact with birth control pills?

A: Studies indicate that certain oral contraceptives may potentially increase the natural levels of melatonin already present in the body. Taking these together with Armonil may increase the risk of experiencing certain side effects, such as dizziness or excessive drowsiness.


Q: Are there gender differences in how Armonil works or causes side effects?

A: Clinical trial data have been reviewed to look for differences in how the medicine affects male and female patients. These reports indicate that no significant differences in the overall safety profile or effect profile were observed between male and female patients in the studied populations.


Q: How quickly does Armonil leave the body?

A: Based on pharmacokinetics (how the body processes the drug), the clearance of the active substance from the body is generally expected to be complete within approximately 12 hours after ingestion of the prolonged-release tablet.


Q: Is Armonil a prescription drug?

A: The specific pharmaceutical product (Armonil) that has been studied and authorized for therapeutic use, such as the prolonged-release 2 mg tablet, is generally supplied as a prescription-only medicine in authorized markets.


Q: How is the safety of Armonil monitored after it has been approved?

A: Like all approved medicines, the safety profile of Armonil is continually monitored after approval through post-marketing surveillance studies. This system tracks the occurrence of adverse events once the drug is used by the wider public to identify any new safety concerns.


Q: What does 'pharmacokinetics' mean in relation to Armonil?

A: Pharmacokinetics is the medical term that describes how the body manages the medicine over time. Specifically, it details the process of how Armonil is absorbed, distributed throughout the body, metabolized (broken down, largely by certain liver enzymes), and finally excreted (cleared) from the system.


Q: Why does the official document mention Armonil's effect on heart rhythm?

A: Official adverse reaction reports have included palpitations (a type of sensation related to heart rhythm) in the post-marketing surveillance phase. These reports are classified as uncommon side effects that have been reported by patients using the medicine.


Q: What are the known severe side effects of Armonil?

A: Official documents note that serious hypersensitivity reactions have been reported, although the frequency is not known. These can include swelling of the face, tongue, or throat (known as angioedema) and are classified as serious events in the product labeling.

How should Armonil be stored and disposed of?

How to Store and Dispose of Armonil (Melatonin)

Official regulations require specific storage conditions for Armonil tablets to maintain their stability and efficacy.


Storage Requirements

Condition Requirement
Temperature Store in a cool dry place; do not store above 30 C.
Protection Keep in the original blister pack to protect the medicine from light, heat, and moisture.
Child Safety Must be kept out of the sight and reach of children.

Disposal Instructions

Do not throw away unused or expired Armonil via wastewater or household waste. Consult a pharmacist for guidance on proper disposal, which must be performed in accordance with local regulatory requirements for pharmaceutical waste.

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

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