Sialanar

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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 Sialanar

Sialanar is a prescription-only liquid medicine, an oral solution, containing the active substance Glycopyrronium. It's used for the symptomatic management of chronic pathological drooling in children and adolescents.

Property Description
Active ingredient Glycopyrronium bromide
Form Oral solution (liquid)
Pharmacological class Anticholinergic agent, muscarinic antagonist
Common use Management of severe sialorrhoea (chronic pathological drooling)
Origin Synthetic quaternary ammonium compound

What is the Core Identity of Sialanar?

Sialanar is a specific brand of Glycopyrronium bromide supplied as a prescription-only oral solution (liquid). The active component, Glycopyrronium, is a synthetic quaternary ammonium compound that is used for its targeted anticholinergic effects. This substance is classified as an anticholinergic agent, acting as a muscarinic receptor antagonist, and is a single-component drug designed for oral administration. The brand is positioned as a specialist solution for the paediatric population, reflecting its unique liquid form.

What is Sialanar and Glycopyrronium Used For?

The general therapeutic purpose of Sialanar is the symptomatic treatment of severe sialorrhoea, the medical term for chronic pathological drooling. The medicine is authorized for use in children and adolescents aged 3 years and older, particularly those with chronic neurological disorders. Its intended benefit is to reduce the volume of saliva produced, thereby managing the burden of excessive drooling. The pharmacological action reduces both the volume and acidity of secretions, assisting in the control of fluid output.

How is Sialanar Presented and Formulated?

Sialanar is supplied as a clear, colorless oral solution. This liquid presentation, a differentiating factor from other forms of anticholinergics, is a significant feature for facilitating administration. The formulation contains the single active ingredient, Glycopyrronium bromide, dissolved in an aqueous base along with pharmaceutical excipients. The liquid format offers practical advantages, allowing for easy and adaptable administration compared to manipulating solid dosage forms in the target patient group.

Regulatory References

  1. European Medicines Agency (EMA)
  2. NIH PubChem

What side effects are possible with Sialanar?

Possible side effects and safety information

Sialanar's safety profile is defined by effects characteristic of its pharmacological class, an anticholinergic agent. Regulatory documents classify adverse reactions based on frequency and affected body systems, establishing the officially documented risk profile.

The most Very Common (ge 1/10) adverse reaction listed is dry mouth. Other Common (ge 1/100 to < 1/10) effects frequently reported include constipation, urinary retention, vomiting, and nasal dryness. These effects are categorized across different System-Organ Classes (SOCs), notably Gastrointestinal disorders, Eye disorders (such as pupillary dilatation or Mydriasis), and Renal and urinary disorders.

Less frequently reported (Uncommon) effects include tachycardia (increased heart rate), headache, dizziness, insomnia, irritability, and agitation. The official labeling also documents the potential for rare but serious adverse reactions, specifically Acute angle-closure glaucoma and Anaphylactic reaction.

Population-Specific Safety: Due to its mechanism, a specific safety note in regulatory documents concerns the risk of hyperthermia or heat prostration in children and adolescents, particularly in warm environments, due to reduced sweating. Caution is also advised when the medicine is used in patients with renal impairment.

Restrictions for Use: The medicine is contraindicated in specific conditions, including pre-existing glaucoma, severe urinary retention, and severe renal impairment. The safety profile is also restricted when the medicine is taken alongside other drugs that possess strong anticholinergic activity.

Overdose and Emergency Response

Overdose and When to Seek Help

This section outlines the official information provided by regulatory bodies regarding Sialanar (glycopyrronium bromide) overdose and appropriate emergency action. This information is for general awareness and does not substitute for immediate medical consultation.


Urgent Medical Attention Required

If the child has been given too much Sialanar, urgent medical advice must be sought immediately, even if the child appears well or has no immediate symptoms.


Overdose Profile and Clinical Manifestations

Sialanar is an anticholinergic medication. Overdose or errors in dosing are primarily associated with an exaggeration of its intended effects, leading to anticholinergic adverse reactions. Regulatory documentation notes that these effects, which include urinary retention, constipation, and overheating (pyrexia) due to inhibited sweating, may be dose-dependent.

These anticholinergic effects can be particularly difficult to assess in a disabled child, who is the target population for this medication. Other signs of excessive anticholinergic activity can include changes in behavior, irritability, restlessness, overactivity, and increased heart rate.

The carer must stop treatment and seek advice from the prescriber if any of the following occur: constipation, urinary retention, pneumonia, allergic reaction, pyrexia, exposure to very hot weather, or changes in behaviour. Taking action to prevent harmful effects associated with dosing errors or overdose is highly emphasized.

Therapeutic Uses of Sialanar

The use of Sialanar is focused on the symptomatic management of severe sialorrhoea, the medical term for chronic pathological drooling. The medication is generally indicated for children and adolescents aged three years and older whose condition stems from underlying chronic neurological disorders.


Therapeutic Use and Benefits

Sialanar is applied across therapeutic domains where additional symptomatic support is needed for managing unintentional, high-volume saliva loss. The core goal is to address symptoms that may become intense or disruptive, such as symptoms related to inflammatory or irritative states and the functional strain that interferes with routine activities like feeding and speech.

The medication is relevant in clinical settings marked by recurrent or episodic manifestations where supportive symptom management is generally used. It contributes to easing the overall symptom load and supports general well-being during symptomatic phases, assisting with maintaining functional stability.

“Controlling the severity of drooling supports the patient during difficult episodes by easing distress and assists with maintaining functional stability.”

Quick Fact: Relief for Chronic Pathological Drooling

Regulatory References

  1. European Medicines Agency (EMA) public assessment report

Eligibility and Restrictions for Use

Eligibility Scope

Populations for whom use is allowed (as stated in label):

  • Children and adolescents aged 3 years and older with severe sialorrhoea (chronic pathological drooling) due to chronic neurological disorders.

Populations for whom use is contraindicated:

  • A known hypersensitivity to the active substance (glycopyrronium) or any excipient.
  • Patients with glaucoma or urinary retention.
  • Severe renal impairment (eGFR < 30 mL/min/1.73m²), including those requiring dialysis.
  • History of paralytic ileus, pyloric stenosis, severe ulcerative colitis, or myasthenia gravis.

Age-related eligibility rules:

  • The medicine is not recommended for children under 3 years of age or for patients over 65 years, as use has not been sufficiently established in these age groups.

Condition-specific eligibility rules:

  • Pregnancy and lactation status is not recommended for use.
  • Use requires caution in patients with mild to moderate renal impairment (where dose adjustment is required) or pre-existing cardiovascular conditions like cardiac failure or hypertension.

Eligibility Classifications (High-Level)

Official eligibility statements:

  • The medicine is strictly licensed for the pediatric population only.
  • Eligibility is defined by absolute prohibitions (Contraindicated) and conditional use (Caution) as stated in the regulatory documentation.

What should I know about interactions with other medicines?

Sialanar (glycopyrronium) is an anticholinergic medicine, and its interaction profile is primarily defined by this mechanism. Due to the potential for excessive cumulative effects, Sialanar must not be used concomitantly with potassium chloride solid oral dose preparations or with other anticholinergic medicinal products (including certain antidepressants and antihistamines). This combination is contraindicated in regulatory documents due to the increased risk of severe adverse effects, such as urinary retention, constipation, and anticholinergic intoxication syndrome.

Other Relevant Interactions and Constraints

Interacting Product Category Mechanism and Recommendation Severity/Classification
Pro-motility drugs (e.g., domperidone, metoclopramide) Glycopyrronium can antagonize the effects of these agents. Use with caution and monitor patients. Caution
Opioids (e.g., pethidine, codeine) May result in additive central nervous system and gastrointestinal adverse effects, increasing the risk of severe constipation or paralytic ileus. Monitor closely. Caution
Topiramate May potentiate oligohidrosis and hyperthermia, particularly in pediatric patients. Monitor for signs of overheating. Caution

Food Interaction: The administration of Sialanar with food, particularly a high-fat meal, causes a marked decrease in the amount of medicine absorbed into the body. Therefore, the medicine must be taken at least one hour before or at least two hours after meals, or at consistent times relative to food intake.

Mechanism of Action

Peripheral Muscarinic Receptor Blockade

Sialanar's active ingredient, Glycopyrronium, functions as a competitive antagonist across all muscarinic acetylcholine receptor subtypes, primarily targeting the M3 receptors on secretory cells. By binding to these sites, the drug physically blocks the action of the endogenous neurotransmitter Acetylcholine (ACh), thereby suppressing the initial molecular signal required for cellular secretion.


Autonomic Glandular Inhibition and Specificity

This receptor blockade functionally inhibits the excitatory output of the Parasympathetic Autonomic Nervous System (PANS) to the salivary glands. The molecule's quaternary ammonium structure is mechanistically critical as it restricts the compound from readily crossing the Blood-Brain Barrier (BBB). This structural feature concentrates the drug's action in the peripheral nervous system, which contributes to the physiological change of decreased fluid production from the glands.


Reduced Cholinergic Secretomotor Activity

The overall sequence—from molecular antagonism to cellular inhibition—modifies the cholinergic secretomotor pathway, resulting in the systemic physiological change known as antisialagogue action. This targeted pathway interference acts by reducing the intensity of signaling within the cascade at the point of glandular activation.

Dosage and Administration Information

Official Administration Guidelines for Sialanar

Sialanar is an oral solution and its administration must strictly follow the dosing and procedural instructions provided for the medicine. The prescription and initiation of Sialanar are generally managed by physicians experienced in treating pediatric patients with neurological conditions.


Administration and Dosage Rules

Category Instruction Summary
Route of Administration Oral. May be administered directly or via an enteral feeding tube (e.g., NG or PEG).
Dosing Schedule Weight-based and administered three times daily (TID). Dosing begins at a low initial dose (approx 12.8 micrograms/kg glycopyrronium) and is titrated gradually (e.g., in weekly increments) to the minimum effective dose.
Maximum Dose The individual dose must not exceed 64 micrograms/kg of glycopyrronium or 6 mL, whichever is less.
Timing Relative to Food Administer at least one hour before or two hours after a meal. High-fat food should be avoided. Consistent timing with respect to meals is mandatory for reliable absorption.
Special Populations Indicated for patients aged 3 years and older. A dose reduction of 30% is required for patients with mild to moderate renal impairment.

Procedural Instructions

Administration requires the use of a calibrated oral syringe or a suitable measuring device for accurate dosing. The dose volume must be checked by the caregiver prior to each administration. If the medicine is delivered via a feeding tube, the tube should be flushed with 10 mL of water following delivery.

Missed Dose

If a dose is forgotten, the next dose should be taken as scheduled. The missed dose should not be compensated for by doubling the subsequent dose.

Recent Clinical Evidence

Research evidence / Overview of studies for Sialanar

Research Base for Severe Pathological Drooling

The evidence structure includes short-term, randomized, double-blind, placebo-controlled trials (RCTs) used in research exploring how symptoms change over time. These studies were conducted for the management of severe pathological drooling, particularly when was associated with underlying chronic neurological disorders.

Researchers monitored children and adolescents, typically aged 3 years and older, who were experiencing drooling that significantly impacted their daily lives. The majority of individuals enrolled in these trials had a diagnosis of cerebral palsy. Researchers used validated, caregiver-reported measurement tools, such as the modified Teacher’s Drooling Scale (mTDS), to monitor and assess changes in the severity of the drooling and its effect on daily activities. Studies explored short-term symptom changes, with primary observation periods often lasting approximately 8 to 12 weeks. Findings describe patterns observed in the studies related to symptom change over the observation intervals.

Long-Term Follow-up and Sustained Evidence

Research exploring outcomes over defined time intervals involved studies that followed patients for periods longer than the initial controlled trials, typically through non-blinded, open-label extension studies (OLSEs). These extension studies monitored patient-reported outcomes for up to approximately 24 to 36 weeks. The evidence derived from these settings describes how symptoms evolved in the observed populations over these intermediate time intervals.

However, certainty remains low regarding the very long-term effects. The published follow-up durations were limited, and long-term effects are not fully established on continuous use, such as the potential impact on growth or neurodevelopmental outcomes.

Known Gaps and Remaining Research Uncertainties

Scientific literature and regulatory assessments consistently highlight several areas where evidence is limited, contributing to uncertainty in the broader research landscape.

Comparative evidence is lacking from head-to-head randomized trials against other existing pharmacological treatments for sialorrhoea. While the trials included children with various neurological disorders, the data for certain groups remain insufficient, and subgroup findings are uncertain. The results apply only to the populations studied, and evidence quality varies across studies.

Key Studies & References

  1. NICE Guideline NG137: Sialorrhoea (drooling) in children and young people with neurodisability

Frequently Asked Questions (FAQ)

Common questions about Sialanar (FAQ)


Q: Is Sialanar the same as other medicines for drooling?

Sialanar contains the active ingredient glycopyrronium, which is a type of medicine known as a muscarinic antagonist (anticholinergic). According to official product information, it is used for the symptomatic management of chronic pathological drooling. Regulatory documents note that head-to-head trials that directly compare Sialanar against other pharmacological treatments are lacking in the research evidence.


Q: How quickly does Sialanar typically start working?

Information from regulatory reviews and medical literature indicates that the onset of action for oral glycopyrronium is reported to begin within approximately 30 to 40 minutes after administration. The effects are reported to persist for about 8 to 12 hours, which aligns with the frequency of administration described in the official dosing schedule.


Q: Does Sialanar affect sleep or cause drowsiness?

Official regulatory information notes the possibility of drowsiness as an adverse reaction. Additionally, less frequently reported effects may include insomnia (difficulty sleeping) and agitation. The official information notes the existence of these potential central nervous system effects.


Q: What makes Sialanar different from over-the-counter products for excessive saliva?

Sialanar is a specific oral solution that is prescription-only and is licensed for severe pathological drooling in specific patient groups. It is an anticholinergic agent with a targeted mechanism, and its use is subject to medical supervision. Over-the-counter products typically have different ingredients and mechanisms.


Q: Why is Sialanar only available by prescription?

Sialanar is an anticholinergic agent that carries a specific risk profile, including the potential for severe adverse effects like urinary retention and glaucoma in vulnerable patients. Therefore, its management, including initial dose titration (adjustment) based on the patient's weight and response, is subject to medical supervision.


Q: Is Sialanar a steroid or a narcotic?

Sialanar's active component, glycopyrronium, is classified as a muscarinic antagonist (anticholinergic agent). It is described in regulatory documents as a synthetic quaternary ammonium compound. The medicine is not classified as a steroid, nor is it a narcotic substance.


Q: What is the general duration of treatment with Sialanar?

Official regulatory guidance states that the duration of treatment is recommended to be kept as short as possible. This guidance is due to the lack of established long-term safety data for continuous use over many years.


Q: Does Sialanar affect alertness or the ability to drive/operate machinery?

Official safety warnings state that the medicine may cause effects like drowsiness or blurred vision. The regulatory warning states that activities requiring mental alertness, such as driving or operating heavy machinery, should be avoided until the medicine's effect is known.


Q: What are the signs of a serious allergic reaction to Sialanar?

The medicine’s labeling documents the potential for a rare but serious adverse reaction known as an Anaphylactic reaction. General signs of a serious allergic reaction may include skin rash, hives, swelling of the face, lips, tongue, or throat, or breathing difficulty.


Q: Why do official documents mention 'use conditions' for Sialanar?

Administration instructions regarding food timing (e.g., at least one hour before or two hours after a meal) are specific because a high-fat meal causes a marked decrease in the amount of medicine absorbed into the body. This requirement is in place to support reliable absorption.


Q: Can I take Sialanar if I am taking over-the-counter cold medicine?

Official information contains warnings against concomitant use with other anticholinergic drugs, which may include certain cold medicines or antihistamines. This is due to the potential for additive anticholinergic adverse effects, such as increased constipation or urinary retention.


Q: Why do some people experience blurred vision with Sialanar?

Blurred vision is listed as a reported adverse reaction in official product information. This effect is related to the drug’s anticholinergic mechanism, which can cause other eye disorders like pupillary dilatation (Mydriasis).


Q: Does the efficacy of Sialanar change over time?

Clinical studies primarily focus on short-term efficacy, with robust data available for periods up to about 12 weeks. While long-term follow-up data is available, regulatory documents do not contain explicit statements confirming or denying the development of tolerance (diminished effect) during continuous use.


Q: Are there specific warnings about Sialanar and sun exposure?

A specific warning notes the risk of heat prostration (fever and heatstroke), particularly in children and adolescents, if the medicine is used in high or very warm environmental temperatures. This risk is due to the medicine's effect of reduced sweating (oligohidrosis), and official warnings include the recommendation to avoid exposure to high temperatures.


Q: Can Sialanar be taken with common pain relievers like ibuprofen?

Official regulatory documents do not specifically mention non-opioid pain relievers such as ibuprofen. However, the label contains general warnings against co-administering drugs that may result in additive central nervous system or gastrointestinal adverse effects.


Q: How long does the effect of Sialanar last after a dose?

The anticholinergic effects of the oral solution are generally reported in medical literature to last for approximately 8 to 12 hours. This duration aligns with the frequency of administration described in the official dosing schedule.


Q: Does Sialanar have a Black Box Warning from the FDA?

No. According to the FDA documentation, the specific label for the glycopyrrolate oral solution does not contain a Black Box Warning.


Q: Can Sialanar interact with medications for high blood pressure?

Regulatory documents classify the use of Sialanar in patients with pre-existing cardiovascular conditions, such as hypertension (high blood pressure) or cardiac failure, as conditional (Caution). This is because its anticholinergic mechanism may cause effects like tachycardia (increased heart rate).


Q: Can Sialanar be used by someone who has asthma?

Sialanar is an anticholinergic medicine. While the product label does not specifically restrict use based on asthma, regulatory documents classify use in patients with conditions that may be exacerbated by general anticholinergic drug effects as conditional (Caution).


Q: Are there specific instructions for what to do before starting Sialanar?

Regulatory requirements specify that initial patient assessment must check for known contraindications (prohibitions for use), such as glaucoma or severe renal impairment. Monitoring of efficacy and tolerability is also required to be performed periodically by the managing physician.


Q: Does Sialanar have generic versions available?

The active ingredient, Glycopyrronium bromide, is available in various forms and under different brand names. However, Sialanar itself is the specific licensed oral solution product used for severe pathological drooling.


Q: Is Sialanar a controlled substance?

No. The active ingredient, Glycopyrrolate (Glycopyrronium), is not listed as a scheduled controlled substance by the US Drug Enforcement Administration (DEA).


Q: Can Sialanar be used alongside occupational therapy?

Sialanar has been evaluated in clinical trials as a component of treatment in addition to Standard of Care (SOC) management. The SOC management referenced in trials included non-pharmacological therapies such as oral rehabilitation.


Q: Does Sialanar require special monitoring or blood tests?

Regulatory documents state that efficacy and tolerability must be monitored periodically. Due to the anticholinergic mechanism, safety monitoring in clinical trials has sometimes included checking heart rate, blood pressure, and ECG.

How should Sialanar be stored and disposed of?

How to Store and Dispose of Sialanar (Glycopyrronium Oral Solution)

Sialanar oral solution must be stored strictly according to the official regulatory instructions to ensure its quality and stability.

Storage Conditions

  • Temperature: Store the medicine at a temperature below 25°C (77°F).
  • Freezing: The solution must not be frozen.
  • Container: Always keep Sialanar in the original bottle.
  • Child Safety: The medicine must be kept out of the sight and reach of children.

Stability and Disposal

  • Shelf-Life After Opening: Any remaining solution must be discarded 28 days after the bottle is first opened.
  • Disposal: Do not throw away unused or expired Sialanar in wastewater or household waste. Disposal must be carried out according to local requirements, typically by returning the medicine to a pharmacy.

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

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