Amandine

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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 Amandine

Property Description
Active ingredient Amantadine Hydrochloride
Form Capsules, tablets, or syrup (Oral Administration)
Pharmacological class Dopaminergic agent, NMDA receptor antagonist
Common use General neurological stabilization; historical antiviral
Origin Synthetic tricyclic amine

1. The Composition and Identity of Amandine

Amandine is a medicine defined by its primary active ingredient, Amantadine Hydrochloride, which is structurally classified as a synthetic tricyclic amine compound. This substance is chemically derived from the rigid adamantane structure and is prepared as a single-ingredient product, containing only Amantadine as the therapeutic component. This formulation is recognized for its systemic effect, delivered via common oral administration forms such as capsules, tablets, or syrup. Unlike some other neurological drugs, Amandine's distinct chemical framework provides a unique scaffold that enables its distinctive dual action.

2. Pharmacological Classification and Dual Action

Pharmacologically, Amandine possesses a distinct, dual classification, functioning primarily as both a dopaminergic agent and an N-methyl-D-aspartate (NMDA) receptor antagonist. This dual nature places the compound within the neurological therapeutic category, a classification associated with its use for central nervous system activities. The fact that the compound simultaneously influences the release of a key neurotransmitter and modulates receptor-mediated nerve impulses sets it apart from agents that target only one pathway.

3. General Purpose in Neurological and Viral Contexts

The overarching purpose of Amandine's effect is to help restore chemical balance within the central nervous system, thereby generally contributing to the stabilization of motor control. This is achieved by enhancing dopamine availability and modulating nerve impulses, which can help to reduce physical rigidity and temper involuntary motions, a functional use documented in medical monographs. The compound is classified for its effects on the central nervous system and historical applications. Furthermore, its original classification is tied to its capacity to interfere with the replication process of specific influenza A virus strains, defining its identity as a versatile therapeutic compound.

Regulatory References

  1. Amantadine Hydrochloride NCI Definition

What side effects are possible with Amandine?

Possible side effects and safety information

The official safety profile for Amandine, as documented in regulatory sources, organizes potential adverse reactions according to the body system affected and their reported frequency in clinical studies. This classification helps define the medicine’s risk structure, distinguishing between common and rare outcomes.

Documented Adverse Reactions and Frequencies

Adverse reactions are formally grouped by System-Organ Class (SOC) in official documents. Effects commonly reported include those related to the Gastrointestinal System (e.g., nausea, dry mouth, constipation) and Nervous System Disorders (e.g., dizziness, insomnia, lightheadedness). Common effects affecting the skin and circulation may include Livedo reticularis (skin discoloration) and peripheral edema (swelling).

Serious Safety Considerations

Regulatory information identifies certain reactions as serious or rare but clinically significant. These include severe Psychiatric Disorders, such as hallucinations, psychotic reactions, and documented instances of suicidal ideation. Specific safety concerns also extend to Cardiac Disorders, where rare but serious outcomes like cardiac arrhythmias (including Torsade de pointes) are noted. Additionally, the development of Neuroleptic Malignant Syndrome (NMS) is a documented risk, particularly associated with abrupt dose reduction or withdrawal.

Population-Specific Safety Notes

The official safety label provides specific considerations for certain patient groups. Individuals with renal impairment are noted to be at increased risk of drug accumulation and toxicity. Older adults may have heightened susceptibility to central nervous system effects, such as confusion. Caution is officially advised for patients with a pre-existing history of heart disease or psychiatric disorders.

Overdose and Emergency Response

Overdose and when to seek help

The official regulatory documents define the overdose profile of Amandine (Amantadine Hydrochloride) by documenting severe, systemic toxicity involving the central nervous and cardiovascular systems.

Documented Manifestations and Severe Outcomes

Overdose manifestations officially documented in regulatory prescribing information range from signs of CNS excitation, including agitation, confusion, visual hallucinations, and seizures, to symptoms of CNS depression, such as stupor and coma. Life-threatening outcomes that have been formally documented include serious ventricular arrhythmias, cardiac arrest, and acute respiratory distress syndrome (ARDS). Cardiovascular findings may include sinus tachycardia and hypertension.

Emergency Action Required

Due to the risk of a fatal outcome and acute cardiotoxicity, regulators mandate that any suspected overdose requires the patient to seek emergency medical attention immediately. This includes contacting emergency services or a national poison control center. Continuous ECG monitoring and intensive monitoring of vital signs are required upon hospital admission.

Management and Specific Considerations

Management is officially defined as symptomatic and supportive treatment. No specific antidote is known for Amandine overdosage. Procedures such as gastric lavage and administration of activated charcoal may be considered. A special consideration documented in official labeling is the increased severity of overdose in patients with renal impairment and the elderly population due to reduced drug clearance.

Therapeutic Uses of Amandine

What Amandine treats: main uses and benefits

Amandine is applied across domains where additional symptomatic support is needed. The medication is commonly used across conditions presenting with recurrent or episodic manifestations of movement difficulties.

Key therapeutic areas of use may include providing supportive symptomatic relief for certain movement symptoms related to Parkinson's disease and related Parkinsonism, assisting with managing involuntary movements (dyskinesia) that interfere with daily functioning, and addressing Extrapyramidal Symptoms (EPS) induced by other medications. Additionally, it may assist with persistent fatigue associated with chronic neurological conditions and is relevant for easing symptoms related to specific strains of the Influenza A virus.

The medication contributes to improved comfort during periods of heightened symptoms and is commonly used when short-term symptomatic assistance is needed.


Quick Fact: Support for Involuntary Movements The medication assists with maintaining functional stability and contributes to easing the overall symptom load during periods of heightened symptoms of dyskinesia.

Eligibility and Restrictions for Use

The eligibility for using Amandine is strictly defined by government regulatory documents, focusing on patient health status, age, and reproductive status.

Absolute Prohibition (Contraindications)

Amandine is contraindicated and must not be used in specific patient groups, including:

  • Patients with known hypersensitivity to the active ingredient, Amantadine.
  • Individuals with severe renal disease or End-Stage Renal Disease (ESRD), as the drug is cleared by the kidneys and can accumulate to harmful levels.
  • Women who are pregnant or trying to become pregnant, and those who are breastfeeding.
  • Patients with untreated angle-closure glaucoma or active convulsions/seizures, per some official labels.

Conditional Use and Age Restrictions

Use is generally established for adult patients for its neurological indications. However, other populations face restrictions:

  • Older Adults (ge 65 years): Caution is required, often necessitating closer monitoring due to potentially reduced renal clearance.
  • Children and Infants: Use is not established in infants under 1 year of age. The safety and effectiveness of Extended-Release (ER) formulations have not been established in those under 18 years of age.
  • Renal Impairment: Patients with non-severe renal impairment require conditional use, meaning the dosage must be adjusted to prevent accumulation.
  • Comorbid Conditions: The medication should ordinarily not be used in patients with a major psychotic disorder or be used with caution in patients with a history of gastric ulceration.

What should I know about interactions with other medicines?

Interactions with Other Medicines and Products

Amandine (Amantadine) may interact with various medicinal products and substances, potentially altering its effect or increasing the risk of certain side effects. It is important to inform a healthcare provider of all current and planned medications, including prescription and over-the-counter drugs, vitamins, and herbal supplements.

Key Drug Classes and Interactions

Interacting Product Category Potential Effect and Constraint
Anticholinergic Drugs Increased risk of atropine-like side effects (e.g., dry mouth, blurred vision, confusion). Dosage adjustment may be necessary.
Drugs Affecting Urinary pH Substances that change the urine to an alkaline pH (such as sodium bicarbonate) may decrease Amandine excretion, increasing its concentration in the body.
Central Nervous System (CNS) Stimulants Concomitant use may increase the potential for overstimulation, nervousness, or irritability.

Important Warnings and Restrictions

  • Alcohol: Concomitant use with alcohol is not recommended due to the potential for increased CNS effects such as dizziness, confusion, and dangerously low blood pressure. Some extended-release formulations may also carry a risk of rapid drug release (dose dumping) with alcohol.
  • Live Attenuated Influenza Vaccines (Nasal Spray): Use with these vaccines is generally not recommended during Amandine therapy and for a period after, as the medication may reduce the vaccine's effectiveness.

The overall interaction profile requires cautious use and close monitoring, especially when combining Amandine with other medications that affect the central nervous system or share similar excretion pathways in the kidney.

Mechanism of Action

Amantadine exerts multiple distinct pharmacodynamic actions, primarily within the central nervous system and against the influenza A virus. In the central nervous system, it functions as a non-competitive antagonist of the N-methyl-D-aspartate (NMDA) receptor, binding within the ion channel pore to modulate ion flux. This antagonism restricts the activation of the receptor by the excitatory neurotransmitter glutamate. Concurrently, the molecule modulates the dopaminergic system by increasing the presynaptic release of dopamine and inhibiting its neuronal reuptake. Amantadine also acts as an agonist for the sigma-1 (sigma1) receptor, which is involved in modulating neurotransmitter systems including the dopaminergic pathway. Furthermore, the drug functions as a negative allosteric modulator of specific subtypes of nicotinic acetylcholine receptors (nAChRs), such as alpha4beta2 and alpha7. Separately, for its antiviral action, amantadine interacts with the M2 ion channel protein of the influenza A virus, functioning as a channel blocker. This interaction impedes the M2 protein's proton-conducting function, thereby preventing the acidification necessary for viral uncoating and subsequent release of viral nucleic acid into the host cell cytoplasm.

Dosage and Administration Information

Amandine is administered solely through the oral route, available in forms such as immediate-release (IR) capsules and tablets, syrup, and specialized extended-release (ER) products. Treatment for neurological indications is initiated with a 100 mg dose taken once daily. The standard maintenance regimen for IR forms is typically 100 mg taken twice daily, totaling 200 mg per day, though dosages may be increased under guidance up to a maximum of 400 mg per day in divided doses. Extended-release formulations are strictly dosed once daily, with specific products designated for administration either in the morning or at bedtime.

IR forms are advised to be taken with food or after meals to support tolerance. Handling requires adherence to the specific formulation: ER tablets must be swallowed whole and cannot be crushed, chewed, or divided. Dose increases, or titrations, should be conducted gradually, separated by intervals of no less than one week.

Standard clinical protocols involve dose reduction for certain populations. Older adults (65 and over) often begin and maintain treatment at the lower 100 mg daily dose. Furthermore, dosing is individually adjusted based on the patient's creatinine clearance (CrCL) to prevent accumulation in those with reduced kidney function. If long-term use is concluded, the medicine is tapered gradually over a period of one to two weeks, and sudden cessation is advised against. If a dose is missed, the patient should skip the missed dose and take the next scheduled dose as planned.

Recent Clinical Evidence

Research evidence / Overview of studies for Amandine

Evidence for Use in Levodopa-Induced Dyskinesia (LID)

Research exploring Amandine in Levodopa-Induced Dyskinesia (LID) primarily involved randomized, controlled, double-blind trials. These high-level studies monitored adults with established Parkinson's disease experiencing dyskinesia from levodopa therapy. Outcomes related to physical discomfort were examined using specialized clinical rating scales that measured changes in the intensity and duration of involuntary movements.

Findings from these trials describe patterns observed in the studies related to the measured change in dyskinesia scores in the short term. Studies documented changes measured during the study period, including time spent in different motor states (known as "ON" and "OFF" time). This evidence contributes to describing short-term symptom patterns in this patient population.

However, the long-term outcomes remain uncharacterized. Research highlights that anti-dyskinetic activity was observed in some studies to may change or attenuate when the medicine was observed in continuous, prolonged use (for instance, beyond eight months). The long-term outcomes remain uncharacterized.


Evidence for Use in General Parkinsonism Symptoms

Amandine was studied for its relevance in trials assessing short-term or episodic symptom patterns related to general motor control. Research included historical clinical trials and observational studies examining patients with Parkinson's disease. Studies monitored physical discomfort and daily functioning, using motor function rating scales to evaluate changes in core symptoms like rigidity, tremor, and slowness of movement (bradykinesia).

Reports described observed changes in some patients' scores in the short-term, particularly regarding rigidity and tremor. This evidence is derived from settings with varying symptom burdens, but the evidence quality varies across studies, with some data coming from older trials where a placebo control was not utilized. Comparative evidence with other treatments is not a focus of the currently available data.

Evidence for Use in Symptom Management for Influenza A

The agent was evaluated in historical controlled clinical trials to monitor outcomes related to systemic changes associated with influenza A, measuring the duration and severity of flu-like symptoms. Historical trials reported measurements showing a change in the duration of illness in study participants compared to controls.

However, surveillance data has documented the widespread emergence and transmission of drug-resistant strains of the Influenza A virus across numerous global regions. Due to the evolution of the virus, historical findings may not fully reflect current clinical relevance, limiting the certainty of applying these findings today.

Evidence for Use in Chronic Neurological Fatigue

Research exploring fatigue primarily involved small, randomized, controlled, cross-over trials in adults with chronic neurological conditions, such as Multiple Sclerosis. Patient-reported outcomes describing perceived discomfort were measured using standardized scales. Reported outcomes were short-term, and findings were mixed, with studies noting changes measured during the short treatment periods. The evidence is limited due to factors such as small sample sizes, and a consistent, clear symptomatic pattern across all studies appears to not be established.

Key Studies & References

  1. Investigation of the Long-Term Effects of Amantadine Use in Parkinson's Disease

Frequently Asked Questions (FAQ)

Common questions about Amandine (FAQ)


Q: Is Amandine considered a controlled substance?

No. Regulatory documents published by government agencies explicitly indicate that Amandine (Amantadine) is not categorized as a federally scheduled controlled substance. Its primary classification relates to its neurological and antiviral pharmacological actions.


Q: Where can I find the official prescribing information or patient leaflet for Amandine?

The official Prescribing Information, Patient Information Leaflets, and drug labels are available from government sources. These documents can be found on public online databases like the FDA's Drugs@FDA or the NIH's DailyMed, which serve as central repositories for regulatory drug data.


Q: Is Amandine typically used for a short period or for long-term treatment?

Amandine is used for both short-term and long-term purposes, depending on the condition being addressed. The medicine is indicated for short-term use in the treatment and prevention of Influenza A. For neurological conditions like Parkinson's disease, official information indicates a role for long-term management.


Q: How long does it typically take for Amandine to start working?

Studies examining the management of Parkinson's symptoms describe effects as occurring within two days. However, official information also notes that some patients may need to continue treatment for up to two weeks before experiencing the full measured effect. Individual response patterns may vary.


Q: How long does Amandine stay in a person's system after the last dose?

Pharmacokinetic data from official documents describes how long the drug remains in the body using a measure called the half-life. The average half-life for Amandine in healthy adults is stated to be approximately 17 hours, meaning that is the time it takes for the concentration of the drug in the body to be reduced by half.


Q: Are there known contraindications for Amandine in people with kidney or liver problems?

Amandine is removed from the body primarily by the kidneys. Because of this, official documents state that the drug must not be used in patients with End-Stage Renal Disease. For individuals with less severe kidney impairment, dosage adjustments are formally required by a healthcare professional.


Q: Does Amandine require special monitoring or blood tests by a healthcare provider?

Special monitoring is often indicated. Dose adjustments are based on kidney function, and this monitoring may involve blood tests for Creatinine Clearance (CrCL). The labeling also indicates that close observation may be necessary for patients with a history of seizures or psychiatric disorders.


Q: Why is Amandine only available with a prescription?

The prescription-only status is linked to the drug’s required level of professional supervision. Regulatory documents cite the requirement for dose adjustments based on individual organ function and the risk of serious side effects, all of which necessitate ongoing healthcare oversight.


Q: Does Amandine need to be taken at the same time every day to be effective?

Official prescribing instructions define the precise timing for taking Amandine, especially for extended-release forms (e.g., 'once daily at bedtime'). Consistent dosing times help maintain stable levels of the drug in the body, which is intended to support the prescribed treatment.


Q: Are there rules or precautions about driving or operating machinery while taking Amandine?

Official labeling includes a caution against driving and operating machinery. This precaution is necessary due to the potential for central nervous system effects, such as dizziness or blurred vision, which could impair mental alertness and motor coordination.


Q: Are there specific foods or beverages that are known to interact with Amandine?

Official regulatory labeling strongly advises against the use of alcohol while taking Amandine due to the potential for increased central nervous system effects. Otherwise, the immediate-release form of the medication can generally be taken with or without food to support tolerance.


Q: Can Amandine be taken with caffeine?

The official product information includes a warning about combining Amandine with other stimulant medications. Because caffeine is a common stimulant, this combination could potentially increase the risk of certain side effects. Official documents advise caution when combining Amandine with any central nervous system stimulant.


Q: What is the risk of Amandine interacting with common over-the-counter pain relievers?

Amandine is known to interact with medications that have anticholinergic effects, which are sometimes present in non-prescription products like allergy or nighttime cold medicines. Combining these can increase the risk of certain side effects. Information regarding all other medicines should be discussed with a healthcare provider.


Q: Is it normal to feel tired or fatigued when starting Amandine?

Yes, feelings of tiredness (fatigue) and drowsiness (somnolence) are documented as common adverse reactions in the official safety profile. These effects were reported by patients during clinical trials.


Q: Are there common side effects associated with Amandine that usually improve over time?

Official warnings and precautions indicate that certain central nervous system effects, such as feeling dizzy or lightheaded, are more likely to happen when treatment is first started or when the dose is being increased. This indicates that these effects are more common during the initial phases of therapy.

How should Amandine be stored and disposed of?

How to Store and Dispose of Amantadine Hydrochloride

Amantadine Hydrochloride must be stored in the original container, which should be kept tightly closed at all times.

Required Storage Conditions

Condition Requirement
Temperature Store at Controlled Room Temperature, 20 C to 25 C (68 F to 77 F).
Protection Store away from excess heat and moisture; do not freeze.
Safety Keep the medicine out of the reach and sight of children.

Disposal Instructions

Disposal should follow the official drug take-back program procedure. The medicine is not on the list for flushing, and must not be poured down the sink or toilet. If a take-back program is unavailable, the expired product must be removed from its container, mixed with an undesirable substance (e.g., dirt), sealed in a bag, and discarded in the household trash.

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

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