Levomil

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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 Levomil

Levomil is a common commercial name for an oral medication defined by its active pharmaceutical ingredient, Levocetirizine dihydrochloride. It is categorized as a highly selective, non-sedating second-generation antihistamine. Its primary function is to provide targeted relief from the physical manifestations of allergic reactions by blocking the activity of histamine, a key inflammatory mediator.

Quick Facts Description
Active ingredient Levocetirizine dihydrochloride
Form Oral tablet and oral solution
Pharmacological class H1 Receptor Antagonist (Antihistamine)
Common use General allergy symptom relief
Origin Synthetic (R-enantiomer of Cetirizine)

1. Defining Levomil: Class and Core Identity

Levomil's composition is based on the potent R-enantiomer of Cetirizine, making it a purer, synthetic derivative with high specificity for the histamine H1 receptor. This selective binding capability confirms its status as an H1 receptor antagonist. This pharmacological selectivity is clinically recognized for reducing the potential for significant central nervous system effects often associated with older antihistamine classes. Levocetirizine is considered one of the most potent and highly selective H1 receptor antagonists available. The medicine is highly effective in blocking the effects of histamine.

2. What is the Purpose of Levocetirizine?

The general therapeutic purpose of Levocetirizine is to provide prompt anti-allergic relief by directly counteracting the biological effects of histamine released during the body’s immune response. This action minimizes discomfort, such as the persistent itching or sneezing that may occur from typical exposure to pollen or dust.

The substance acts as an inverse agonist, stabilizing the inactive state of the H1 receptors, thereby preventing endogenous histamine from triggering symptoms. Levocetirizine is used for the symptomatic relief of allergic conditions. The medication helps in mitigating the itching, nasal discharge, and irritation associated with various allergic responses.

3. Composition and Available Forms

Levomil is formulated as a single-agent product, containing only the active substance Levocetirizine dihydrochloride and necessary pharmaceutical excipients. It is designed solely for oral administration. A key differentiating feature is its dual availability as both a film-coated scored tablet and an oral solution with an aqueous base. The oral solution is a primary distinction, often specifically positioned to facilitate accurate dosing and ease of swallowing for pediatric patients who require anti-allergic therapy.

Regulatory References

  1. Allergic Rhinitis and Urticaria
  2. NIH MedlinePlus Information
  3. Oral Administration

What side effects are possible with Levomil?

Levomil, a serotonin-norepinephrine reuptake inhibitor (SNRI), is associated with a range of documented side effects and safety concerns derived from regulatory labeling.

Warning: Suicidal Thoughts and Behaviors

Like other antidepressants, Levomil carries a Boxed Warning regarding an increased risk of suicidal thoughts and behaviors in young adults (up to age 24), adolescents, and children. Close monitoring for clinical worsening and the emergence of suicidal tendencies is required, especially when treatment is initiated or the dosage is adjusted.

Common and Serious Adverse Reactions

Classification Adverse Reactions (by System-Organ Class)
Most Common (Incidence ge 5%) Nausea, constipation (Gastrointestinal); Hyperhidrosis (Dermatologic); Heart rate increase, tachycardia, palpitations (Cardiovascular); Erectile dysfunction, ejaculation disorder (Urogenital).
Serious & Clinically Significant Serotonin Syndrome, Elevated Blood Pressure/Heart Rate, Abnormal Bleeding, Angle-Closure Glaucoma, Urinary Hesitation/Retention, Activation of Mania/Hypomania, Seizures, and Hyponatremia.

Contraindications and Restrictions

  • MAOIs: Levomil is contraindicated for use with a Monoamine Oxidase Inhibitor (MAOI) or within 14 days of discontinuing an MAOI, due to the risk of Serotonin Syndrome. A period of at least 7 days must elapse after stopping Levomil before starting an MAOI.
  • Glaucoma: The medication is contraindicated in patients with uncontrolled narrow-angle glaucoma.
  • Renal Impairment: Dose reduction is necessary for patients with moderate to severe renal impairment.
  • Dose Interaction: The maximum dosage must be limited when co-administered with strong CYP3A4 inhibitors. Use with alcohol should be avoided due to the potential for accelerated drug release (dose dumping).

Overdose and Emergency Response

Overdose and when to seek help

The information below describes the manifestations and required emergency actions for Levomil (levomilnacipran) overdosage, as officially documented in government regulatory prescribing information.

Overdose exposure may result in serious manifestations involving the Central Nervous System (CNS) and cardiovascular system. Documented signs include extreme sleepiness, confusion, agitation, palpitations, and tachycardia (elevated heart rate). Severe or potentially life-threatening outcomes can include Seizures, Coma, and the development of Serotonin Syndrome.

Required Emergency Actions

The regulatory guidance mandates specific actions in cases of suspected overdose. Immediate medical attention is required, and individuals should consult a Certified Poison Control Center for advice. If an individual has collapsed or is not breathing, local emergency services must be contacted without delay.

Management and Monitoring

Official documents indicate that the management of an overdose should consist of supportive care and close medical supervision. Physicians are directed to monitor cardiac rhythm and vital signs continuously. It is officially stated that no specific antidotes are known for Levomilnacipran, and due to the drug's high volume of distribution, methods like dialysis will not be effective in reducing plasma concentrations. Supportive measures may include ensuring an adequate airway, oxygenation, and ventilation.

Therapeutic Uses of Levomil

Quick Facts: Levomil Uses

  • Support for Major Depressive Disorder (MDD): May assist in addressing the emotional and physical symptoms associated with MDD in adults.
  • Helps Moderate Symptoms: Is prescribed to contribute to an improvement in mood and a reduction in core depressive symptoms.
  • Assists with Functioning: May offer support in improving aspects of daily functioning that can be affected by depression.

Levomil (levomilnacipran) is a prescription medication authorized for the management of Major Depressive Disorder (MDD) in adults. It is part of a class of medicines known as serotonin and norepinephrine reuptake inhibitors (SNRIs).

The medication is designed to help address the spectrum of emotional and physical manifestations associated with MDD, which can include prolonged low mood, diminished interest in activities, and changes in energy levels. Treatment aims to support the restoration of emotional balance and help alleviate the overall burden of depressive symptoms.

Clinical studies have evaluated Levomil's capacity to contribute to better mental well-being and improved daily functioning for adults diagnosed with MDD. As with any treatment, a healthcare provider determines if Levomil is an appropriate component of a comprehensive treatment plan for depression. Levomil is not authorized for the management of fibromyalgia.

Eligibility and Restrictions for Use

Levomil (a hypothetical medication) is generally prescribed for individuals diagnosed with specific conditions related to its intended mechanism of action. Appropriate use is determined by a healthcare provider after a complete assessment of the patient's medical history, current health status, and other medications being taken.


Who Can Use Levomil?

Generally, Levomil is indicated for adults who meet the diagnostic criteria for the target condition and who have no known contraindications. Specific criteria may include age restrictions, symptom severity, or prior lack of success with alternative treatments. Individuals must be able to adhere to the prescribed dosing schedule.


Who Cannot Use Levomil?

Contraindications are medical reasons that make the use of a drug potentially unsafe. Individuals who should not use Levomil typically include those with a known hypersensitivity or allergic reaction to the active ingredient or any excipients in the formulation.

Additionally, use is often contraindicated in patients with certain severe hepatic or renal impairment, specific uncontrolled cardiovascular conditions, or during pregnancy and breastfeeding, unless the potential benefit clearly outweighs the risk. Pediatric use is often restricted or not recommended depending on the drug's safety profile in children.

What should I know about interactions with other medicines?

Levomil's interaction profile is defined by combinations that increase the risk of Serotonin Syndrome and those that may lead to abnormal bleeding.

Clinically Significant Drug Interactions

Interaction Category Practical Constraint Regulatory Context
Monoamine Oxidase Inhibitors (MAOIs) Concomitant use with MAOIs (e.g., isocarboxazid, selegiline) is contraindicated. A 14-day washout period is required after stopping an MAOI before starting Levomil, and a 7-day washout is required after stopping Levomil before starting an MAOI. Serotonin Syndrome Risk
Other Serotonergic Agents Co-administration with agents like triptans, tramadol, or St. John’s Wort requires close patient monitoring due to the risk of Serotonin Syndrome. Pharmacodynamic Effect
Drugs Affecting Hemostasis Concurrent use with anticoagulants (e.g., warfarin) or antiplatelet drugs (e.g., NSAIDs, aspirin) may increase the risk of bleeding events. Platelet Function Impairment
Strong CYP3A4 Inhibitors Co-administration with strong inhibitors of the CYP3A4 enzyme (e.g., ketoconazole) requires a maximum Levomil dose of 80 mg once daily due to increased drug exposure. Pharmacokinetic Constraint
Alcohol (Ethanol) Avoid concurrent use. Alcohol disrupts the extended-release formulation, which may result in a rapid drug release. Formulation Integrity

These restrictions and requirements are explicitly documented in official regulatory labeling (such as FDA and Health Canada), primarily focusing on managing the elevated risks of bleeding and the potentially life-threatening Serotonin Syndrome.

Mechanism of Action

How Levomil Works

Levomil exerts its effects by selectively engaging mechanisms that modulate specific signaling elements within biological systems. Its pharmacodynamic action is focused on altering core signaling pathways, which facilitates predictable adjustments to the system's physiological equilibrium.


Modulation of Receptor-Mediated Signaling

Levomil acts within domains involving receptor-mediated signaling to influence systems where specific transmitters or mediators dominate. This involves initiating or suppressing signaling sequences that modify early molecular steps, consequently altering the resulting concentration or activity of downstream mediators and leading to shifts in physiological response levels.


Adjustment of Pathway Activity

The compound is relevant in systems where targeted pathway modification is required, particularly where pathway activity exhibits elevated signaling. Levomil influences processes driven by distinct signaling patterns by modifying key pathways associated with heightened physiological responses, ultimately leading to altered pathway equilibrium within the targeted biological circuits.

Dosage and Administration Information

The use of Levomil (levomilnacipran) is defined by an oral, once-daily regimen utilizing the extended-release (ER) capsule formulation. A standardized initiation protocol establishes the maintenance dose. Treatment begins with a 20 mg capsule taken once daily for a period of two days (the titration phase). Following this, the dose is generally increased to 40 mg once daily. The maintenance dosage range extends up to a maximum daily dose of 120 mg based on clinical response. Dose increases beyond 40 mg should occur in 40 mg increments with at least two days between adjustments.

A critical administration rule specifies that the capsule must be swallowed whole and must not be opened, crushed, or chewed, as doing so compromises the extended-release mechanism. The medication is taken once daily and may be administered with or without food, though consistency in timing is recommended.

Dosage adjustments apply to patients with specific conditions. For example, the maximum daily dose is restricted to 80 mg for individuals with moderate renal impairment or when the drug is co-administered with a strong CYP3A4 inhibitor. This limit is further reduced to 40 mg for patients with severe renal impairment. In the event of discontinuation, the process involves a gradual dose reduction (tapering) rather than an abrupt stop to follow best procedural practices.

Recent Clinical Evidence

Levomil (levomilnacipran) was evaluated in a clinical development program that included randomized, controlled trials and subsequent longer-term follow-up research. The evidence contributes to understanding symptom patterns and is primarily derived from studies assessing short-term changes in adults with Major Depressive Disorder (MDD).


Evidence for Use in Major Depressive Disorder (MDD) in Adults

The core evidence for the regulatory review of Levomil consists of multiple, well-designed randomized, double-blind, placebo-controlled trials (RCTs). These controlled studies were conducted primarily in adults diagnosed with MDD and typically assessed symptom patterns over a short-term follow-up duration of 8 to 11 weeks. The research contributes to the broader evidence landscape by describing the patterns observed in the proportion of participants whose symptom scores met predefined response criteria.

Measuring Symptoms and Functioning

To document changes in daily life, researchers applied in studies examining patient-reported experiences outcomes reflecting daily functioning or activity level. Specifically, they utilized tools like the Sheehan Disability Scale to track how patients rated their ability to manage responsibilities at work, in social settings, and at home.


Long-Term and Maintenance Research

Studies exploring symptom stability were conducted, with observation periods extending up to 48 weeks. These research scenarios included open-label extension studies and randomized-withdrawal studies. The evidence derived from these settings describes patterns related to the long-term observation of scores achieved in the first few months.


Evidence Gaps and Areas of Uncertainty

Several limitations have been noted. The follow-up durations were limited in the primary, highest-certainty RCTs. This means there is limited information for long-term outcomes, and long-term effects are not fully established. Comparative evidence is lacking. Research examining the pediatric population was conducted, but the data are still emerging and findings were reported to be inconclusive for detecting an effect compared to placebo.

Key Studies & References Fetzima Extended-Release (Levomilnacipran) Receives FDA Approval for the Treatment of Major Depressive Disorder in Adults - American Health & Drug Benefits

Frequently Asked Questions (FAQ)

Common questions about Levomil (FAQ)

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

The labeling suggests that symptom relief may begin within 30 to 60 minutes after the first dose. However, individual responses can vary.

Clinical information indicates that the full therapeutic effect may be experienced within one week of consistent use. If symptoms do not improve, it is recommended to consult with a healthcare professional for guidance.

Q: Is it safe to drink coffee or alcohol while taking Levomil?

Official labeling advises against the use of alcohol, as it may increase the sedative effects of the medication and significantly impair the ability to drive or safely operate machinery.

Caffeine use, such as coffee, is not specifically contraindicated, but excessive intake is often advised against as it can potentially increase anxiety. It is best to discuss appropriate limits with a healthcare professional as they can provide personalized advice based on the official prescribing information.

Q: What happens if I forget to take a dose of Levomil?

Specific guidance for a missed dose is included in the official prescribing information.

Generally, if a dose is missed, patients are often advised to take it as soon as it is remembered. However, if it is near the time of the next scheduled dose, the patient is usually advised to skip the missed dose and simply resume the regular schedule. Patients are specifically instructed not to take two doses at the same time, as this may increase the risk of side effects.

How should Levomil be stored and disposed of?

Levomil (levomilnacipran) extended-release capsules must be stored according to official regulatory guidelines to maintain stability.


Required Storage Conditions

Levomil requires storage at Controlled Room Temperature (CRT), which is defined as 20 C to 25 C (68 F to 77 F). Brief excursions outside this range are permitted, but temperatures must not exceed 30 C (86 F). The medication must be kept in its original container and stored strictly out of the reach of children.


Disposal Instructions

Unused or expired Levomil must be disposed of properly. The preferred method is using a drug take-back program where available. If no take-back option is accessible, the medicine should be mixed with an undesirable substance (such as dirt or used coffee grounds), placed in a sealed container, and then discarded in the household trash. The medication must not be flushed down a toilet or poured down a sink.

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

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