Deprexolet

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Deprexolet

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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 Deprexolet

Property Description
Active ingredient Mianserin hydrochloride
Form Oral tablets
Pharmacological class Tetracyclic Antidepressant (TeCA)
General purpose Mood stabilization and anxiety relief
Origin Synthetic small molecule

What Type of Medicine is Deprexolet (Mianserin)?

Deprexolet is a prescription-only medicine containing the active ingredient Mianserin, which is classified as a Tetracyclic Antidepressant (TeCA). This chemical designation positions it within the group of psychoactive drugs used for managing mood disorders. Mianserin's profile often leads to it being described as an atypical antidepressant due to its unique mechanism, differentiating it from older Tricyclic Antidepressants (TCAs) and the more common Selective Serotonin Reuptake Inhibitors (SSRIs). Its pharmacological profile is characterized by antagonism at specific alpha-2 adrenergic and 5-HT receptors. This drug belongs to a category designed to modulate neurochemical balance, a property associated with its use in treating depressive episodes.

Form and Composition: What is Mianserin Hydrochloride?

Deprexolet is supplied as an oral tablet, which is a single-ingredient product derived from the synthetic compound Mianserin. The active ingredient is typically formulated as Mianserin hydrochloride, which is the chemically stable salt form of the small molecule and facilitates precise dosing in a solid preparation. The selection of Mianserin as a TeCA is significant because it relates to its unique receptor binding profile; it possesses a high affinity for the Histamine H1 receptor, which contributes to its sedative properties. This pharmacological differentiation is relevant where co-existing sleep disturbance is a primary concern.

The General Purpose of this Atypical Antidepressant

The general purpose of Deprexolet is to promote mood stability and manage associated symptoms of depression and anxiety through its distinct central nervous system activity. The core mechanism involves augmenting the availability of mood-regulating neurotransmitters, particularly norepinephrine, combined with a strong antihistaminic action. This results in a pronounced hypnosedative quality. For example, a typical use scenario involves helping stabilize a patient's emotional state when depression is compounded by symptoms of chronic restlessness and insomnia. This combination allows the medicine to simultaneously address underlying mood imbalances and alleviate concurrent symptoms like persistent anxiety, restlessness, and disturbed sleep patterns often accompanying depressive states.

What side effects are possible with Deprexolet?

Possible Side Effects and Safety Information

This section describes the adverse effects and safety constraints of Deprexolet (mianserin) as officially documented in governmental regulatory labeling. It does not provide medical advice or instructions for use.


Documented Adverse Reactions and Frequencies

Adverse reactions are classified according to frequency, based on clinical data detailed in regulatory documents.

Frequency Category Documented Adverse Reactions
Very Common (>10%) Drowsiness/Sedation (particularly at treatment start)
Common (1% to 10%) Drowsiness (maintenance), Tremor, Headache, Dizziness, Constipation, Dry mouth
Uncommon (0.1% to 1%) Weight gain
Not Known Agranulocytosis, Convulsions, Hypomania, Jaundice, Suicidal thoughts/behaviour

Serious Safety Considerations

The most clinically significant adverse reactions officially listed include Bone Marrow Depression (such as Agranulocytosis), Suicidal Thoughts and Behaviour, and the risk of Convulsions or Jaundice. The development of Bone Marrow Depression is most commonly reported after four to six weeks of treatment, and regulatory guidance mandates blood monitoring (full blood count) every four weeks during the initial three months of therapy.

Population and Use Restrictions

  • Children and Adolescents (Under 18): Use is contraindicated. Official documentation notes an observed increased risk of suicide-related behaviour in clinical trials for this age group.
  • Hepatic Impairment: The medicine is contraindicated in cases of severe liver disease.
  • Time-Related Pattern: The risk of drowsiness is highest during the first few days of treatment.
  • Monitoring Note: Treatment must be withdrawn immediately if signs of infection (e.g., sore throat, fever) appear, and a blood count must be performed.

Overdose and Emergency Response

Overdose and when to seek help

Official regulatory labeling describes the clinical manifestations and mandated emergency actions for an overdose of Deprexolet (Mianserin). These descriptions are based on documented outcomes and dictate the immediate help-seeking requirements for this medicine.

Overdose may initially present with central nervous system effects such as severe drowsiness, dizziness, ataxia (unsteadiness), and uncontrollable eye movements known as nystagmus. Regulatory documents specify that these manifestations can rapidly progress to severe and life-threatening outcomes, including convulsions, coma, and dangerous cardiovascular effects such as ventricular fibrillation, cardiac arrest, and significant ECG abnormalities.

Official Overdose Focus Regulatory Statement
Urgent Medical Help Contact your doctor or nearest hospital emergency department immediately.
Required Action Take the container and any remaining tablets to the hospital.
Management Principle Treatment is symptomatic and supportive, as no specific antidote is known.
Monitoring Hospital monitoring is required, including observation of heart function via ECG monitoring.
Potentiated Risk Toxicity is significantly potentiated by the simultaneous ingestion of alcohol or other psychotropic agents.

The regulatory profile emphasizes that immediate medical attention is necessary, given the potential for severe systemic toxicity. The official management approach is directed toward supporting the patient's vital functions and controlling specific symptoms, such as severe hypotension or seizures, until the toxic effects subside.

Therapeutic Uses of Deprexolet

What Deprexolet Treats: Main Uses and Benefits

The therapeutic role of Deprexolet (Mianserin) plays a role in managing symptoms related to emotional balance and sleep disturbance in patients experiencing mood disorders. This medication is prescribed to help relieve the symptoms of depression. It is applied across domains where additional symptomatic support is needed, managing conditions marked by clusters of symptoms that interfere with functional stability.

The medication is commonly used to help with conditions presenting with Major Depressive Episodes, and it is considered relevant for easing symptom clusters that include persistent low mood, sadness, sleep disturbance, and anxiety. It is applied during phases when symptoms become more noticeable, commonly used when supportive symptom management is appropriate for both the core emotional distress and co-occurring physical tension.

“It supports the patient during difficult episodes by easing distress and assists with maintaining functional stability in their routine activities.”

This supportive relief generally contributes to improved comfort, helping patients cope more steadily with symptom fluctuations.

Quick Fact: Relief for Sleep Disturbance

Deprexolet is considered relevant in clinical scenarios where persistent insomnia and chronic restlessness are prominent features alongside depression, contributing to the management of disruptive sleep patterns.

Eligibility and Restrictions for Use

Official Regulatory Eligibility for Deprexolet (Mianserin)

Official prescribing information for Deprexolet, which contains Mianserin, establishes clear patient eligibility boundaries, classifying populations as either permitted, restricted, or strictly prohibited from use.

Scope Element Official Regulatory Status
Populations for whom use is contraindicated Patients with severe liver disease, established hypersensitivity to mianserin, or active mania [Source 1.2, 1.7].
Age-related eligibility rules Children and adolescents under 18 years are not recommended for treatment; safety and efficacy are not established. Use in older adults requires caution and close monitoring [Source 1.2, 1.5].
Pregnancy and lactation eligibility Use is contraindicated during breastfeeding as the substance passes into milk. Use during pregnancy is not recommended unless judged absolutely necessary due to insufficient human safety data [Source 1.2, 1.3, 1.7].
Condition-specific restrictions Special caution is required for patients with a history of epileptic seizures, severe renal dysfunction, or recent cardiac disorders like heart block [Source 1.2, 1.6, 1.7].

These guidelines formally define who is eligible, who must be excluded, and which populations require close supervision to ensure compliance with label-based regulatory standards.

What should I know about interactions with other medicines?

Deprexolet Interactions with other medicines and products

The official regulatory profile for Deprexolet (Mianserin) interactions is defined by mandatory co-administration prohibitions, pharmacodynamic potentiation, and pharmacokinetic (PK) exposure modifications, all strictly documented in government prescribing information.

Formal Interaction Classifications and Restrictions

Classification Constraint
Contraindicated Combinations Co-administration with Monoamine Oxidase Inhibitors (MAOIs) is formally prohibited and requires a minimum two-week separation (wash-out period) when starting or stopping therapy.
Prohibited Use Concomitant use with specific alpha-2 agonists and antiobesity agents such as Brimonidine and Sibutramine must be avoided.

Clinically Significant Pharmacodynamic and Pharmacokinetic Effects

Deprexolet may potentiate the central nervous depressant action of other substances, including alcohol, anxiolytics, hypnotics, and antipsychotics. The medicine can also increase the effect of Coumarin-type Anticoagulants (e.g., Warfarin), necessitating close additional monitoring procedures of the anticoagulant effect.

PK Exposure Modification is documented with enzyme-inducing anticonvulsants, such as Carbamazepine and Phenobarbital, which accelerate mianserin's metabolism, resulting in a reduced plasma concentration of the medicine. Due to the potential for lowering the convulsive threshold, caution is required when Deprexolet is administered with other Antiepileptics.

Mechanism of Action

How Deprexolet Works: The Pharmacological Mechanism


Noradrenergic Signaling Augmentation via Disinhibition

Deprexolet acts as a high-affinity antagonist of presynaptic Alpha-2 Adrenergic Receptors (alpha2-AR), which serve as inhibitory autoreceptors on noradrenergic neurons. By blocking this receptor, the molecule removes the negative feedback mechanism. This disinhibition immediately increases the release and availability of norepinephrine in the synaptic cleft, establishing the foundational molecular cascade that contributes to a shift in noradrenergic balance and sustained signaling.


Central H1 Receptor Blockade and Sedative Effect

The drug exhibits high affinity for Histamine H1 Receptors ( H1R) in the central nervous system, resulting in a profound blockade of histaminergic signaling. This action directly suppresses the brain's arousal centers, generating an immediate physiological consequence characterized by a hypnosedative state.


️ Targeted Modulation of 5-HT 2 Serotonin Receptors

Mianserin selectively antagonizes the 5-HT 2A and 5-HT 2C receptors, which are postsynaptic receptors involved in the overall regulation of monoamine release. This targeted modulation influences the activity across key neuronal circuits, acting alongside the noradrenergic disinhibition to fine-tune the neuronal environment.

Dosage and Administration Information

How to Use Deprexolet: General Administration Guidelines

Administration Scope

Feature Standard Instruction
Route of administration: Oral use only.
Dosing schedule (Adults): Treatment typically commences with 30 mg or 40 mg daily. The effective maintenance dose generally ranges from 30 mg to 90 mg per day.
Preparation requirements: The film-coated tablets must be swallowed whole with fluid and should not be chewed.
Age-group administration rules: Older Adults (Geriatric): Initial dose should not exceed 30 mg daily and must be increased slowly. A single night-time dose is preferred for this group. Pediatric Population: Use is not recommended in patients under 18 years of age.
Missed-dose rules: If a dose is missed, it should be taken as soon as remembered unless it is near the next scheduled dose. Patients must not take a double dose to compensate.
Special procedural conditions: The daily dose may be administered as a single dose at night or split into divided doses. Maintenance treatment is generally continued for several months after clinical improvement.

Instruction Classifications (High-Level)

Classification Detail
Administration method type: Oral administration (solid form).
Frequency pattern: Once daily or divided use.
Clinical administration type: Standardized clinical parameters for use.
Use-context constraints: Mandatory lower starting dose for older adults; procedural prohibition on crushing or chewing tablets.

Connection to the overall use protocol

These labeled instructions define the standardized approach to using the medicine. The protocol mandates initiation within a specific starting dose and provides two frequency options (single nightly or divided doses). Furthermore, these guidelines establish age-specific restrictions and clear instructions to avoid double dosing after a lapse.

Recent Clinical Evidence

Research evidence / Overview of studies for Deprexolet

Research Evidence for Major Depressive Episodes

Deprexolet was studied for major depressive episodes primarily through short-term Randomized Controlled Trials (RCTs). These trials are commonly used to establish evidence; these trials involve comparing the agent against a placebo (a dummy pill) or another active medication. The research examined adults with moderate to severe symptoms in studies that generally lasted 3 to 12 weeks. The main outcomes measured included changes in specific depressive symptom severity scores and the frequency of achieving remission, which is defined by study criteria as near-total symptom resolution.

Findings described symptom score changes observed in the studies compared to placebo during the acute phase of depression. However, the majority of the existing research focused on these short-term symptom changes. As a result, there is limited information for long-term outcomes regarding sustained recovery and the prevention of future depressive episodes.


Evidence When Used for Non-Response to Other Antidepressants

Research examined Deprexolet's use as an augmentation strategy—meaning it was studied for being added to another existing antidepressant in patients whose initial monotherapy had resulted in a partial or incomplete response. This research was explored in intermediate-term RCTs and focused on adults classified by study criteria as non-responders or having a partial response. These studies monitored changes in remission rates and overall symptom scores over defined time intervals lasting 5 to 12 weeks.

Evidence is limited regarding this use, as the sample sizes were modest in some of the dedicated RCTs. Comparative evidence against other studied combinations is lacking.


Research Focus on Co-Occurring Symptoms: Sleep Disturbance and Anxiety

Deprexolet was studied for its association with sleep disturbance and anxiety symptoms when they occur alongside depression. Research explored short-term symptom changes, focusing on outcomes such as measures of sleep quality, insomnia symptoms, and scales for anxiety severity. The research describes changes measured during the study period related to sleep metrics, with some reports indicating observations documented after the first dose. The available evidence is focused on anxiety when it co-occurs with a major depressive episode, not on primary anxiety disorders.

Frequently Asked Questions (FAQ)

Common questions about Deprexolet (FAQ)


Q: What is Deprexolet actually used for?

A: According to official regulatory documents, this medicine is formally indicated for the treatment of symptoms associated with depressive illness. This therapeutic indication means the medicine is authorized to manage symptoms commonly related to major depressive disorder, as defined by health authorities.

Q: Are there different versions or brands of Deprexolet?

A: Yes, the active ingredient in Deprexolet, called mianserin, is available under various international brand names. These can include names like Tolvon, Lerivon, and Lantanon, with the specific name used depending on the country and distributor.

Q: Is Deprexolet considered a controlled substance?

A: The medicine is generally classified as a prescription-only medicine by most regulatory bodies. However, the active ingredient is listed as a controlled substance (Class C1) in the classification system of at least one official national health authority.

Q: How is the safety of Deprexolet classified by health agencies?

A: Regulatory agencies use specific systems to classify the safety constraints of medicines. For instance, the active ingredient has been assigned the Australian Pregnancy Category B2 by the TGA. The classification is based on the data available to the regulatory authority at the time of review.

Q: What is a 'contraindication' for Deprexolet, in plain language?

A: A contraindication is a term used in official documentation to describe a specific condition or circumstance where the regulatory agencies have determined that the medicine must not be used. Examples of contraindications for this medicine include having severe liver disease or an active manic episode.

Q: Why does the packaging list so many potential side effects for Deprexolet?

A: Official regulations mandate that medicines must be labeled with all adverse reactions that were documented during clinical trials and subsequent post-marketing surveillance. This ensures the documentation reflects all adverse reactions reported during clinical development and surveillance, consistent with regulatory requirements.

Q: How quickly should someone expect Deprexolet to start working?

A: Official documents do not provide a specific, guaranteed timeline for when a person will experience the full therapeutic effect. The short-term clinical trials used to establish the evidence for this medicine generally lasted between 3 to 12 weeks. Clinical response varies across individuals.

Q: Is Deprexolet a medication that must be taken every day?

A: Official guidelines outline the administration protocol as a daily schedule when treatment is commenced. Maintenance treatment, which is continued for a period after symptoms improve, is typically continued on a daily basis for several months.

Q: Will I experience withdrawal symptoms if I stop taking Deprexolet?

A: Official regulatory labeling describes withdrawal symptoms in adults as an adverse reaction, for which the frequency is currently categorized as unknown. Furthermore, the labeling describes the potential for withdrawal symptoms in neonates whose mothers received the medicine during pregnancy.

Q: Are there specific symptoms that mean I should call a doctor immediately after taking Deprexolet?

A: Official labeling details conditions under which immediate consultation with a healthcare professional and withdrawal of the medicine is specified. These include signs of infection, such as a high fever or sore throat, as well as jaundice (yellowing of skin or eyes), cramps (seizures), or hypomania (abnormally elevated or excited mood).

Q: Does taking Deprexolet mean I can't drive a car?

A: Official labeling provides a specific warning about activities that require high mental alertness. Due to the potential for fatigue and impaired reaction capacity, especially during the initial phase of treatment, official regulatory information advises against driving vehicles or operating machinery.

Q: Is Deprexolet known to cause mood swings?

A: Regulatory information notes that this medicine, similar to other antidepressants, may accelerate the occurrence of hypomania in susceptible subjects. Hypomania is officially described as a state of abnormally elevated or excited mood.

Q: Why is it important to tell my doctor about all supplements I take with Deprexolet?

A: The regulatory prescribing information requires informing a healthcare professional about all concomitant therapies, including any supplements or other products. This practice is necessary because supplements and other products have the potential to cause adverse interactions or modify the effects of the medicine.

Q: What is the difference between Deprexolet and other common medicines in the same class?

A: Regulatory information classifies Deprexolet (Mianserin) as an atypical antidepressant due to its unique way of working in the brain. Unlike some older medicines in the same category, it is described as lacking strong anticholinergic properties. This difference in its mechanism helps distinguish it from some other treatments.

How should Deprexolet be stored and disposed of?

The storage and disposal of Deprexolet (Mianserin hydrochloride tablets) must adhere strictly to the conditions specified in the official regulatory labeling.

Storage Requirements

Detail Official Regulatory Wording
Temperature Store below 25 C or 30 C (depending on the product license).
Protection Protect from light and moisture; do not freeze.
Container Rule Store in the original container or blister packaging.
Child Safety Keep out of the sight and reach of children.

Disposal Requirements

Unused or expired Deprexolet must be disposed of according to local regulations. The preferred method is to utilize a drug take-back program or authorized collection site. Disposal via wastewater (flushing or pouring down the sink) is prohibited unless specific instructions on the medicine’s labeling state otherwise. If a take-back option is unavailable, the product may be mixed with an undesirable substance (e.g., used coffee grounds) and sealed before placing it in the trash, as per government guidelines.

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

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