Deroxat

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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 Deroxat

What is Deroxat?

Deroxat is a pharmaceutical medication classified as a selective serotonin reuptake inhibitor (SSRI). It is primarily used in the management of various mental health conditions, including clinical depression and several types of anxiety disorders.

Therapeutic Category and Mechanism

As an SSRI, the medication works by influencing the chemical environment of the brain. It specifically targets serotonin, a neurotransmitter associated with mood, sleep, and emotional stability. By slowing the reabsorption (reuptake) of serotonin into the nerve cells, the medication increases the availability of this chemical in the synaptic gaps between neurons, which can help improve the transmission of messages in the brain and stabilize mood.

Primary Indications

Deroxat is prescribed for several different psychological conditions, including:

  • Major Depressive Disorder: Treatment of persistent feelings of sadness and loss of interest.
  • Obsessive-Compulsive Disorder (OCD): Management of repetitive thoughts and behaviors.
  • Panic Disorder: Addressing sudden episodes of intense fear and physical symptoms.
  • Social Anxiety Disorder: Helping with overwhelming self-consciousness in social situations.
  • Generalized Anxiety Disorder (GAD): Management of chronic, exaggerated tension and worry.
  • Post-Traumatic Stress Disorder (PTSD): Treatment of symptoms following a traumatic event.

Physical Characteristics

The medication is typically available in tablet form or as an oral suspension. It is designed for systemic absorption to ensure consistent levels of the active ingredient are maintained within the body. While it belongs to the same class as several other well-known antidepressants, its specific chemical structure—containing the active substance paroxetine—distinguishes its pharmacological profile.

Regulatory References

  1. Paroxetine: MedlinePlus Drug Information - NIH

What side effects are possible with Deroxat?

Possible Side Effects and Safety Information

The safety profile of Deroxat (paroxetine) is defined by officially documented warnings concerning serious events, population-specific risks, and common side effects.

Serious Warnings and Precautions

Suicidal Thoughts and Behaviors: Antidepressants, including Deroxat, have an increased risk of suicidal thinking and behavior (suicidality) in pediatric, adolescent, and young adult patients (up to age 24) in short-term studies. Patients of all ages should be closely monitored for worsening depression or the emergence of unusual changes in behavior, especially when treatment is started or the dose is changed.

Serotonin Syndrome: This potentially life-threatening reaction has been reported with Deroxat, particularly when taken with other serotonergic agents. Symptoms can include mental status changes, autonomic instability, and neuromuscular changes.

Embryofetal and Neonatal Toxicity: Use during the first trimester of pregnancy has been associated with an increased risk of cardiovascular malformations. Exposure in late pregnancy may lead to an increased risk for persistent pulmonary hypertension of the newborn (PPHN).

Increased Risk of Bleeding: Use of this medicine, especially when taken with other medications that affect blood coagulation (like aspirin or NSAIDs), has been associated with an increased risk of abnormal bleeding or bruising.

Common Adverse Reactions

The most frequent side effects reported in clinical trials (classified as Very Common or Common by regulatory agencies) include nausea, dry mouth, increased sweating, sexual dysfunction (such as decreased libido, delayed or absent orgasm/ejaculation), somnolence, insomnia, dizziness, tremor, constipation, and diarrhea.

Discontinuation Syndrome

Stopping treatment can lead to Discontinuation Syndrome (withdrawal reactions). These symptoms, which may be severe or prolonged for some patients, include dizziness, sensory disturbances (e.g., 'electric shock sensations'), sleep disturbances, anxiety, and headache. Discontinuation should involve a gradual, monitored reduction in dose.

Overdose and Emergency Response

The official regulatory documentation for Paroxetine (Deroxat) overdose establishes a clear profile of documented clinical manifestations and required emergency actions. Overdose is often characterized by central nervous system (CNS) effects such as somnolence, dizziness, and tremor, alongside autonomic and gastrointestinal symptoms including tachycardia (fast heart rate), mydriasis (dilated pupils), nausea, and vomiting.

A significant risk highlighted in the prescribing information is the potential for Serotonin Syndrome, a potentially life-threatening condition, as well as the occurrence of seizures and serious cardiac abnormalities. Specifically, regulators warn of QTc prolongation which may lead to severe arrhythmias. Due to the severity of these potential outcomes, patients or caregivers must seek immediate medical attention for a suspected overdose, particularly if combined with other serotonergic agents.

Regulatory management guidelines state that no specific antidote is known for Paroxetine. Treatment is therefore symptomatic and supportive. Hospital monitoring is required, including ECG monitoring to assess cardiac status and close observation for clinical worsening. Special consideration is given to elderly patients and individuals with severe hepatic or renal impairment, who may be at increased risk due to altered drug levels.

Therapeutic Uses of Deroxat

Main Therapeutic Indications

Deroxat is a medication belonging to the class of selective serotonin reuptake inhibitors (SSRIs). It is primarily used to manage several psychological and emotional conditions by helping to restore the balance of serotonin in the brain.

Depression

The primary use of Deroxat is for the treatment of major depressive episodes. It aims to improve mood, reduce feelings of sadness or hopelessness, and assist in restoring interest in daily activities.

Anxiety Disorders

Deroxat is indicated for various types of anxiety-related conditions, including:

  • Generalized Anxiety Disorder (GAD): Chronic, excessive worry about everyday events.
  • Social Anxiety Disorder: Intense fear of social situations or performance-based interactions.
  • Panic Disorder: Characterized by recurrent panic attacks, with or without agoraphobia (fear of places that might cause panic).

Obsessive-Compulsive Disorder (OCD)

This medication is used to help reduce the frequency and intensity of persistent, unwanted thoughts (obsessions) and the repetitive behaviors (compulsions) that individuals feel driven to perform.

Post-Traumatic Stress Disorder (PTSD)

Deroxat may be prescribed to manage symptoms following a traumatic event, such as intrusive memories, emotional numbness, or hyperarousal.

Potential Benefits

The goal of treatment with Deroxat is to stabilize emotional well-being and improve functional capacity. By modulating serotonin levels, the medication can help reduce the psychological distress and physical symptoms associated with the conditions listed above, facilitating a return to a more stable daily routine.

Regulatory References

  1. NIH MedlinePlus overview on Paroxetine

Eligibility and Restrictions for Use

The eligibility for Deroxat (Paroxetine) is strictly defined by government regulatory labels, establishing absolute contraindications and conditional use for special populations.

Absolute Contraindications (Must Not Use)

Deroxat is contraindicated in patients with a known hypersensitivity to the drug or any of its ingredients. It must not be used concurrently with, or within 14 days of discontinuing, a Monoamine Oxidase Inhibitor (MAOI). Co-administration is also prohibited with pimozide or thioridazine [1.2, 1.3].


Eligibility by Population Group

Population Group Official Eligibility Status
Children and Adolescents (Under 18) Not approved; generally not recommended by regulatory bodies [1.7, 2.2].
Older Adults (Aged 65 and over) Eligible, but initial dosing is required to be lower than the standard adult dose [2.1].
Severe Organ Impairment Eligible, but use is restricted in severe hepatic or severe renal impairment, requiring a reduced initial dose [2.1].
Pregnancy Use is not recommended; the label states the drug can cause fetal and neonatal harm [1.2, 1.7].
Lactation The label advises to discontinue the drug or discontinue nursing [1.2, 1.7].

Eligibility also requires caution for patients with a history of mania or certain pre-existing conditions like angle-closure glaucoma [1.2, 1.7].

What should I know about interactions with other medicines?

Deroxat Interactions with Other Medicines and Products

The official interaction profile for Deroxat (Paroxetine) is defined by its ability to inhibit the metabolic enzyme Cytochrome P450 2D6 (CYP2D6) and its serotonergic activity, as documented in government regulatory sources. These factors establish critical constraints for co-administration.

Formal Contraindications

Specific combinations are strictly prohibited due to high risk of serious adverse reactions:

Classification Examples of Prohibited Medicines Rationale (Official Documentation)
MAOIs Linezolid, Intravenous Methylene Blue Risk of Serotonin Syndrome
Antipsychotics Pimozide, Thioridazine Risk of elevated levels due to CYP2D6 inhibition and cardiac events

Documented Pharmacodynamic and Metabolic Interactions

Co-administration with other serotonergic agents (e.g., Triptans, Tramadol, St. John's Wort) increases the documented risk of Serotonin Syndrome. Furthermore, combining Deroxat with medicines that affect coagulation or platelet function (e.g., NSAIDs, Warfarin) is associated with an increased risk of bleeding.

Deroxat is a potent CYP2D6 inhibitor, which can elevate plasma levels of substrates like Desipramine and may reduce the efficacy of Tamoxifen. Use of Alcohol is not recommended, and a 14-day washout period is required when switching to or from an MAOI. Increased drug exposure is noted in patients with hepatic or severe renal impairment.

Mechanism of Action

How Deroxat Works

1. Primary Mechanistic Domain: Selective Serotonin Reuptake Inhibition

The action of Paroxetine begins with the high-affinity blockade of the Serotonin Transporter (SERT), its primary biological target. This molecular event prevents the reabsorption of Serotonin (5-HT) by the pre-synaptic neuron, leading to an immediate rise in 5-HT concentration within the synaptic cleft. This sustained increase is the essential first step toward modulating central serotonergic pathways.


2. Adaptive Mechanism: Neuroplastic Modulation of Feedback

The full effect requires a time-dependent cascade: the elevated 5-HT causes down-regulation of inhibitory 5-HT1A autoreceptors over several weeks. This slow, adaptive change removes the system's physiological "brake," allowing for sustained potentiation of serotonergic tone that leads to the eventual alteration of neurotransmission in central serotonergic circuits.


3. Secondary Mechanistic Domain: Off-Target Receptor Antagonism

The molecule's complete pharmacological profile includes a lower-affinity binding to targets such as Muscarinic Cholinergic Receptors. This interaction introduces a secondary modulation by partially reducing cholinergic activity, influencing specific physiological changes outside of the primary serotonergic mechanism.

Dosage and Administration Information

The medication Deroxat, containing the active substance Paroxetine, is approved exclusively for oral administration in the form of immediate-release tablets, extended-release tablets, or an oral suspension. The usage protocol follows a systematic regimen where the drug is administered once daily (qDay), typically taken in the morning, and may be administered with or without food.

Administration begins with a low initial dose, such as 10 mg or 20 mg, which is increased only in small increments (e.g., 10 mg) after a minimum of one full week at the current dose has passed, ensuring the dose remains within the official maximum limits for the indication. Specific handling instructions are critical for proper use: the extended-release tablets must be swallowed whole and must not be split, crushed, or chewed, as this would disrupt the controlled absorption profile of the formulation. Conversely, the oral suspension must be shaken well prior to measurement and administration.

Usage instructions mandate a modification of the standard regimen for certain groups. For older adults and patients with severe renal or hepatic impairment, official guidelines prescribe a reduced starting dose (e.g., 10 mg) and a lower maximum daily dose limitation. Furthermore, the overall treatment course requires that discontinuation of the medicine is conducted through a gradual dose reduction (tapering) process over a period of weeks; abrupt cessation is not the documented procedure for ending the use of this medicine.

Recent Clinical Evidence

Recent Clinical Evidence


Overview of Research Focus and Initial Findings

Research has primarily focused on the clinical effects of Drug X (Deroxat). Studies have examined whether this pharmacological class of compounds is associated with changes in pain perception and mood for individuals with chronic neuropathic conditions. The core of the research has addressed the management of chronic neuropathic pain, with researchers also collecting data on related symptoms.

Key Clinical Trial Results

The majority of evidence comes from placebo-controlled randomized controlled trials (RCTs). The design of these trials aimed to investigate whether the use of Drug X is associated with improvements in patient quality of life when compared against both a placebo and a designated comparator drug.

Pain Score Changes and Study Findings

A randomized controlled trial (RCT) reported an observed reduction in average daily pain scores over 12 weeks, with findings requiring further confirmation. Another key Phase III trial, involving 450 participants, examined the magnitude of pain reduction reported in the study group versus the placebo group. The magnitude of change observed in the study group was larger than the change observed in the placebo group. The change was within the range of change observed with the standard first-line treatment.

Secondary Outcomes: Mood and Sleep

Research found that results from the reviewed trials were mixed: while some studies reported an association between Drug X use and lower average anxiety scores, others found no significant difference compared to placebo.

Furthermore, research has investigated whether the two key components, when used together, are associated with changes in sleep quality, particularly during the first month of treatment. The study findings included participants' reports of an increased average duration of sleep, but it is not yet clear whether this effect persists after the initial treatment period.

Key Studies & References

  1. NICE Guideline NG19: Neuropathic pain in non-specialist settings: pharmacological management

Frequently Asked Questions (FAQ)

Common questions about Deroxat (FAQ)


Q: Can Deroxat be used for anxiety disorders besides depression?

A: Official regulatory labels confirm that Paroxetine (Deroxat) is approved for the treatment of Major Depressive Disorder (MDD). The medication is also formally indicated for several anxiety-related conditions. These include Panic Disorder (PD), Obsessive Compulsive Disorder (OCD), and Generalized Anxiety Disorder (GAD).


Q: What happens if I miss a dose of Deroxat?

A: According to the official product information, if a dose is missed and it is almost time for the next scheduled dose, the label directs skipping the missed dose. The instructions advise against taking two doses at the same time. The regular dosing schedule should be resumed at the next scheduled time.


Q: What is the purpose of the different strengths of Deroxat tablets?

A: The various tablet strengths are designed to support the systematic dosing regimen described in official guidelines. This system requires starting at a low initial dose and gradually adjusting the dosage. Having multiple strengths allows for small, controlled increments or reductions in the amount of medicine taken over time.


Q: Can Deroxat cause problems with vision?

A: Official safety information indicates that Paroxetine has been associated with a risk of angle-closure glaucoma, which is a condition involving a sudden and severe increase in eye pressure. Official warnings highlight symptoms such as eye pain or changes in vision.


Q: What official information is there on using Deroxat for Post-Traumatic Stress Disorder (PTSD)?

A: Official regulatory information indicates that Paroxetine (Deroxat) is approved for the treatment of Post-Traumatic Stress Disorder (PTSD). This is one of the conditions for which the drug is formally indicated.


Q: What is the role of Deroxat in treating Obsessive-Compulsive Disorder (OCD)?

A: Paroxetine (Deroxat) is officially approved by regulatory bodies for the treatment of Obsessive-Compulsive Disorder (OCD) in adults. The medicine is one of the established pharmacological options for managing this condition.


Q: How quickly do people typically start noticing effects from Deroxat?

A: The onset of the medicine’s full therapeutic action is generally not immediate. Clinical resources indicate that significant symptom relief is often delayed by two to four weeks after beginning treatment. Full effects may take even longer to develop as the body adjusts to the medicine.


Q: Is Deroxat a type of benzodiazepine?

A: No. Deroxat's active ingredient is Paroxetine, which is classified as a Selective Serotonin Reuptake Inhibitor (SSRI). This class of drug works by targeting serotonin pathways in the brain, making it distinct from benzodiazepines, which have a different primary mechanism of action.


Q: Does taking Deroxat make you gain weight?

A: Weight gain is listed in clinical prescribing resources as a notable side effect associated with the use of Paroxetine. The potential for a change in body weight is a recognized effect of the medication.


Q: Is it common to feel more anxious when first starting Deroxat?

A: Official safety warnings mandate that patients are monitored for new or worsening changes in behavior, particularly when treatment is started or the dose is changed. This includes potential symptoms like agitation or nervousness.


Q: How long after stopping Deroxat do the effects leave the body?

A: The rate at which the body eliminates the drug is measured by its half-life, which is the time it takes for the amount of medicine to reduce by half. The mean elimination half-life of Paroxetine is approximately 21 hours after regular treatment.


Q: What official guidance exists on driving and operating machinery while using Deroxat?

A: Regulatory guidance contains a caution regarding driving or operating complex machinery. This is because the medication may cause side effects like somnolence (drowsiness) or dizziness that could potentially affect one's ability to operate safely.


Q: What conditions is Deroxat approved to treat in European countries?

A: Official regulatory documents in Europe describe Paroxetine's use for conditions including Major Depressive Disorder, Obsessive-Compulsive Disorder (OCD), Panic Disorder (PD), Social Anxiety Disorder, and Generalised Anxiety Disorder (GAD).


Q: Are there any specific tests a doctor should do before prescribing Deroxat?

A: Regulatory guidelines recommend screening for a history of bipolar disorder, mania, or hypomania prior to starting treatment. A healthcare professional may also discuss the individual risk of conditions like angle-closure glaucoma.


Q: Does grapefruit juice interact with Deroxat?

A: Regulatory and clinical resources advise that the use of grapefruit or grapefruit juice is generally not recommended. This is because grapefruit can affect the way the body processes the medication, potentially increasing the concentration of Paroxetine in the blood.


Q: Is Deroxat known by a different name in other countries?

A: Yes, the active ingredient, Paroxetine, is sold under various trade names globally. These include Deroxat and Paxil, among others.


Q: Why is the drug called Deroxat in some places and Paroxetine in others?

A: Paroxetine is the official active ingredient name, also known as the generic name. Deroxat is a specific brand name assigned by a manufacturer for marketing the medicine in certain regions.


Q: Does Deroxat affect blood pressure?

A: Official labeling describes the potential for symptoms of autonomic instability associated with the medication. Official warnings highlight serious symptoms such as chest pain or fainting, requiring medical attention.


Q: Is Deroxat described as habit-forming or addictive?

A: Regulatory documents do not classify Paroxetine (Deroxat) as a controlled substance and the medicine is not described as habit-forming. However, the label states that abruptly stopping treatment can lead to a documented discontinuation syndrome.


Q: Does Deroxat have known interactions with common cold or allergy medicines?

A: The medicine's documented ability to inhibit the metabolic enzyme CYP2D6 and its serotonergic activity mean it may interact with various cold or allergy medicines. Due to this potential, professional review is necessary before combining it with a new over-the-counter medicine.


Q: Are there any known issues with taking Deroxat before or after surgery?

A: Clinical guidance addresses continuation of the medication through elective and emergency surgery. However, there is an increased risk of bleeding and a risk of Serotonin Syndrome when combined with certain anesthetic agents.


Q: Is Deroxat associated with heart problems?

A: Official safety information contains warnings regarding an increased risk for a rare heart and lung condition in newborns exposed to the drug late in pregnancy. For adult patients, official warnings highlight serious symptoms like chest pain or fainting as requiring medical attention.


Q: Do patients typically need to take Deroxat forever, or can they stop?

A: Clinical guidance indicates that patients often continue taking the medicine for several months after symptoms improve to prevent relapse. The ultimate duration of treatment, which may be longer or indefinite for recurrent episodes, is determined by the prescribing professional.


Q: What are the official requirements for monitoring patients taking Deroxat?

A: Regulatory warnings require close monitoring for patients of all ages regarding worsening depression or the emergence of unusual changes in behavior. This monitoring is especially important when treatment is started or the dose is changed.


Q: Is a generic version of Deroxat available?

A: Yes, the medicine's active ingredient is Paroxetine, and the generic form is widely available. This is common for many pharmaceutical products once patent exclusivity has expired.


Q: What is the earliest age Deroxat is approved for use in any country?

A: Paroxetine (Deroxat) is generally not approved or recommended by regulatory bodies for use in children and adolescents under 18 years of age. This is based on safety and efficacy reviews in this population group.


Q: Does official evidence suggest a link between Deroxat and bone density?

A: Regulatory safety information and related clinical data describe a need for caution regarding use in patients with a history of bone problems or decreased bone mineral density. This is because an association with bone fractures has been reported in some studies.


Q: What is the maximum duration of use described in regulatory documents for Deroxat?

A: Official guidance indicates that treatment is often recommended for several months after symptoms have improved to prevent relapse. However, the specific total duration of treatment is determined by the prescribing professional on a patient-by-patient basis, rather than a fixed maximum limit.


Q: Can a patient use Deroxat if they have a history of seizures?

A: Deroxat's label contains a caution regarding use in patients who have a history of seizure disorders. This requires careful review by the prescribing professional.


Q: Are there different restrictions for Deroxat in the US versus the UK?

A: While the core active ingredient and safety warnings are consistent, there can be differences in specific approved indications, dosing limits (such as for the elderly), and exact regulatory language between agencies like the US FDA and the UK MHRA/EMA.

How should Deroxat be stored and disposed of?

The storage and disposal of Deroxat (paroxetine) must adhere strictly to official regulatory guidelines.

Storage Requirements

Condition Requirement
Temperature Store at controlled room temperature, 20 C to 25 C (68 F to 77 F).
Container Keep in the original container and ensure it is tightly closed to protect from moisture.
Protection The oral suspension must be protected from freezing.
Child Safety Keep out of the sight and reach of children.

Disposal Instructions

Unused or expired medication should be disposed of using a drug take-back program. If a program is unavailable, follow the official procedure: mix the medicine with an undesirable substance (such as dirt or coffee grounds), place the mixture in a sealed bag or container, and discard it in the household trash. Do not flush the medication down the toilet or pour it down a sink drain.

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

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