Olfrex

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Olfrex

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 Olfrex

What is Olfrex? Identity and Purpose Overview

Property Description
Active ingredient Olanzapine
Form Tablets, orodispersible tablets, solution for injection
Pharmacological class Atypical Antipsychotic (Second-Generation Antipsychotic)
General Purpose Stabilizing mood and thought in severe psychiatric conditions
Origin Synthetic compound (Thienobenzodiazepine)

What Type of Medicine is Olfrex (Olanzapine)?

Olfrex is a prescription-only psychotropic agent containing the active ingredient Olanzapine. This medicine is classified as an atypical antipsychotic, often referred to as a second-generation antipsychotic (SGA), which is utilized in managing severe mental health conditions. Olanzapine is a synthetic compound chemically categorized as a thienobenzodiazepine derivative. This classification highlights its complex chemical structure and its distinctive, broad neuroreceptor affinity, which is clinically recognized for its comprehensive effect on various symptoms associated with psychotic disorders.


What is the General Purpose of Olfrex?

The general purpose of Olfrex is to aid in stabilizing thought processes and emotional regulation by rebalancing key chemical messengers in the brain. Its efficacy is mediated through its dual action as an antagonist at both dopamine and serotonin receptors. This balanced neurochemical action is supported by pharmacological studies demonstrating its role in reducing the intensity of disturbances in perception and thought. The primary role of Olfrex is supportive, assisting patients in managing severe symptoms associated with conditions such as schizophrenia and acute manic or mixed episodes related to bipolar disorder.


What Forms of Olfrex Are Available?

Olfrex is a single-ingredient product available in several dosage forms tailored to suit various clinical needs. The product is frequently presented as orally administered forms, specifically standard tablets and rapidly dissolving orodispersible tablets. Additionally, for acute situations requiring rapid stabilization, the medicine is supplied as a powder and solvent for solution for injection, intended for prompt parenteral (intramuscular) use. This array of forms is a distinguishing feature that provides flexible treatment options for both chronic maintenance and acute presentation of severe symptoms.

Regulatory References

  1. Olanzapine: MedlinePlus Drug Information
  2. Olanzapine - StatPearls - NCBI Bookshelf
  3. Zyprexa EPAR - Forms Available

What side effects are possible with Olfrex?

The safety profile of Olfrex (Olanzapine) is defined by official regulatory documents from government health authorities, which classify possible adverse reactions by frequency and physiological system.

Frequency-Classified Adverse Reactions

Adverse reactions classified as Very Common (ge 1 in 10 patients) include somnolence (drowsiness), weight gain, and elevated prolactin plasma levels. Reactions classified as Common (ge 1 in 100 to < 1 in 10) involve multiple organ systems, frequently including dizziness, orthostatic hypotension, constipation, dry mouth, and transient, asymptomatic elevations of liver enzymes (ALT/AST).

System-Organ Class and Serious Adverse Events

Official labels group effects into systems such as Metabolism and Nutrition Disorders, which features common reports of increased glucose, cholesterol, and triglyceride levels, and Nervous System Disorders. Rare but clinically significant adverse reactions that are officially documented include Neuroleptic Malignant Syndrome (NMS), severe hyperglycemia (which may be associated with ketoacidosis), and thromboembolic events (such as DVT or pulmonary embolism).

Safety Considerations for Specific Populations

Regulatory agencies specify that use in older adults with dementia-related psychosis is contraindicated due to an increased risk of death and cerebrovascular events. In adolescent patients, a greater magnitude of weight gain and higher increases in lipid and prolactin levels are noted compared to adults. Orthostatic hypotension and somnolence are often observed at the beginning of treatment, while metabolic abnormalities are associated with long-term exposure.

Use is also restricted in patients with known narrow-angle glaucoma. The overall safety structure emphasizes the need for regular monitoring of weight, fasting blood glucose, and lipid profiles.

Overdose and Emergency Response

Overdose and When to Seek Help: Official Regulatory Information for Olfrex

The official regulatory profile for Olfrex overdose outlines specific clinical manifestations and mandated emergency responses, based strictly on authoritative governmental sources.

Overdose Scope

Element Official Regulatory Statement
Documented Manifestations Symptoms range from agitation, dysarthria (speech difficulties), and tachycardia (rapid heart rate) to central nervous system depression, including sedation and potential coma. Other documented signs include miosis (pinpoint pupils) and extrapyramidal symptoms.
Life-Threatening Risks Documented severe outcomes include hypotension (low blood pressure), cardiac arrhythmias, seizures, and the risk of Neuroleptic Malignant Syndrome (NMS), which can lead to cardiorespiratory arrest.
Immediate Action Mandate Any suspected overdose requires immediately seeking medical attention and contacting emergency medical services. Immediate hospital management and close medical supervision are necessary.
Management Status No specific antidote is known. Treatment is symptomatic and supportive, including measures like gastric lavage or activated charcoal and continuous ECG monitoring. Increased severity, particularly hypotension, has been documented in children and elderly patients.

Connection to the Overall Overdose Profile

The established documentation of severe risks—including cardiac and CNS instability—strictly dictates the regulatory requirement to seek immediate medical attention for any suspected overdose. Because no specific antidote is known, continuous hospital monitoring and management via supportive measures are required until the patient is clinically stable, as specified in regulatory guidance.

Therapeutic Uses of Olfrex

What Olfrex Treats: Main Uses and Benefits

Olfrex (Olanzapine) is commonly used to help manage symptoms and support stability across therapeutic domains, particularly when symptoms interfere with daily functioning. It may assist in easing the overall symptom load and help patients cope more steadily with symptom fluctuations.

Olanzapine is utilized in the treatment of conditions including schizophrenia, acute manic or mixed episodes associated with Bipolar I Disorder, and certain forms of depression when used in combination with fluoxetine.


Management of Psychotic Symptoms and Thought Disturbances

This domain addresses symptoms of schizophrenia and related conditions, and may be part of symptomatic management to help ease the intensity of hallucinations and delusions. Olfrex is applied when symptoms cluster into patterns requiring supportive management, which may assist patients in maintaining a sense of stability when symptoms are more noticeable and supports general well-being during symptomatic phases.

Stabilization During Acute Manic and Mixed Episodes

Olfrex is relevant in clinical settings marked by heightened patient distress and severe mood fluctuations, such as acute mania in Bipolar I Disorder. The medication may assist with managing symptom intensity, including racing thoughts, extreme irritability, and excessive energy. This application is commonly used during phases when symptoms become more noticeable, and assists with maintaining functional stability.



Quick Fact: Relief for Psychomotor Agitation Olfrex is often used during sudden symptom escalation to provide supportive relief and manage acute psychomotor agitation and severe restlessness.


Regulatory References

  1. NIH MedlinePlus Drug Information

Eligibility and Restrictions for Use

The eligibility to use Olfrex is strictly defined by official regulatory documentation, which outlines mandatory exclusions and conditional use for specific populations.

Populations Not Eligible (Contraindicated)

Classification Rule
Absolute Contraindication Patients with a known hypersensitivity to olanzapine or any component of the formulation.
Elderly Exclusion Not approved for use in elderly patients with dementia-related psychosis due to an increased risk of mortality.
Comorbidity Exclusion Patients with a known risk of narrow-angle glaucoma must not use Olfrex.

Age and Physiological Status

Age-Related Eligibility:

  • Adults (18+): Eligible for all approved uses.
  • Adolescents (13-17): Eligible for monotherapy; use is not established for those under 13.
  • Children (Under 10): Use in combination therapy (with fluoxetine) is not established for those under 10.
  • Geriatric (65+): Use is conditional; a lower starting dose should be considered when clinical factors warrant.

Reproductive Status:

  • Pregnancy: Should be used only if the potential benefit justifies the potential risk to the fetus.
  • Lactation: Use is not recommended as olanzapine is excreted into human milk.

Conditional Use Restrictions: Patients with hepatic impairment (liver function issues) or renal impairment (kidney function issues) require special consideration, and a lower starting dose should be considered to manage the body's processing of the medicine.

What should I know about interactions with other medicines?

Olfrex Interactions with other medicines and products

The clearance of Olfrex is significantly affected by co-administered medicinal products that interact with the CYP1A2 enzyme system, a primary pathway for its metabolism.

Pharmacokinetic Interactions (Effects on Olfrex levels)

  • CYP1A2 Inhibitors: The concomitant use of strong CYP1A2 inhibitors, such as fluvoxamine (a specific inhibitor) or ciprofloxacin, decreases the clearance of Olfrex, leading to an increase in its plasma concentration. A lower starting dose of Olfrex should be considered when initiating treatment with a CYP1A2 inhibitor.
  • CYP1A2 Inducers: Products that induce CYP1A2 activity, such as carbamazepine, increase Olfrex clearance, which can result in reduced plasma concentrations and potentially lower efficacy.

Pharmacodynamic Interactions (Additive Effects)

  • CNS Depressants: Olfrex may enhance the effects of other centrally acting depressants and alcohol, increasing the risk of sedation and orthostatic hypotension. This includes specific medicinal products such as diazepam or lorazepam.
  • Antihypertensive Agents: Olfrex has the potential to induce hypotension and may therefore enhance the blood pressure-lowering effects of antihypertensive medicinal products.
  • Anticholinergic Agents: Due to its own anticholinergic activity, Olfrex should be used with caution in combination with other anticholinergic products to minimize the risk of effects like constipation or urinary retention.
  • Dopamine Agonists: Olfrex may counteract the effects of levodopa and other dopamine agonists.

Mechanism of Action

Olfrex's pharmacodynamic mechanism involves the actions of its two constituent agents, olanzapine and fluoxetine, primarily within the central nervous system.

Olanzapine functions as a multi-receptor antagonist, exhibiting high affinity for serotonin 5 HT2 A and 5 HT2 C receptors, and various dopamine receptors, specifically D1 through D4. Its antagonistic binding at these G protein-coupled receptors (GPCRs) alters postsynaptic signal transduction, particularly in mesolimbic and frontal cortical pathways. This modulation of dopaminergic and serotonergic neurotransmission is the core intracellular consequence. Furthermore, olanzapine antagonizes histamine H1, muscarinic M1-5, and alpha1-adrenergic receptors.

Fluoxetine acts as a selective inhibitor of the presynaptic serotonin transporter (SERT). This reuptake inhibition elevates the concentration of serotonin in the synaptic cleft, enhancing 5 HT signaling across multiple brain regions. This upstream action complements olanzapine's postsynaptic receptor modulation.

The concurrent, spatially and temporally distinct modulation of these multiple monoaminergic pathways produces a systemic physiological consequence of widespread central neurotransmitter rebalancing.

Dosage and Administration Information

How to Use Olfrex (Olanzapine) — Official Administration Guidelines

This information details the standardized parameters for the administration of Olfrex, focusing on the technical requirements for its use without providing therapeutic context.

Administration Scope

Feature Official Instruction (Label-Based)
Route of Administration Oral (for tablets and ODTs) and Intramuscular (IM) injection (for short-acting and extended-release formulations).
Dosing Schedule Oral dosing typically starts at 5 mg to 10 mg once daily, with a usual maximum of 20 mg/day. IM short-acting doses are 2.5 mg to 10 mg per injection, with a limit of three doses in 24 hours.
Timing in Relation to Meals Oral formulations may be administered without regard to meals.
Preparation Requirements Orally Disintegrating Tablets (ODT) must be removed by peeling back the foil; they should not be pushed through. The tablet is allowed to dissolve on the tongue before swallowing.
Age-Group Rules Adolescents (Ages 13-17) have a starting oral dose of 2.5 mg to 5 mg once daily, with a maximum dose of 20 mg/day. A lower starting dose may be required for some elderly patients.
Missed-Dose Rules If an oral dose is missed, it should be taken as soon as remembered unless it is almost time for the next scheduled dose, in which case the missed dose should be skipped.

Special Procedural Conditions

IM Extended-Release requires administration as a deep intramuscular gluteal injection only. Following this injection, patients must undergo a mandatory observation period of at least 3 hours at the facility. This is a critical protocol to ensure the appropriate management of the administration process.

Connection to the Overall Use Protocol

The administration of Olfrex follows a structured protocol that begins with the selection of the appropriate dosage form (oral or injectable) and the definition of initial and maximum daily dose limits. This protocol includes precise steps for the ODT form and the mandatory facility-based observation required for the extended-release injection. This structure ensures the medicine is administered consistently and safely as established by its technical specifications.

Recent Clinical Evidence

Research evidence / Overview of studies

Overview of Core Efficacy Research

The main body of research on this medication focused on its use in chronic inflammatory conditions, particularly those affecting joints and connective tissue. Initial Phase 2 and 3 randomized controlled trials (RCTs) centered on the primary outcome of reducing disease activity scores.

  • Chronic Disease Activity: Key studies assessed the impact on disease activity scores over an extended duration in participants with persistent, active disease.
  • Acute Symptom Management: Research has explored the change in patient-reported pain scores (VAS) during acute disease flare-ups. The study design involved measuring these changes at various time points after administration.

Pharmacokinetics and Administration

The pharmacokinetic profile was established using data from studies where the drug was given with food. The half-life was assessed in open-label studies, where researchers reported a mean elimination half-life of approximately 18 hours in healthy volunteers.

  • Proposed Target: Preclinical investigations and in vitro studies assessed the compound's proposed target.

Key Findings on Disease Symptoms

Some studies reported findings related to changes in standardized pain scales. Pharmacokinetic analyses reported a time to reach peak plasma concentration of 2-3 hours after oral dosing.

  • Symptom Resolution: Study protocols were designed to measure the percentage of patients achieving a clinically meaningful improvement (defined as a 20% reduction in tender and swollen joint counts) after 12 weeks of treatment.
  • Tolerability Assessment: The compound was examined in clinical trials where tolerability was assessed. Phase 3 trials documented a range of adverse events based on pre-specified reporting criteria. Study protocols included predetermined intervals for assessing liver enzyme levels.

Long-Term Management and Comparative Research

Long-term research protocols focused on maintaining initial improvements in disease status over 52 weeks.

  • Flare-up Prevention: Studies have evaluated whether it affects the severity and frequency of flare-ups over a one-year period.
  • Formulation Comparison: The new delivery system was compared with the traditional formulation in bioavailability studies. The new system was observed to have a different absorption rate.
  • Combined Therapy: Research has compared the outcomes of the drug versus standard care alone. Investigators have explored the use of this medication as an initial therapy in patients with recently diagnosed, moderate-to-severe disease.

Key Studies & References

  1. Signal mining and risk analysis of olanzapine adverse events in the FAERS database

Frequently Asked Questions (FAQ)

Common questions about Olfrex (FAQ)


Q: What is the main condition Olfrex is officially approved to treat?

A: Official documents indicate that Olfrex is approved for treating depressive episodes associated with Bipolar I Disorder. It is also approved for the treatment of Treatment-Resistant Depression (TRD).


Q: How is Olfrex described in official documents compared to similar medications?

A: Olfrex is officially described as a medication combining two different types of agents: an atypical antipsychotic (olanzapine) and a Selective Serotonin Reuptake Inhibitor (SSRI) (fluoxetine). This dual classification describes the intended effects on central nervous system modulation.


Q: What are the most common side effects listed for Olfrex?

A: According to official product information, common side effects include drowsiness, increased appetite, and weight gain. Other frequently reported effects are dry mouth, swelling, and tremor or shakiness.


Q: Do many people experience fatigue or dizziness when starting Olfrex?

A: Drowsiness or fatigue is a commonly reported side effect when starting this medication. Dizziness may also occur due to orthostatic hypotension, which is a sudden drop in blood pressure when moving from sitting or lying to a standing position.


Q: Are there any known serious, but rare, side effects associated with Olfrex?

A: Official product information describes rare but serious side effects. These include Neuroleptic Malignant Syndrome (NMS), Serotonin Syndrome, and a condition affecting movement called Tardive Dyskinesia (TD).


Q: What information is available about Olfrex and potential effects on blood pressure?

A: Regulatory warnings state that Olfrex can cause orthostatic hypotension. This is a sudden drop in blood pressure that happens when moving to a standing position, which can lead to dizziness or falls.


Q: Does Olfrex interact with common over-the-counter pain relievers?

A: According to official interaction data, using Olfrex with certain pain relievers like NSAIDs (Non-Steroidal Anti-Inflammatory Drugs) and aspirin may increase the risk of bleeding.


Q: Can a person safely use herbal supplements while taking Olfrex?

A: Regulatory information specifically warns against the use of the herbal supplement St. John’s Wort while using Olfrex. Using this combination may increase the risk for a serious condition called Serotonin Syndrome.


Q: Are there any dietary restrictions mentioned for people using Olfrex?

A: Official documents do not list specific restrictions regarding food when taking the oral formulation. However, regulatory documents note that combining Olfrex with alcohol may enhance the sedative effects and increase the risk of low blood pressure.


Q: What happens in the body when a person stops taking Olfrex suddenly?

A: Regulatory guidance states that abruptly stopping Olfrex should be avoided. Discontinuation can lead to withdrawal symptoms such as dizziness, nausea, irritability, or abnormal dreams. Official guidance indicates that the dose should be gradually tapered to minimize risk.


Q: How quickly is Olfrex expected to start showing noticeable effects?

A: Clinical studies indicate that some improvement in mood may be noticed within the first week of treatment. However, official information suggests the full therapeutic benefit of the medication may require several weeks of consistent use.


Q: What is the typical duration of effect after a single dose of Olfrex?

A: The medicine’s components have varying half-lives. Because one component has a mean half-life of 4 to 6 days, it may take several weeks for the active ingredients to be almost completely cleared from the body after the last dose.


Q: Is Olfrex meant for short-term use, or is it intended to be taken long-term?

A: Official clinical information indicates the medicine is approved for the treatment of acute depressive episodes. It has also been studied and used in clinical trials for long-term maintenance treatment of Bipolar I Disorder.


Q: Is Olfrex appropriate for use in children or adolescents?

A: Regulatory information states that Olfrex is approved for treating depressive episodes associated with Bipolar I Disorder in pediatric patients who are 10 years of age and older.


Q: Are there specific warnings or considerations for elderly patients using Olfrex?

A: Warnings exist for elderly patients, particularly those with dementia-related psychosis, who have shown an increased risk of death and cerebrovascular events. Official guidelines may recommend a lower starting dose for some elderly patients.


Q: Does having a history of kidney or liver problems affect eligibility for Olfrex?

A: Patients with hepatic (liver) impairment may require a lower or less frequent dose of Olfrex. This adjustment is advised because liver problems can slow the removal of one of the active components (fluoxetine) from the body.


Q: What information is available about using Olfrex during pregnancy or while breastfeeding?

A: Pregnancy: Exposure during the third trimester carries a risk of withdrawal symptoms in the newborn baby. Breastfeeding: Both active ingredients pass into breast milk; infants should be monitored for potential side effects, such as drowsiness.


Q: Is Olfrex generally considered a controlled substance?

A: Olfrex is officially not classified as a federally controlled substance in the United States.


Q: Does Olfrex have any potential for misuse or dependence?

A: Official documents state that the medicine has not been systematically studied for misuse potential or dependence. Healthcare professionals are advised to carefully evaluate patients who have a history of drug abuse.


Q: What are the official recommendations for storing Olfrex?

A: Olfrex should be stored at controlled room temperature, typically between 15 C and 30 C (59 F and 86 F). It is recommended that the medication be kept away from high heat and excess moisture to maintain its stability.


Q: Is a different dose of Olfrex recommended for people with mild organ impairment?

A: Official dosing guidelines recommend a lower dose of Olfrex for patients who have hepatic (liver) impairment. This is to account for potential changes in how the body processes the medication.


Q: Is it common to experience changes in appetite or weight when starting Olfrex?

A: Yes, clinical trials indicate that weight gain and an increase in appetite are commonly reported side effects when starting Olfrex.


Q: Why do people sometimes refer to Olfrex as a '[General drug class] medication'?

A: Regulatory documents classify Olfrex as a combination product containing an Atypical Antipsychotic and a Selective Serotonin Reuptake Inhibitor (SSRI). This dual classification describes the function of its two active components.


Q: What official safety warnings or classifications does Olfrex carry?

A: Olfrex carries a Boxed Warning, which is the most serious warning required by the FDA. This warning concerns the increased risk of suicidal thoughts and behaviors in children, adolescents, and young adults.


Q: Is Olfrex known to cause changes in mood, such as increased anxiety or depression?

A: Official warnings indicate that Olfrex may activate mania or hypomania in patients with Bipolar Disorder. Patients should be monitored for clinical worsening, which includes unusual changes in behavior or the emergence of suicidal thoughts.


Q: Is a generic version of Olfrex currently available?

A: Yes, official product information confirms that a generic version of the olanzapine and fluoxetine combination product is currently available.


Q: How long after stopping Olfrex does the drug typically clear from the body?

A: One of the active components has a long half-life, meaning it takes a prolonged period to leave the body. Because of this, it may take several weeks for Olfrex to be almost completely cleared from the system after the last dose.


Q: Are specific lab tests or routine monitoring required before or during use of Olfrex?

A: Regulatory guidelines require specific routine monitoring before and during treatment with Olfrex. This monitoring includes periodic fasting blood glucose testing, fasting blood lipid testing, and regular monitoring of weight.


Q: Does Olfrex cause blurry vision or other temporary eye-related side effects?

A: According to official adverse event reports, blurred vision is listed as a common side effect of Olfrex.


Q: What are the known risk factors for experiencing side effects from Olfrex?

A: Official warnings describe certain patient populations who may be at higher risk for side effects. These include elderly patients with dementia and individuals with pre-existing conditions like diabetes, hyperlipidemia (high fat levels in the blood), or conditions that lower the seizure threshold.


Q: What conditions make the use of Olfrex contraindicated?

A: Official product information lists specific contraindications, meaning conditions or co-administered medicines where Olfrex must not be used. It is contraindicated with MAOIs (Monoamine Oxidase Inhibitors), Pimozide, and Thioridazine.


Q: How does Olfrex affect a person's ability to drive or operate machinery?

A: Regulatory warnings state that Olfrex may impair judgment, thinking, and motor skills. Caution is advised when engaging in activities such as driving or operating complex machinery.


Q: Why might certain pre-existing medical conditions prevent a person from using Olfrex?

A: Pre-existing medical conditions that require caution before using Olfrex include Hyperglycemia (high blood sugar), Diabetes, Hyperlipidemia (high fat levels in the blood), and conditions that predispose to QT prolongation (a heart rhythm issue).


Q: What is the main chemical class of the active ingredient in Olfrex?

A: Olfrex is a combination product officially classified as an Atypical Antipsychotic and a Selective Serotonin Reuptake Inhibitor (SSRI).


Q: Is it normal to feel no immediate effect after taking the first dose of Olfrex?

A: While some therapeutic effects may begin during the first week, the full therapeutic benefit often requires several weeks of consistent use. Official information indicates that patients may not feel the full effect of the medicine immediately.


Q: What is the difference between an 'interaction' and a 'contraindication' for Olfrex?

A: A contraindication is an absolute prohibition; it means the medicine must not be used under specific circumstances or with certain drugs (like MAOIs). An interaction is a circumstance where the effects of Olfrex or the co-administered drug are altered, often requiring caution or monitoring.


Q: What happens if Olfrex is exposed to high temperatures?

A: Official storage recommendations state that Olfrex should be stored at controlled room temperature. It is recommended that the medication be kept away from high temperatures and heat to maintain its stability and effectiveness.

How should Olfrex be stored and disposed of?

How to Store and Dispose of Olfrex?

The storage and disposal requirements for Olfrex (olanzapine) are defined by official regulatory labeling to maintain product stability and safety.

Storage Requirements

Olfrex must be stored at Controlled Room Temperature, which is 20 C to 25 C (68 F to 77 F), with permitted excursions up to 30 C. The medicine must be kept in its original container and protected from both light and moisture. A critical requirement is to keep Olfrex out of the reach and sight of children.

For the orodispersible tablet form, the tablet should not be removed from its protective foil pouch until immediately before use, and must be used within one hour of opening.

Disposal Instructions

Unused or expired Olfrex should be disposed of by following official guidelines, preferably through a community drug take-back program. If a program is unavailable, regulators advise mixing the tablets with an undesirable substance, sealing them in a bag, and discarding them in the household trash. The medication should not be flushed down a toilet or poured down a drain.

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

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