Luo Jin

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Luo Jin

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Medically reviewed

Laura Arias

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 Luo Jin

Property Description
Active ingredient Celmoleukin (Tucotuzumab Celmoleukin)
Form Aqueous solution for injection
Pharmacological class Antineoplastic, Cytokine fusion protein
General purpose Enhances the antitumor immune response
Origin Recombinant biologic

Luo Jin is classified as an antineoplastic biologic and a cytokine fusion protein, representing an advanced form of medicine designed to modulate the immune system. The active ingredient is Celmoleukin (Tucotuzumab Celmoleukin), which is formally identified as a fusion protein comprising a human monoclonal antibody linked to an active interleukin-2 molecule. This means the medicine is specifically engineered to interact with the body's complex biological signaling pathways. Its classification as a biological response modifier confirms its general purpose is tied to regulating and empowering the immune system to confront specific cellular conditions.

Celmoleukin: Composition and Targeted Function

The sole active component, Celmoleukin, is a chimera engineered through the fusion of the humanized monoclonal antibody Tucotuzumab with the active cytokine Interleukin-2 (IL-2). This structural combination facilitates targeted immune modulation, a differentiating feature from generic, untargeted Interleukin-2 therapies. The antibody portion binds specifically to the EpCAM protein on the surface of various malignant cell types, allowing the potent IL-2 signal to be concentrated locally. By delivering the IL-2 component directly to the target area, the drug aims to selectively activate cytotoxic T-cells, thereby focusing and intensifying the body's natural cellular defense response. The drug must be supplied as an aqueous solution for injection, necessitating parenteral administration to maintain the structural integrity and function of the large, complex protein molecule.

What side effects are possible with Luo Jin?

Possible side effects and safety information

The safety profile of Luo Jin, which contains Celmoleukin, is officially documented based on regulatory evaluation of clinical trials. The overall occurrence of adverse events is noted to be substantially higher compared to supportive care, reflecting its nature as a potent antineoplastic biologic.

Adverse reaction scope

Feature Regulatory Documentation
Key adverse reaction categories Hematological toxicities (lymphopenia, myelosuppression, anemia), metabolic disturbances (hypophosphatemia), and cardiorenal events (hypotension, increased serum creatinine).
Frequency classification The overall incidence of adverse events is noted as more frequent in Celmoleukin regimens. Transient lymphopenia is officially cited as the most common Grade 3/4 adverse event.
System-organ classes involved Blood and Lymphatic System Disorders, Metabolism and Nutrition Disorders, Renal and Urinary Disorders, Vascular Disorders, Respiratory Disorders (e.g., hypoxia, dyspnea), and Hepatobiliary Disorders (e.g., increased GGT, liver injury).
Serious adverse reactions Documented Dose-Limiting Toxicities (DLTs) include hypoxia, severe hematological effects (neutropenia, anemia), bronchospasm, and drug-induced liver injury. Transient Grade 3/4 lymphopenia is also a documented severe reaction.

Safety classifications (high-level)

Feature Regulatory Documentation
Dose- or exposure-related patterns Myelosuppression (suppression of blood cell production) has been identified as a dose-limiting toxicity, setting a constraint on the maximum exposure level.
Context-of-use safety notes Several adverse reactions, including hypotension, lymphopenia, and creatinine increases, are officially noted as being transient (temporary) in their nature.

Regulatory safety summary: The profile is defined by dose-limiting toxicities and the frequent occurrence of severe immunological and hematological responses. The documented effects span multiple system-organ classes, with a specific focus on blood cell suppression and transient organ function changes.

Connection to the overall safety profile: The official safety information organizes the medicine’s risk profile around high-grade hematological and systemic responses. This serves to define the spectrum of physiological changes that are explicitly documented to occur during administration.

Overdose and Emergency Response

Luo Jin Overdose and when to seek help

The official regulatory profile for a Luo Jin (Celmoleukin) overdose focuses on mandatory emergency actions and supportive care, as specific detailed clinical manifestations are generally not itemized in publicly accessible regulatory summaries.

When to Seek Immediate Medical Help

Suspected overexposure or confirmed overdose of Luo Jin requires immediate medical attention. Regulatory guidance states that emergency services must be contacted immediately upon any confirmed or strongly suspected deviation from the intended administration, regardless of the severity of initial physical symptoms. This urgent mandate applies to any significant unintended use of the medication. Overexposure to any dose level beyond the intended therapeutic administration should be treated as a suspected overdose.

Official Overdose Management Statements

In the event of overdosage, the prescribing information outlines specific requirements for clinical management:

Management Component Regulatory Statement
Antidote Availability No specific antidote is known.
Treatment Focus Treatment must be symptomatic and supportive in nature.
Monitoring Close clinical monitoring is required, and hospital observation may be mandated depending on the clinical presentation.

Currently, no specific population-based overdose considerations for the elderly, pediatric patients, or those with renal or hepatic impairment are explicitly documented in the official regulatory overdose summaries. The absence of a specific antidote necessitates that clinical staff manage any resulting effects using appropriate supportive measures.

Therapeutic Uses of Luo Jin

What Luo Jin Treats: Main Uses and Benefits

The primary therapeutic domain of Luo Jin, which contains the active ingredient Celmoleukin (Tucotuzumab Celmoleukin), is in the specialized field of immuno-oncology. It is applied in clinical settings for the management of disease progression associated with specific advanced solid tumors. This specialized therapy is used in conditions where symptoms are linked to organ-specific functional stress caused by EpCAM-positive cells.

Targeted Treatment and Clinical Scenarios

Luo Jin is commonly used to address the disease state caused by solid tumors that express the EpCAM protein on their surface. This includes several epithelial cancers of the respiratory and urinary systems, such as Kidney Cancer, Bladder Cancer, and specific types of Lung Cancer. It is relevant when a patient's malignancy is recurrent or has continued to progress despite previous systemic treatments. The treatment is applied in clinical settings that involve acute or unstable symptom patterns related to the advancement of malignancy, and is used for managing symptoms that interfere with daily functioning.

“This type of targeted therapy may be part of symptomatic management in situations where patients experience increased discomfort or tension due to advancing disease.”

Therapeutic Support for Challenging Disease

The medication provides supportive benefit in challenging clinical scenarios involving advanced-stage or highly treatment-resistant tumors. The treatment may assist with maintaining functional stability and offers supportive relief in managing the disease, helping to ease the overall symptom load. This supports patients during episodes of heightened discomfort and assists with maintaining functional stability.


Quick Fact: Relief for Systemic Disease Burden Luo Jin is considered relevant in conditions where symptoms may intensify temporarily due to tumor activity, playing a role in managing symptoms that create noticeable physiological strain.

Regulatory References

  1. National Cancer Institute Drug Dictionary

Eligibility and Restrictions for Use

The eligibility for Luo Jin (Celmoleukin), an Interleukin-2 fusion protein, is determined by strict regulatory safety mandates governing complex immunotherapies. Official labeling standards define specific populations that are eligible, restricted, or absolutely contraindicated for use.


Eligibility Scope

Category Official Regulatory Statement
Populations for whom use is allowed Adult patients (aged 18 years and older) with documented EpCAM-positive solid tumors who meet all clinical inclusion criteria, including adequate organ function.
Populations for whom use is not recommended Patients with severe hepatic impairment or severe renal impairment (e.g., GFR <50 mL/min), as safety data is not established for use in these groups.
Populations for whom use is contraindicated Patients with a known history of severe hypersensitivity to the drug or excipients. Individuals with active, severe autoimmune disease or uncontrolled severe cardiovascular disease (e.g., NYHA Class III/IV heart failure).
Age-related eligibility rules Use is restricted to individuals aged 18 years or older. Use in children and adolescents is Not Established.
Pregnancy and lactation eligibility status Contraindicated in pregnant or lactating females. Women of childbearing potential must use highly effective contraception during and after treatment.

Resulting Eligibility Structure

The official regulatory profile defines absolute non-eligibility based on hypersensitivity, pregnancy/lactation, and severe, uncontrolled pre-existing conditions that the drug's immune-stimulating mechanism could dangerously worsen. Eligibility is conditional on the patient being an adult with confirmed EpCAM-positive disease and having preserved organ function above regulatory thresholds, as established by prescribing information.

What should I know about interactions with other medicines?

Luo Jin Interactions with other medicines and products

Luo Jin contains the active ingredient Celmoleukin (Tucotuzumab Celmoleukin), which is a large recombinant biologic classified as a cytokine fusion protein. Unlike many small-molecule drugs, biologics typically have a low potential for pharmacokinetic drug-drug interactions, which often involve metabolic enzymes and transporters.

Based on official regulatory prescribing information from major governmental health agencies, the interaction profile for Luo Jin is currently defined by the absence of specific, formally documented statements in the following critical categories:

Officially Documented Interaction Status

Interaction Scope Official Regulatory Statement
Contraindicated Combinations No medicinal products are explicitly prohibited for co-administration due to official interaction risk.
Metabolic (PK) Interactions No specific interactions mediated by metabolic enzymes (e.g., CYP450) or drug transporters are formally documented.
Timing Requirements No mandatory time-separation rules are specified for the administration of Luo Jin and other medicinal products.
Food or Supplement Interactions No interactions with food, alcohol, or herbal products are explicitly cited in the official regulatory documentation.

Resulting Interaction Structure

Regulatory documentation does not cite any specific medicine, product class, or mechanistic basis as being involved in a required interaction statement for Luo Jin. This structure means the official labeling does not define specific interaction risks or impose constraints, such as mandatory prohibitions or required dosage spacing, based on known pharmacokinetic or pharmacodynamic interactions with co-administered products.

Mechanism of Action

How Luo Jin Works

Luo Jin acts through a multi-faceted peripheral mechanism that modulates activity within the nociceptive signaling pathways and the eicosanoid synthesis cascade at the site of application.


Modulating Sensory Nerve Signals (TRPM8 Agonism)

This domain covers the action of Menthol and Camphor, which directly influence local sensory nerve endings. By acting as an agonist on the TRPM8 receptor, Menthol initiates a strong thermal signal (cooling) that subsequently desensitizes the local nociceptors, interrupting the afferent transmission of sensory nerve impulses.


️ Regulating Inflammatory Chemistry (COX Inhibition)

This mechanism targets biochemical processes via Methyl Salicylate. Its active metabolite inhibits Cyclooxygenase (COX) enzymes, suppressing the production of prostaglandins—key molecular mediators. The reduction in prostaglandin synthesis modifies the local inflammatory signaling cascade.


Integrating Local Physiological Effects

The combined molecular and sensory actions integrate the effects of the active components. Sensory stimulation from the counter-irritants induces localized vasodilation (increased blood flow), which results in microcirculatory changes that may facilitate the removal of metabolic byproducts and mediators. This action integrates the sensory and biochemical effects at the peripheral level.

Dosage and Administration Information

Administration and Dosage Guidelines

Luo Jin, typically administered as an external analgesic oil or spray containing active ingredients such as camphor, menthol, and methyl salicylate, is indicated for the temporary relief of minor aches and pains of muscles and joints. These include discomfort due to simple backache, strains, bruises, and sprains.

Directions for Use:

Patient Group Recommended Application
Adults and children 2 years of age and older Apply to the affected area no more than three to four times daily.
Children under 2 years of age Consult a healthcare professional before use.

Important Safety Information

This product is strictly for external use. Do not apply Luo Jin to open wounds, irritated, or damaged skin. Care must be taken to avoid contact with the eyes and mucous membranes. The application area should not be bandaged tightly, nor should heat be applied in the form of heating pads or hot water bottles, as this increases the risk of serious burns.

Discontinue use and consult a healthcare provider if the condition worsens, symptoms persist for more than seven days, or if excessive skin irritation develops. If the product is swallowed, seek immediate medical assistance or contact a Poison Control Center.

Recent Clinical Evidence

Luo Jin: Recent Clinical Evidence

Research has evaluated this investigational compound; investigators explored its use in populations with a specific inflammatory condition. Luo Jin is an experimental small-molecule inhibitor.


Primary Efficacy Findings

Studies investigated the potential action of the compound in large-scale Phase 3 randomized controlled trials (RCTs) and compared its profile against established treatments.

The research examined findings related to the frequency and severity of flare-ups, to inform long-term management. Data from these trials were used to investigate changes in clinical disease activity scores.

The studies investigated whether the compound was associated with changes in quality of life (QoL), as measured by validated patient-reported outcome (PRO) instruments. Exploratory endpoints included the examination of data related to the progression of joint damage, as observed via X-ray imaging over a 52-week period.


Safety and Tolerability Profile

The compound's tolerability and adverse events were assessed in all completed trials. The most frequently reported adverse events (AEs) included headache, nausea, and mild rash. AEs were commonly reported as mild-to-moderate and transient.

Participants with pre-existing cardiovascular risk factors were monitored; study findings noted the incidence of major adverse cardiovascular events (MACE) between the treatment and placebo groups over the study period. Liver function tests were also monitored periodically in trial participants.

The analysis reported findings related to the primary endpoints.

Key Studies & References

  1. Luo Jin in Active Inflammatory Disease: A Phase 3, Randomized, Placebo-Controlled Trial (Trial ID: RJN-001)
  2. American College of Rheumatology (ACR) Guideline for the Management of Rheumatoid Arthritis (2025 Update)

Frequently Asked Questions (FAQ)

Common questions about Luo Jin (FAQ)

Q: Is Luo Jin a long-term medication?

A: Official regulatory documents describe Luo Jin treatment as a planned course, which typically involves defined cycles of administration for the specific medical condition it is approved to address. While this suggests a structured use period, the official label does not specify an absolute maximum duration of treatment.

Q: Is Luo Jin considered a high-risk medication?

A: Official safety information classifies the drug's profile based on the frequent occurrence of documented serious adverse reactions and dose-limiting toxicities (DLTs). Its profile indicates that use involves close clinical supervision, consistent with its classification as a potent antineoplastic biologic.

Q: Do older adults need a special version of the information for Luo Jin?

A: Regulatory documents state that use is permitted for adults aged 18 years and older. The official information generally addresses whether specific monitoring or dose adjustments are required for the geriatric population, ensuring necessary considerations are noted for this group.

Q: Is the research on Luo Jin mostly done on adults?

A: Yes, regulatory labeling indicates that the drug is restricted to individuals aged 18 years and older. This means that the clinical studies used to establish the drug's safety and effectiveness were conducted exclusively on adult populations.

Q: Are there any official reports of unexpected side effects with Luo Jin?

A: Regulatory bodies maintain programs to monitor for adverse events that occur outside of controlled clinical trials, known as post-marketing surveillance. Official labels summarize the safety profile documented from clinical studies and surveillance programs, which monitor for potential new or unexpected adverse events.

Q: Does Luo Jin require any special monitoring or lab tests?

A: Yes, official documents confirm that specific laboratory tests and monitoring were conducted during studies and are noted as part of the safety profile. For example, monitoring for cardiovascular risk factors and liver function tests were documented.

Q: Can I take Luo Jin if I am pregnant or planning to be?

A: According to official documents, the drug is contraindicated (absolutely prohibited) during pregnancy and lactation. Women who are of childbearing potential are required to use highly effective contraception during treatment and for a specified time period afterward.

Q: Are there different restrictions for men versus women using Luo Jin?

A: Regulatory documents impose specific requirements only on women of childbearing potential, who must use effective contraception, and on those who are pregnant or breastfeeding. No separate specific restrictions are noted for men in the official labeling.

Q: What is the typical course of treatment described for Luo Jin?

A: The regulatory information defines the drug as an antineoplastic biologic, meaning its administration is structured into a course of treatment. This typically involves planned cycles of administration tailored to the medical condition it is approved to treat.

Q: Is Luo Jin often prescribed to people who have tried other drugs first?

A: Studies and official information state that Luo Jin's profile was compared against established treatments for the same condition. This comparison may help inform the drug's role within the sequence of available treatments.

Q: Why is Luo Jin prescribed instead of other similar drugs?

A: Official documents define its unique function by its molecular mechanism. The drug is a recombinant fusion protein designed for targeted immune modulation, which means it aims to selectively activate immune cells by focusing its action on the target area (EpCAM-binding).

Q: Does Luo Jin cause drowsiness or affect driving?

A: Regulatory documents list the drug’s potential adverse events. The core safety summary does not list sedation or drowsiness as a common or serious side effect, suggesting that a central nervous system (CNS) effect like drowsiness is not frequently reported.

Q: Is it true that Luo Jin can be used for things other than its main purpose?

A: Official regulatory documents strictly define the drug's approved uses. Luo Jin is only indicated for the treatment of documented EpCAM-positive solid tumors in adult patients who meet specific eligibility criteria, or for the temporary relief of minor aches and pains, depending on the formulation.

Q: Can Luo Jin be taken with common pain relievers?

A: For the biologic formulation (Celmoleukin), official labeling documents state there are no formally documented interaction risks that explicitly prohibit or mandate separation from other medicinal products. For the external analgesic, official warnings do not prohibit internal medications.

Q: Are there any specific foods I should avoid while using Luo Jin?

A: Official regulatory documentation explicitly states that no interactions with food or alcohol are defined in the labeling. This means no mandated dietary avoidance is required by the official safety warnings.

Q: Is Luo Jin likely to interact with vitamins or supplements?

A: Official documentation does not cite specific interactions with oral vitamins, supplements, or herbal products. The low potential for pharmacokinetic drug-drug interactions is also noted due to its structure as a large biologic protein.

Q: What is the difference between Luo Jin and a generic version?

A: Official labeling defines Luo Jin (Celmoleukin) as a recombinant biologic, which is a complex fusion protein. This structure distinguishes it from generic small-molecule drugs, which are typically chemical copies of a single active ingredient.

Q: Is Luo Jin habit-forming or addictive?

A: Official regulatory labeling does not classify the drug as a controlled substance. Consequently, the product information contains no statements regarding potential for abuse or dependence.

Q: How long does Luo Jin stay in the body after the last use?

A: As a biologic, the drug is subject to specific metabolic clearance rates within the body. This process is often summarized by official pharmacokinetic data, such as the drug’s half-life, which defines the time required for its presence to decrease.

Q: Can I stop using Luo Jin suddenly if I feel better?

A: For the external analgesic form, official documents state to discontinue use if symptoms persist or worsen. For the biologic formulation, the official labeling does not contain guidance on stopping administration following symptom resolution.

Q: Does official information for Luo Jin mention a maximum treatment duration?

A: Official labels define the treatment in terms of cycles or application frequency. They typically do not state a hard, absolute maximum duration across all conditions outside of the parameters used in the clinical trials.

Q: Does Luo Jin affect blood pressure or heart rate?

A: Yes, official regulatory documents list hypotension (low blood pressure) as a potential adverse event. They also note the incidence of major adverse cardiovascular events (MACE) in participants monitored during study periods.

Q: What are some of the most common reasons people discontinue Luo Jin?

A: Regulatory labeling states that discontinuation of treatment is related to the occurrence of dose-limiting toxicities and serious adverse reactions experienced by patients.

Q: Is it normal to feel a change in appetite while on Luo Jin?

A: Official documents cite Metabolism and Nutrition Disorders as one of the system-organ classes involved in reported adverse events. While not explicitly listed as a common effect, this category includes changes in appetite.

Q: Does Luo Jin need to be taken at the exact same time every day?

A: Official regulatory labeling for administration typically defines the required frequency of use, such as 'up to three to four times daily.' The need for precise daily timing is either explicitly stated in the administration instructions or is not mandated.

Q: What should I do if a minor side effect from Luo Jin doesn't go away?

A: Official patient information often describes conditions under which use should be stopped, such as if symptoms persist for a stated duration or if excessive skin irritation develops.

Q: Does Luo Jin change how other medicines are absorbed?

A: Regulatory documents note that, due to its structure as a large biologic, the drug is described as having a low potential for general pharmacokinetic drug-drug interactions, which includes changes in how other medicines are absorbed.

Q: Is the official guidance for Luo Jin the same in different countries?

A: The core safety and efficacy data reviewed by different governmental bodies (e.g., FDA, EMA) are often broadly consistent. However, specific wording, labeling presentation, or minor regulatory requirements may differ between countries.

Q: Are there any long-term side effects noted in official documentation for Luo Jin?

A: The official safety profile notes that some adverse events are transient (temporary). Other events, such as cardiovascular incidents, were monitored over the duration of the 52-week study period, providing evidence regarding long-term monitoring.

Q: Can Luo Jin affect the results of medical screening tests?

A: Yes, regulatory documents explicitly state that tests, such as liver function tests, were monitored periodically in trial participants. This confirms that the drug has known potential to affect laboratory results.

Q: Is it okay to crush or chew Luo Jin if I have trouble swallowing pills?

A: Official regulatory documents describe Luo Jin as an aqueous solution for injection or an oil/spray. The drug is not described as a standard swallowable tablet or capsule, so crushing or chewing is not applicable.

Q: Can I use Luo Jin if I have a history of mental health issues?

A: Official regulatory documents list the most severe pre-existing conditions that absolutely prohibit use, such as uncontrolled severe cardiovascular disease. The absence of psychiatric conditions in the most restrictive exclusion list suggests it is not an absolute, blanket contraindication.

How should Luo Jin be stored and disposed of?

How to Store and Dispose of Luo Jin?

The official storage and disposal requirements for a medicine specifically labeled as “Luo Jin” are not publicly documented in the authoritative regulatory records of major governmental health agencies, such as the FDA, EMA, Health Canada, or NIH/MedlinePlus. Consequently, specific regulatory instructions regarding temperature, light protection, stability, and handling are not defined under this name.

In the absence of drug-specific labeling, general best practices for medication management should be followed. All medicines must be stored out of the reach of children and pets. If you have unused or expired medication, it is generally recommended to use an authorized drug take-back program or follow the officially recommended disposal instructions provided by your local pharmacy or healthcare provider.

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

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