Febrex Plus Syrup

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Febrex Plus Syrup

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Medically reviewed

Marina Burgos

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 Febrex Plus Syrup

Quick Facts: Febrex Plus Syrup Identity

Property Description
Active Ingredients Paracetamol, Chlorphenamine Maleate, Phenylephrine HCl
Form Syrup (Oral Liquid Dosage Form)
Pharmacological Class Multi-ingredient Cold Remedy (FDC)
General Purpose Symptomatic relief of cold and flu discomforts
Origin Synthetic, chemically derived compounds

What Type of Medicine is Febrex Plus Syrup?

Febrex Plus Syrup is defined as a fixed-dose combination (FDC) preparation, which is a medicine integrating three distinct active chemical substances in a single dosage unit. It is classified as an oral liquid dosage form and typically functions as an over-the-counter (OTC) multi-ingredient cold remedy. The formulation is intended for its ability to target concurrent symptoms of respiratory illness, combining the actions of an H₁-receptor antagonist (antihistamine), an analgesic-antipyretic agent, and an α-adrenergic agonist (decongestant).

Composition: Active Ingredients and Product Differentiation

The composition relies on the precise quantity of three core synthetic, chemically derived compounds in an aqueous syrup base. The active ingredients [INN] are Paracetamol (Acetaminophen), Chlorphenamine Maleate (Chlorpheniramine), and Phenylephrine Hydrochloride. This combination often targets the pediatric population, utilizing the palatable syrup form for easier oral administration compared to solid tablets. Combination products containing an antihistamine and a decongestant are used to provide short-term relief for the common cold.

General Purpose: What Discomforts Does Febrex Plus Syrup Address?

The primary purpose of Febrex Plus Syrup is to offer simultaneous and comprehensive symptomatic relief for the concurrent physical manifestations associated with the typical course of the common cold and flu-like symptoms. The preparation is specifically designed to manage a cluster of issues, including elevated temperature and general body aches, while simultaneously controlling the allergic response that leads to a runny nose or sneezing and mitigating the mucosal swelling that causes nasal congestion. A typical use scenario involves administering the syrup to relieve the combined discomfort of a feverish, congested state.

What side effects are possible with Febrex Plus Syrup?

Official Safety Profile and Adverse Reactions

The safety profile for this fixed-dose combination, which contains Paracetamol, Chlorphenamine Maleate, and Phenylephrine HCl, is derived from the adverse reactions documented for its individual components in official regulatory labeling.

Frequency and System Classification

Adverse reactions are officially categorized by frequency and the body system affected. Common reactions primarily involve the Nervous System (e.g., drowsiness, sedation, headache, dizziness) and Gastrointestinal Disorders (e.g., dry mouth, nausea). These CNS effects are often noted as being more likely to appear early in treatment.

Less frequent, uncommon or rare effects are documented across other systems, including Cardiovascular Disorders (such as blood pressure elevation or palpitations) and Renal and Urinary Disorders (such as urinary retention).

Serious Adverse Reactions and Safety Constraints

Official labeling specifies several serious safety considerations:

  • Acute Hepatic Failure is a critical, dose-related risk associated with Paracetamol, leading to a mandatory contraindication in individuals with severe hepatic impairment.
  • Severe Cutaneous Adverse Reactions (SCARs), including Stevens-Johnson Syndrome and Toxic Epidermal Necrolysis, are documented as rare but serious effects.
  • The drug is contraindicated in patients with severe hypertension, severe coronary artery disease, or those concurrently using or having recently used Monoamine Oxidase Inhibitors (MAOIs), due to the serious risk of hypertensive crisis from the Phenylephrine component.

Population-Specific Notes

Regulatory documents highlight that older adults have an increased risk of adverse effects, particularly CNS effects and urinary retention. Furthermore, the risk of paradoxical excitation (restlessness instead of sedation) is noted for the Chlorphenamine component in pediatric patients.

Overdose and Emergency Response

Febrex Plus Syrup Overdose and When to Seek Help

Overdose involving this multi-ingredient syrup (Paracetamol, Chlorphenamine Maleate, Phenylephrine HCl) requires immediate medical attention due to documented, potentially life-threatening risks associated with its components.

Documented Manifestations

Initial overdose symptoms may include nausea, vomiting, pallor, and abdominal pain. Due to the Chlorphenamine component, both Central Nervous System (CNS) depression (e.g., sedation or coma) and paradoxical CNS excitation (e.g., agitation, hyperpyrexia) are officially documented, with excitation being more common in children. The Phenylephrine component carries the risk of hypertensive episodes and associated cardiac arrhythmias. Severe outcomes listed in regulatory documents include hepatic failure, seizures, and cardio-respiratory collapse.

Regulator-Mandated Emergency Action

It is required to seek immediate medical attention or advice in the event of any suspected overdose, even if the patient feels well. This mandatory action is necessary because severe liver damage from Paracetamol may be delayed and irreversible without prompt treatment. Immediate hospitalization is required for evaluation. Specific procedural steps are necessary, including the required administration of the antidote N-acetylcysteine and general symptomatic and supportive treatment. The overdose hazard is formally noted as being greater in patients with existing hepatic impairment.

Therapeutic Uses of Febrex Plus Syrup

What Febrex Plus Syrup Treats: Main Uses and Benefits

Febrex Plus Syrup is indicated for the temporary management of symptoms associated with the common cold and flu. This formulation is intended to provide relief from various signs and may assist in the temporary reduction of discomfort during a symptomatic period. In clinical use, the product is commonly employed for the temporary addressing of symptoms such as fever, minor pain, and nasal congestion. This multi-symptom approach aims to provide relief for a variety of common cold-related complaints. The official indications include the temporary symptomatic relief of complaints associated with the common cold, such as headache, body ache, runny nose, and sore throat pain.


Medicines used for cold and flu symptoms are generally intended to provide comfort while the body addresses the infection.

Quick Fact: Relief for Fever and Nasal Congestion


Would you like to know more about the different types of ingredients that contribute to symptomatic relief in cold medications?

Eligibility and Restrictions for Use

Who can and cannot use Febrex Plus Syrup?

The official regulatory guidelines strictly define the eligible population for Febrex Plus Syrup (Paracetamol, Chlorphenamine Maleate, and Phenylephrine HCl) based on age, pre-existing conditions, and physiological status.

Absolute Contraindications (Must Not Use)

The medicine is officially contraindicated for several population groups, meaning use is strictly prohibited. This includes children under the age of 2 years. Use is also contraindicated in patients with known hypersensitivity to any of the active ingredients and in those currently or recently (within 14 days) receiving Monoamine Oxidase Inhibitors (MAOIs).

Comorbidity and Physiological Restrictions

Contraindications related to pre-existing conditions include severe hypertension, most forms of severe coronary artery disease, severe liver disease, phaeochromocytoma, and closed-angle glaucoma. Furthermore, the syrup is officially contraindicated during lactation (breastfeeding) and not recommended during pregnancy.

Conditional Use

Certain patient populations require special caution, defined as conditional use. This includes the elderly population and patients with conditions such as diabetes mellitus, hyperthyroidism, asthma, and severe renal impairment.

What should I know about interactions with other medicines?

The regulatory documentation for Febrex Plus Syrup, which contains Paracetamol, Chlorphenamine Maleate, and Phenylephrine HCl, formally outlines several crucial interaction patterns.

Interaction Category Officially Documented Constraint
Contraindicated Combinations Monoamine Oxidase Inhibitors (MAOIs) are formally contraindicated; the product must not be used within 14 days of stopping MAOI therapy. Co-administration with other Paracetamol-containing products and other Sympathomimetic amines is also strictly prohibited to prevent overdose or additive cardiovascular effects.
Pharmacodynamic Risk Co-use with Central Nervous System (CNS) Depressants, including alcohol, is documented to result in additive sedative effects. Phenylephrine may reduce the efficacy of Antihypertensives and Beta-Blockers, and its combination with Cardiac Glycosides may increase the risk of irregular heartbeat.
Exposure Modification Prolonged, regular use of Paracetamol is documented to enhance the anticoagulant effect of Warfarin and other Coumarins. The absorption rate of Paracetamol is officially noted to be increased by Metoclopramide or Domperidone and reduced by Cholestyramine.

The interaction profile emphasizes that concomitant use with alcohol may increase the hepatotoxicity risk associated with Paracetamol, an effect which is also noted for certain Hepatic Enzyme-Inducing Drugs. Furthermore, regulatory notes indicate that the elderly population has an increased susceptibility to CNS-related interaction effects, and caution is noted for patients with hepatic impairment due to increased interaction-related risks.

Mechanism of Action

Febrex Plus Syrup exerts its action via three distinct pharmacodynamic mechanisms on different biological targets.

Chlorpheniramine maleate functions as a competitive antagonist at peripheral Histamine H1-receptors. Its binding blocks the activity of endogenous histamine on effector cells located in the respiratory tract and vasculature, inhibiting downstream signaling cascades that govern vascular permeability and glandular secretion.

Phenylephrine hydrochloride acts as a direct-acting agonist at postsynaptic alpha1-adrenergic receptors, predominantly within the arterioles of the nasal mucosa. This binding initiates an intracellular cascade leading to the activation of phospholipase C and increased intracellular calcium, resulting in localized vasoconstriction. The systemic physiological consequence is a reduction in blood flow to the targeted vascular beds, modulating capillary hydrostatic pressure.

Paracetamol (acetaminophen) acts primarily in the central nervous system (CNS) by modulating the synthesis of chemical mediators. It is understood to exert inhibitory effects on central cyclooxygenase (COX) enzymes, particularly in the brain, thereby interfering with the production of prostaglandins ( PG E2). The reduction of PG E2 concentration in the hypothalamus specifically modifies the thermoregulatory set-point, leading to a peripheral vasodilation and heat dissipation cascade.

Dosage and Administration Information

Official Administration Guidelines

Febrex Plus Syrup is an oral liquid medication that must be used strictly according to the official dosing schedule to ensure proper use and safety. The formulation is typically a Fixed-Dose Combination (FDC) containing paracetamol, phenylephrine, and chlorpheniramine maleate.

Feature Official Instruction
Route of Administration Oral (by mouth).
Dosing Schedule Dose must be determined by the patient's age or weight. Typical pediatric doses are 2.5–5 mL for ages 2–6 years and 5–10 mL for ages 6–12 years.
Frequency and Timing The dose is repeated every 4 to 6 hours as required. The maximum number of doses must not exceed 4 or 5 within a 24-hour period.
Preparation Shake the bottle well before measuring each dose.
Administration Method The dose must be measured using the calibrated cup, spoon, or syringe supplied with the product. Do not use a household spoon.
Timing in Relation to Meals May be taken with or without food. Taking it with food may help to prevent stomach discomfort.
Missed Dose Rule If a dose is forgotten, administer it as soon as it is remembered. If it is almost time for the next scheduled dose, skip the missed dose and continue the regular schedule. Do not double the dose to make up for a missed one.
Duration of Use This product is intended for short-term use only. Do not continue administration for more than 3 to 5 days unless explicitly advised by a healthcare provider.

Note: Cough and cold preparations like this FDC are generally not recommended for use in children under 4 years of age.

Recent Clinical Evidence

Research Evidence / Overview of Studies for Febrex Plus Syrup


Evidence for Symptomatic Relief of the Common Cold

Research examining the use of this fixed-dose combination (FDC) therapy was studied for its potential role in managing the cluster of symptoms associated with the common cold and flu-like symptoms. The primary evidence comes from short-term randomized controlled trials (RCTs) and systematic reviews. This research explored how symptoms change over time. These studies typically included adult participants with acute symptoms, and they monitored the overall effect by using an aggregate measurement called the Total Symptom Score (TSS), which is relevant in evidence describing how symptoms are measured.

The findings describe patterns observed in the studies over the short follow-up period, particularly related to outcomes related to physical discomfort monitored during periods of heightened symptoms. For instance, studies report how symptoms evolved in the observed populations, noting changes related to elevated body temperature which was associated with the antipyretic component. Studies also explored patient-reported outcomes describing perceived discomfort, such as nasal congestion and a runny nose. This evidence contributes to understanding symptom patterns in the observed groups.

Evidence for Individual Symptom Components

Specific research was evaluated in studies focusing on the individual active components of the syrup: Paracetamol, Chlorphenamine Maleate, and Phenylephrine HCl. This evidence research describes the observed effects on outcomes related to systemic or functional imbalance, such as fever, and outcomes related to physical discomfort, such as minor pain.

For the component addressing fever and pain, studies monitored changes in measured body temperature (antipyresis) and monitored pain intensity using scales (analgesia). This body of research was observed in trials showing consistent patterns related to the temporary management of fever and minor aches. For the component acting on nasal issues, studies explored outcomes capturing phases of heightened symptom activity, such as runny nose and sneezing, and monitored objective and subjective scores for nasal airflow.

Understanding Evidence Quality and Uncertainty

The overall evidence contributes to the broader evidence landscape for the combination of components used in common cold remedies, but evidence quality varies across studies and across the different active components. The core evidence for the fever- and pain-reducing component is generally well-established. However, for the combination's full impact on all concurrent symptoms, the research is often categorized as moderate to low depending on the specific component and population being studied.

This is an important distinction: research does not determine whether an individual will respond similarly. The evidence highlights what is known—such as short-term changes in symptom scores—and what is still uncertain, such as the lack of long-term outcomes or the limited data available for certain vulnerable groups.

Key Studies & References

  1. MedlinePlus: Common Cold Treatment and Symptom Management

Frequently Asked Questions (FAQ)

Common questions about Febrex Plus Syrup (FAQ)

Q: Is Febrex Plus Syrup medically similar to a regular paracetamol-only syrup?

No. Febrex Plus Syrup is described as a Fixed-Dose Combination (FDC) that contains three active pharmaceutical ingredients. Regulatory documents state that it includes paracetamol, phenylephrine hydrochloride, and chlorpheniramine maleate. This composition is different from a syrup that contains only paracetamol for fever and pain relief.

Q: How quickly might the effects of Febrex Plus Syrup be noticeable?

According to official product information, the onset of action for the pain- and fever-reducing component is generally expected to be noticeable within a short time after the syrup is administered. The time it takes to notice overall symptomatic relief may vary among individuals.

Q: What is the expected duration of effect after a single use of Febrex Plus Syrup?

Regulatory documents indicate the duration of effect by the recommended dosing interval. Official guidance suggests that the maximum time between administrations is typically four to six hours, which is consistent with the expected duration of action for a single dose.

Q: If symptoms do not improve after a certain period, what general guidance is provided in product information?

The official product information advises that the medicine is for short-term use only. Patients are generally advised that they should consult a healthcare professional if symptoms persist or worsen after the specified maximum duration of self-treatment, which is typically noted as 3 to 5 days.

Q: Are there any known long-term effects described in regulatory safety reports for this syrup?

The regulatory safety label includes warnings regarding risks associated with prolonged, regular use. Specifically, warnings address the potential for serious adverse outcomes, such as liver injury, associated with long-term use of the paracetamol component.

Q: Does Febrex Plus Syrup carry warnings about interaction with common allergy medicines or antihistamines?

Yes, official warnings advise against concomitant use with other products containing paracetamol, other sympathomimetic amines (decongestants), or other antihistamines. These warnings are in place due to the risk of additive central nervous system effects, such as increased drowsiness.

Q: Is there any known interaction between Febrex Plus Syrup and common dietary supplements or multi-vitamins?

The official regulatory label documents known clinically significant interactions between the drug's components and other drugs, drug classes, or specific dietary supplements. Disclosure of all supplements used is generally advised to a healthcare provider.

Q: Is Febrex Plus Syrup approved or commonly used for infants and very young children?

The regulatory label specifies an age limit for use, and this product is generally contraindicated or not indicated for children below a certain age, such as those under 2 or 4 years old. The authorized indications and warnings contain the full eligibility criteria established by regulatory agencies.

Q: Is Febrex Plus Syrup classified as a controlled substance by regulatory agencies?

According to drug classification databases, the product is categorized as a non-controlled, multi-ingredient cold and flu remedy. It is typically classified as either Over-The-Counter (OTC) or Prescription-Only Medicine (POM), depending on the specific regulatory jurisdiction.

Q: What happens if a person misses a standard scheduled use of Febrex Plus Syrup?

The official guidance usually recommends taking the missed dose as soon as it is remembered, provided it is not almost time for the next scheduled dose. The guidance explicitly warns against taking a double dose to compensate for the missed administration.

Q: What guidance is available in regulatory documents for people with diabetes considering Febrex Plus Syrup?

The Warnings and Precautions section of the regulatory documents states that individuals with pre-existing conditions like diabetes are required to consult a healthcare professional prior to use. This caution may be related to the potential effects of the medicine's components or the excipients in the formulation.

Q: Can Febrex Plus Syrup be used for just a runny nose?

The product is officially indicated for the temporary relief of a combination of symptoms associated with the common cold, which includes a runny nose. The authorized use is for the cluster of symptoms defined in the Indications and Usage section, not typically for a single, isolated symptom.

Q: How does the composition of Febrex Plus Syrup differ from other combination cold syrups?

The composition of this syrup is explicitly defined as containing paracetamol, phenylephrine, and chlorpheniramine maleate. Other combination cold syrups on the market may contain a different profile of active components, such as an alternative decongestant or cough suppressant.

Q: Why is the syrup format, rather than a solid dose, often chosen for this specific drug combination?

The liquid dosage form (syrup) is generally cited in regulatory documents as being selected to facilitate administration, particularly in pediatric patients or those who have difficulty swallowing tablets. The liquid form allows for easier, more palatable administration.

Q: How does a generic equivalent of the active ingredients compare to the brand name Febrex Plus Syrup?

Regulatory requirements for generic equivalents mandate that they contain the exact same active ingredients, be of the same dosage form and strength, and achieve comparable systemic exposure as the brand-name product. This regulatory standard ensures therapeutic equivalence for the active components.

How should Febrex Plus Syrup be stored and disposed of?

Storage and Disposal for Febrex Plus Syrup

The storage requirements for Febrex Plus Syrup are defined in the official labeling to maintain product stability and safety. The syrup must be stored below 30 C or at the temperature specified on the bottle, and it is mandatory to not freeze the medicine. Environmental constraints require storage in a dry place and protection from light.

The container must be kept tightly closed in its original packaging. For safety, the medicine must always be stored out of the reach and sight of children. To prevent misuse and environmental harm, disposal of any unused or expired syrup must follow local regulations or a drug take-back program. Do not discard the medicine by pouring it into wastewater.

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

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