Theraflu TS

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Theraflu TS

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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 Theraflu TS

Quick Facts

Property Description
Active Ingredients Dextromethorphan Hydrobromide, Pseudoephedrine
Form Oral Solution (Syrup)
Pharmacological Class Antitussive, Nasal Decongestant
Common Use Symptomatic relief of cough and nasal congestion
Origin Synthetic

What is Theraflu TS and What Class of Medicine is It?

Theraflu TS is a specific synthetic, multicomponent pharmaceutical preparation administered as an oral solution or syrup, designated as an over-the-counter (OTC) medicine for acute respiratory discomfort. Pharmacologically, it is a dual-action product, combining compounds from two key pharmacological categories: an antitussive (cough suppressant) and a nasal decongestant.

This formulation is clinically recognized for its approach to concurrent symptom relief. Its primary aim is to offer reliable symptomatic relief for upper respiratory issues, such as easing the discomfort associated with a persistent cough and significant nasal obstruction.


Core Composition: Active Ingredients and Differentiation

The medicine's efficacy is based on the two distinct synthetic active ingredients: Dextromethorphan Hydrobromide and Pseudoephedrine. Dextromethorphan addresses the cough component, while Pseudoephedrine provides the decongestive action. Theraflu TS is typically formulated as an antihistamine-free preparation, which differentiates it from other cold medicines that may cause sedation.

Dextromethorphan Hydrobromide is a non-opioid derivative classified as an Antitussive Agent and the Pseudoephedrine component belongs to the class of sympathomimetic amines. These compounds are dissolved within an aqueous vehicle, a form often utilized for ease of oral administration.


What is the General Benefit of This Combination Drug?

The general benefit is the provision of efficient dual symptomatic management, reducing the intensity of the cough and concurrently improving nasal airflow. The dual action is achieved through central cough suppression and localized vasoconstriction. The Dextromethorphan component works centrally to suppress the urge to cough, and the Pseudoephedrine component narrows the small blood vessels in the nasal lining. This synergy facilitates greater patient comfort and supports easier breathing by alleviating combined respiratory symptoms.

Regulatory References

  1. Dextromethorphan and Pseudoephedrine in combination (DailyMed)

What side effects are possible with Theraflu TS?

Possible Side Effects and Safety Information

The officially documented safety profile of this medicine, containing Dextromethorphan and Pseudoephedrine, is defined by adverse reactions classified across several System-Organ Classes. These classifications reflect how government regulatory documents organize and communicate the medicine’s safety profile, ranging from common occurrences to rare but serious adverse reactions.

Frequency-Classified Adverse Reactions

The most frequently documented side effects are categorized as Common, primarily involving the Central Nervous System and Gastrointestinal systems. These may include nervousness, insomnia, drowsiness, dizziness, nausea, and palpitations. Effects that are classified as Rare or where the Frequency is Not Known include clinically significant events such as severe hypertension, Serotonin Syndrome, Cerebrovascular accident (stroke), Ischaemic optic neuropathy, and a severe skin reaction known as Acute Generalised Exanthematous Pustulosis (AGEP).

System-Organ Classes and Safety Constraints

The medicine's adverse reaction scope includes effects on the Nervous System, Psychiatric, Cardiac, Vascular, and Renal/Urinary systems. Examples include temporary urinary retention, hypertension, and restlessness. Safety constraints in regulatory labels strictly prohibit the use of this product in individuals taking or who have recently taken Monoamine Oxidase Inhibitors (MAOIs), or those with severe hypertension or severe coronary artery disease. Furthermore, the official labeling includes specific population considerations, noting that this type of product is generally not recommended/contraindicated for use in children younger than 12 years of age and that older adults may be at higher risk for certain adverse effects.

Overdose and Emergency Response

A potential overdose of products containing Dextromethorphan and Pseudoephedrine may result in severe manifestations affecting the central nervous and cardiovascular systems. Officially documented clinical manifestations include CNS effects such as confusion, dizziness, hallucinations, and critical events like seizures and coma. Cardiovascular instability may present as high or low blood pressure, rapid or irregular heartbeat (arrhythmia), and in severe cases, cardiovascular collapse. Significant breathing problems, including respiratory depression or cessation of breathing, are documented concerns, especially in young children. Severe outcomes are also reported in the elderly population.

Specific neurovascular complications, such as Posterior Reversible Encephalopathy Syndrome (PRES) and Reversible Cerebral Vasoconstriction Syndrome (RCVS), are identified risks. The official guidance requires that immediate medical attention be sought right away for any suspected overdose, emphasizing that quick professional care is critical for all individuals, even those without noticeable symptoms.

Urgent help must be called if the person is unresponsive, having a seizure, or experiencing trouble breathing. Management measures documented in official sources include hospital monitoring, such as measuring vital signs, performing an Electrocardiogram (ECG), and conducting blood tests. Supportive interventions described include the administration of activated charcoal, IV fluids, and necessary breathing support.

Therapeutic Uses of Theraflu TS

What Theraflu TS Treats: Main Uses and Benefits

Theraflu TS may be part of symptomatic management applied in addressing symptoms related to systemic imbalance and symptoms of heightened physiological activity associated with the common cold or flu. This product may be applied in addressing symptom clusters that may become intense or disruptive, and may help patients cope more steadily with symptom fluctuations.

This type of product is generally used to help with symptom clusters that interfere with daily comfort. This is relevant for easing symptoms related to physical discomfort, such as aches, headache, sore throat, and symptoms of increased neurological or muscular activity like cough and congestion. It is commonly used across conditions presenting with acute episodes of respiratory symptoms.

Quick Fact: May Assist with Symptoms related to Aches, Congestion, and Fever

Containing active ingredients commonly used for symptom management, it provides support that helps ease the overall symptom burden. This is relevant in contexts involving heightened systemic burden, as it assists with maintaining functional stability when symptoms interfere with routine activities. It may be part of symptomatic management when short-term symptomatic assistance is needed.

Regulatory References

  1. Label: THERAFLU DAYTIME SEVERE COLD AND COUGH- acetaminophen, dextromethorphan, phenylephrine powder, for solution - DailyMed

Eligibility and Restrictions for Use

Eligibility Map: Who Can and Cannot Use Theraflu TS — Official Regulatory Information

Eligibility Scope

  • Populations for whom use is allowed (as stated in label): Use is generally allowed for adults and children 12 years of age and older.
  • Populations for whom use is not recommended (if applicable): The label advises that nursing mothers should not use this product, and pregnant women must consult a health professional before use.
  • Populations for whom use is contraindicated: Use is strictly contraindicated in children under 12 years of age. It is also prohibited for any patient currently taking or having taken a Monoamine Oxidase Inhibitor (MAOI) within the last 14 days.
  • Age-related eligibility rules: The minimum age for use is 12 years; use is not established or prohibited for younger children.
  • Condition-specific eligibility rules: Contraindications also include patients with severe or uncontrolled hypertension or coronary artery disease. Use requires consultation for those with liver disease, heart disease, diabetes, thyroid disease, or a cough associated with conditions like asthma or excessive phlegm.
  • Pregnancy and lactation eligibility status (if explicitly documented): Contraindicated in nursing mothers and requires professional consultation during pregnancy.
  • Eligibility-related restrictions: Individuals with an enlarged prostate causing urination problems must consult a doctor prior to use.

Eligibility Classifications (High-Level)

  • Eligibility severity classification (as defined in official documents): Contraindicated (Absolute Prohibition), Restricted Use (Consultation Required/Use with Caution), and Allowed (Standard Use).
  • Regulatory basis (EMA / FDA / etc.): Based on the combined official prescribing information and labeling for Dextromethorphan and Pseudoephedrine from regulatory bodies including the FDA and EMA-aligned national authorities.
  • Eligibility-context constraints (as defined in official documents): Constraints are based on concurrent drug use (MAOI), pre-existing disease severity (Severe Hypertension), organ function, and physiological status (Pregnancy/Lactation).

Resulting Eligibility Structure

  • Official eligibility statements:
    • Contraindicated for use in children under 12 years of age.
    • Do not use if taking an MAOI or for 14 days after stopping an MAOI.
    • Contraindicated in patients with severe hypertension or severe coronary artery disease.
    • Patients with diabetes, heart disease, or difficulty urinating due to prostate issues must consult a doctor before use.
    • Not recommended for use in nursing mothers.

Connection to the overall eligibility profile: Official regulatory documents define who can and cannot use the medicine by establishing clear-cut boundaries: contraindications immediately exclude populations with severe cardiovascular, endocrine, or renal conditions, as well as those on specific interacting medications. Age restrictions set a minimum threshold for standard use, and conditional statements mandate professional consultation for groups with specific chronic diseases or physiological states like pregnancy, thereby restricting general over-the-counter eligibility.

What should I know about interactions with other medicines?

Theraflu TS is a combination medicine, and its components can interact with various drugs and substances. Consulting a healthcare provider or pharmacist about all current medications, including prescription, over-the-counter, and herbal supplements, is essential before use.

Major Interactions

Monoamine Oxidase Inhibitors (MAOIs): Do not use Theraflu TS if you are currently taking a prescription MAOI (for depression, psychiatric conditions, or Parkinson’s disease) or within two weeks of stopping an MAOI. This combination can lead to a severe, potentially fatal drug interaction, significantly increasing the risk of high blood pressure and other serious side effects.

Interactions with Specific Drug Classes

Drug Class Potential Interaction Recommendation
Other Acetaminophen Products Increased risk of severe liver damage from overdose. Strictly avoid taking with any other product containing acetaminophen.
Sedatives, Tranquilizers, Alcohol Increased central nervous system (CNS) side effects like drowsiness, dizziness, and impaired coordination. Avoid alcoholic beverages and use caution when combining with drugs that cause sedation.
Other Sympathomimetics Increased risk of cardiovascular side effects (e.g., increased heart rate, high blood pressure) due to additive effects. Avoid other nasal decongestants or appetite suppressants.

Other Important Considerations

Theraflu TS may interfere with the results of certain laboratory tests, such as urine drug screens. Individuals with pre-existing health conditions like liver disease, high blood pressure, heart disease, diabetes, or glaucoma should use this product only under the direction of a healthcare professional.

Mechanism of Action

Modulation of the Central Cough Reflex Arc

This domain covers the central action of Dextromethorphan which involves agonism at the sigma1 receptor and antagonism at the NMDA receptor within the brainstem's cough center. This dual molecular interaction engages mechanisms that modulate activity within specific neural reflex pathways, which contributes to elevating the neural threshold for cough initiation.


Activation of Peripheral Vascular Receptors

This domain focuses on the peripheral action of Pseudoephedrine, which increases synaptic norepinephrine concentration and directly stimulates alpha1-adrenergic receptors on nasal blood vessels. This initiates a vasoconstriction cascade that is relevant in systems where targeted adjustment of local blood vessel tone is required, and results in a reduction of mucosal tissue edema and a decrease in airway resistance.


Synergy of Dual Pathway Targeting

Theraflu TS engages mechanisms that regulate both the central neural command and the peripheral vascular tone. This combination influences signal dynamics across targeted pathways, offering a complementary action that influences two fundamental components of the central neural reflex and peripheral vascular tone simultaneously.

Dosage and Administration Information

The established usage patterns for the Dextromethorphan and Pseudoephedrine combination product are documented within the official labeling, defining the standard administration protocol for this oral solution. This protocol strictly defines the route, dose, frequency, and duration of use.


Administration Scope

Instruction Entity Detail
Route of administration Oral route only, utilizing the liquid solution (syrup).
Dosing schedule 30 mL per dose for individuals 12 years of age and over. The dose must not exceed 3 doses (90 mL total) within a 24-hour period.
Timing in relation to meals (if applicable) Not explicitly specified; may be administered without a specified relation to food.
Preparation requirements (if applicable) Requires accurate measurement of the 30 mL dose using the enclosed dosing cup or an equivalent measuring device.
Age-group administration rules Approved for individuals 12 years of age and older. Not for use in children under 12 years of age.
Course duration / cycle information Use is limited to a maximum duration of 7 days.

Instruction Classifications (High-Level)

Classification Entity Detail
Administration method type Oral liquid administration.
Frequency pattern As-needed (PRN), with a fixed interval of every 6 hours.
Use-context constraints Maximum 7-day duration constraint and minimum 12-year age constraint.

Resulting Procedural Structure

The standard protocol requires an initial step of measuring the single 30 mL dose using the dedicated dosing cup, followed by oral administration. A fixed 6-hour interval must be maintained between subsequent uses. The regimen is strictly limited, mandating that the maximum daily intake of 90 mL is not exceeded. Administration is restricted to individuals 12 years of age and older, and the total duration of self-treatment is officially limited to seven days. This procedural structure defines the standardized use of the oral solution as defined by established standards.

Recent Clinical Evidence

Research Evidence / Overview of Studies for Theraflu TS

1. Research Evidence for Cough Relief

The research base that includes studies of the cough-suppressant component, Dextromethorphan, consists of short-term Randomized Controlled Trials (RCTs) and summaries known as meta-analyses. These are studies conducted during periods of increased symptom activity and were applied in research exploring how symptoms change over time. Researchers studied changes in cough frequency and cough severity scores, which are patient-reported outcomes describing perceived discomfort. These studies primarily included adults experiencing an acute cough associated with the common cold.

Studies monitored how symptoms evolved in the observed populations, with patient-reported outcomes describing perceived discomfort. Research highlights changes measured during the study period, but findings varied across different clinical trials. Evidence aggregated in systematic reviews describes heterogeneity across studies. The data show patterns related to symptom changes, and evidence quality varies across studies.


2. Research Evidence for Nasal Congestion Relief

The research exploring the decongestant component, Pseudoephedrine, was examined in double-blind, placebo-controlled studies. These trials are relevant in evidence describing how symptoms are measured and are designed to assess short-term or episodic symptom patterns related to an irritative state. The study outcomes examined include patient-reported outcomes describing the instantaneous nasal congestion severity.

Research describes data related to symptom variability observed in the studies when compared to inactive placebo treatments, particularly across multiple age groups. The research scenarios focused on the acute period following administration, typically within 8 hours of a single dose. This evidence contributes to the broader evidence landscape used in research exploring how symptoms change over time.


3. Evidence and Findings in Specific Populations

The evidence base has included studies evaluating the ingredients in children, particularly for outcomes related to nasal congestion in children aged six years and older. However, when examining cough relief, data for children and adolescents remain insufficient and inconclusive. For older adults or individuals with complex comorbid conditions, the available evidence is limited.


4. Summary of Evidence Consistency and Research Gaps

Long-term effects are not fully established, as the primary goal of the clinical evaluation was to observe responses over defined, short time intervals when symptoms are at their height. The evidence base for the two active components differs: studies for the decongestant report consistent short-term changes, while research for the cough-suppressant ingredient has yielded variable findings. Comparative evidence against other treatments remains limited, and data for certain groups remain insufficient.

Frequently Asked Questions (FAQ)

Common questions about Theraflu TS (FAQ)


Q: How quickly does Theraflu TS usually start to work?

Information indicates that symptom changes are generally observed shortly after the medicine is taken. Research on the decongestant component notes the trials focused on changes observed in the acute period, with effects typically expected to last up to six hours.


Q: What is the typical duration of effect for a dose of Theraflu TS?

According to the official product information, the duration of a single dose's effect is described as lasting for up to six hours.


Q: Is it okay to drive or operate machinery after taking Theraflu TS?

Official warnings state that the user should not drive or operate heavy machinery until they know how the medicine affects them. This is due to the potential for side effects like drowsiness or dizziness, which could impair coordination or judgment.


Q: Can Theraflu TS be taken on an empty stomach?

Regulatory documents state that the administration protocol for this medicine does not have a specified relation to food. This indicates that it may be administered without having to take it with a meal.


Q: Is Theraflu TS considered safe for individuals with kidney issues?

Official safety restrictions strictly prohibit the use of this medicine in patients who have severe acute or chronic kidney disease or failure. Individuals with other pre-existing kidney issues are advised to consult a health professional to determine their eligibility prior to use.


Q: Does Theraflu TS contain ingredients that affect sleep?

The medicine contains Pseudoephedrine, an active ingredient that belongs to a class of compounds known as sympathomimetic amines. This ingredient is linked in official documents to side effects such as nervousness, restlessness, and insomnia (trouble sleeping).


Q: What is the main difference between Theraflu TS and other common cold remedies?

Official documentation notes that Theraflu TS is an antihistamine-free formulation. This differentiates it from certain cold and flu products that contain antihistamines.


Q: If I feel dizzy after taking Theraflu TS, is that considered normal?

Dizziness and drowsiness are listed in official safety documents as common adverse reactions. If these effects persist or cause concern, consulting a health professional is advised.


Q: What should be done if someone accidentally takes too much Theraflu TS?

In case of accidental overuse or overdose, regulatory documents advise seeking immediate professional assistance. Contacting a Poison Control Center is noted as appropriate in this situation.


Q: Is there a maximum number of days Theraflu TS should be used consecutively?

Official administration guidance specifies that the use of this medicine for self-treatment is strictly limited to a maximum duration of seven consecutive days.


Q: Why is Theraflu TS only available by prescription in some regions?

Regulatory access rules for the ingredient Pseudoephedrine vary by region. This is due to laws related to its potential use in the illegal manufacturing of certain substances, which influences its classification as an over-the-counter or behind-the-counter medicine.


Q: Can Theraflu TS be taken alongside a daily vitamin regimen?

Official guidance on drug interactions advises consulting a health professional about all current products, including vitamins and herbal supplements, before using the medicine. This is consistent with the general guidance for drug and supplement use.


Q: Does Theraflu TS contain a stimulant ingredient?

The active ingredient Pseudoephedrine is classified as a sympathomimetic amine. This type of compound is sometimes described in official documents as belonging to the class of stimulants.


Q: Are there any known long-term effects associated with Theraflu TS use?

As the product is officially intended for short-term use, the long-term effects of taking it are not fully established. Official regulatory labeling does not recommend use beyond the maximum seven-day duration.


Q: Is Theraflu TS known to worsen asthma or other breathing conditions?

Official precautions state that the medicine should not be used for a persistent or chronic cough. This includes a cough associated with conditions like asthma or emphysema, unless use is specifically directed by a health professional.


Q: Can Theraflu TS be taken with antacids?

Regulatory interaction information indicates that caution is advised when taking the medicine with frequent or high-dose antacids. Caution is advised because antacids may potentially affect the level of one of the active ingredients.


Q: Does Theraflu TS contain any artificial sweeteners or colors?

The official product label lists all inactive ingredients, which typically include all specific colors, flavorings, and sweeteners used in the formulation. Similar products often contain sweeteners such as sucralose or saccharin sodium, and specific colorants.


Q: Are there any known interactions between Theraflu TS and herbal supplements?

Official documents warn that the medicine may interact with certain herbal products, such as St. John's wort. Users are advised to consult a health professional regarding all supplements they are currently taking.

How should Theraflu TS be stored and disposed of?

The official regulatory profile for Theraflu TS strictly defines its storage and disposal requirements.

Storage

The medicine must be stored at a controlled room temperature ranging from 20 C to 25 C (68 F to 77 F). The product must be protected from excessive heat and moisture to maintain stability. It should remain in its original, tightly closed container.

Safety and Disposal

It is mandatory to store the medication out of the sight and reach of children. For disposal, unused or expired product should be taken to a drug take-back program or an authorized collection site. The medicine must not be thrown in household trash or poured down a drain unless specifically instructed by official government guidance.

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

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