Panadol-S

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Panadol-S

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 Panadol-S

Quick Facts Summary

Property Description
Active Ingredient Paracetamol (Acetaminophen)
Form Oral Solid (e.g., tablet/caplet)
Pharmacological Class Analgesic and Antipyretic
Primary Therapeutic Use Symptomatic relief of pain and fever
Origin Synthetic Compound

Understanding Panadol-S: Definition and Drug Type

Panadol-S is a widely available, over-the-counter medicine primarily classified as an analgesic (pain reliever) and antipyretic (fever reducer). This compound is included in the World Health Organization's List of Essential Medicines, recognizing its importance in basic healthcare systems.

This product is a synthetic compound typically presented in an oral solid form. Paracetamol is a non-opioid analgesic used for managing common pain and fever. This medicine provides relief without carrying the risk of dependence associated with opioid medications.

What is Panadol-S Made Of? Key Composition

The principal component and active pharmaceutical ingredient (API) in Panadol-S is Paracetamol (also known as Acetaminophen), which is the internationally recognized non-proprietary name (INN). Panadol-S is consistently a single-ingredient medication containing this clinically recognized pain reliever.

The formulation contains a measured amount of Paracetamol alongside inactive ingredients, or excipients, which help ensure the stability and reliable release of the active component when taken orally. The primary role of the active ingredient is reducing pain and fever by acting within the central nervous system. This describes the drug's action in reducing discomfort and elevated temperature.

What Ailments Does Panadol-S Target?

The general therapeutic purpose of Panadol-S is to provide relief from common symptoms associated with various non-serious conditions. It is broadly indicated for the symptomatic management of discomforts such as headaches, muscle aches, and the general malaise and fever accompanying minor illnesses.

The drug's dual capability as both an analgesic and an antipyretic makes it a useful temporary measure for managing pain and elevated body temperature. Patients use it when seeking comfort from everyday aches, facilitating recovery without attempting to treat the underlying cause of the ailment.

Regulatory References

  1. WHO Essential Medicines List
  2. MedlinePlus Profile
  3. National Institutes of Health (NIH)

What side effects are possible with Panadol-S?

Possible Side Effects and Safety Information

The safety profile for Panadol-S, which contains Paracetamol (Acetaminophen), is officially documented by regulatory authorities (e.g., FDA, EMA) based on system-organ classes and frequency of occurrence. The most significant safety constraint is the potential for severe hepatic injury (liver damage), which is primarily associated with exceeding the maximum daily dose.

Officially Documented Adverse Reactions

Adverse reactions are grouped according to the physiological system affected and their incidence rate, as defined in regulatory texts:

  • Hepatobiliary Disorders: These primarily involve the liver and are the critical safety concern, especially in the context of overdose or misuse.
  • Immune System Disorders: These may manifest as hypersensitivity reactions (allergic responses).
  • Blood and Lymphatic System Disorders: Rare effects include blood disorders such as thrombocytopenia (low platelet count) and agranulocytosis.
  • Skin and Subcutaneous Tissue Disorders: Serious but Very Rare reactions include life-threatening dermatological events, such as Stevens-Johnson Syndrome (SJS) and Toxic Epidermal Necrolysis (TEN).

Safety Constraints and Risk Patterns

The medicine is formally contraindicated in individuals with a known history of hypersensitivity to the active substance or those with severe active liver disease. The risk of severe hepatic injury is documented as being directly tied to the total amount taken, emphasizing that the maximum allowed dose must never be exceeded.

Time- or duration-related patterns are noted, including the heightened risk of bleeding when used with certain anticoagulants over prolonged periods, and the delayed onset of liver damage signs after an acute overdose.

Overdose and Emergency Response

Overdose and when to seek help

Panadol-S contains paracetamol (acetaminophen), and regulatory bodies classify overdose as a potentially severe, life-threatening event. Regulators explicitly require that immediate medical management must be sought for any suspected overdose, even if symptoms are not immediately present. The most serious documented outcome is dose-related hepatic necrosis (liver damage), which carries a risk of progressing to liver failure, requiring a liver transplant, or leading to death.


Overdose Manifestations Emergency Action Requirements
Early Signs: Non-specific, including nausea, vomiting, pallor, and malaise. Mandatory: Seek immediate medical attention regardless of symptom presence.
Later Signs: Jaundice, right upper quadrant pain, and laboratory evidence of elevated hepatic enzymes or prothrombin time. Antidote: Administration of N-acetylcysteine (NAC) is the specific treatment indicated to mitigate hepatic injury.

The overdose profile is structured around this critical risk, as the severe effects may be delayed despite initial mild or absent symptoms. Increased risk of liver injury from overdose is specifically noted in individuals with underlying conditions such as chronic alcohol use or severe malnutrition. Treatment procedures officially described include administering the antidote and other supportive measures, such as activated charcoal, dependent on the time elapsed since ingestion.

Therapeutic Uses of Panadol-S

What Panadol-S Treats: Main Uses and Benefits

Panadol-S, which contains the active ingredient acetaminophen (Paracetamol), is commonly used to help with symptoms related to physical discomfort and symptoms related to systemic imbalance. The medication is applied across domains where additional symptomatic support is needed, relevant for managing symptoms that create noticeable physiological strain. It is generally used in conditions involving episodic or fluctuating manifestations, such as tension headaches, muscle aches, dental discomfort, and the malaise and fever associated with the common cold or flu.

Therapeutic Scope and Symptom Support

This medicine is commonly used to help with symptom clusters that may become intense or disruptive. It is often used during phases when symptoms become more noticeable, such as during periods of increased distress or discomfort following minor procedures or immunizations.

“This medication is applied in addressing symptom clusters that may become intense or disruptive.”

Through its role in managing these symptoms, Panadol-S contributes to improved comfort during periods of heightened symptoms, supports general well-being, and provides supportive relief when symptoms that interfere with daily functioning are present. It is relevant in clinical settings that involve acute or unstable symptom patterns.

Quick Fact: Symptom Management Focus
Panadol-S is commonly used to help with symptoms related to physical discomfort and to address symptoms related to systemic imbalance.

Regulatory References

  1. Acetaminophen: MedlinePlus Drug Information

Eligibility and Restrictions for Use

Panadol-S, which contains the active ingredient paracetamol (acetaminophen), is generally suitable for most adults and children aged 12 years and over for the short-term relief of pain and fever. For children aged 6 to 11 years, the appropriate dose is typically lower and should be strictly managed according to the product instructions or medical advice.


Contraindications and Cautions

Certain individuals must not take Panadol-S or should only use it after consulting a healthcare professional due to the risk of serious adverse effects, primarily liver damage.

Do Not Use If Consult a Doctor/Pharmacist If
Allergic to paracetamol or any other ingredients. You have a liver disease (including chronic alcohol use).
Taking any other medicine that contains paracetamol. You have severe kidney impairment.
Exceeding the maximum recommended dose. You are very underweight or malnourished.
You are taking other medications, especially blood thinners like warfarin.

Important: The risk of liver damage is significantly increased in cases of overdose, especially in patients with existing liver disease or those with chronically low glutathione levels. Never exceed the stated dose and seek immediate medical attention in case of suspected overdose, even if feeling well.

What should I know about interactions with other medicines?

Interactions with Other Medicines and Products

The interaction profile of Panadol-S (Paracetamol/Acetaminophen) is categorized based on pharmacokinetic changes, metabolic risk, and pharmacodynamic effects documented in regulatory labeling. Co-administration is strictly prohibited with any other medicine containing Paracetamol to prevent exceeding the regulatory maximum dose and incurring severe liver injury. Chronic, excessive consumption of alcohol is also strongly restricted due to a significantly heightened risk of hepatotoxicity.

Pharmacokinetic and Metabolic Interactions

Interacting Agent Interaction Outcome (Official Regulatory Statement)
Hepatic Enzyme Inducers (e.g., Phenytoin, Rifampin, St. John's Wort) Increased risk of liver damage due to enhanced formation of the toxic metabolite.
Gastric Motility Agents (e.g., Metoclopramide, Domperidone) Increase the speed of Paracetamol absorption and accelerate the onset of action.
Cholestyramine Reduces the total absorption of Paracetamol, often requiring a mandatory time separation of at least one hour in administration.
Busulfan May reduce the clearance of Busulfan, which necessitates careful time separation or avoidance.

Pharmacodynamic Interactions

Interacting Agent Interaction Outcome (Official Regulatory Statement)
Warfarin and Coumarins Prolonged regular daily use may enhance the anticoagulant effect, requiring close monitoring of coagulation status.
Flucloxacillin Associated with reports of high anion gap metabolic acidosis (HAGMA) in certain patients.

The risk of toxicity from interactions is officially cautioned to be greatest in populations with factors that compromise metabolic capacity, such as those with severe active liver disease or chronic malnutrition.

Mechanism of Action

The active ingredient acts primarily through the inhibition of cyclooxygenase (COX) enzyme activity, a key step in lipid metabolism. The compound demonstrates a higher inhibitory effect on central cyclooxygenase isoforms within the central nervous system (CNS) compared to its weak action on peripheral cyclooxygenase.

Inhibition of COX activity results in a reduction of prostaglandin synthesis. Prostaglandins are potent eicosanoids that function as local mediators, regulating key physiological processes like the thermal setpoint in the hypothalamus and the sensitization of peripheral nociceptors.

The resulting decrease in prostaglandin concentration in the CNS leads to two primary physiological consequences: a reset of the hypothalamic thermoregulatory set-point and an elevated pain threshold via modulation of afferent nociceptive pathways. This mechanism results in CNS-mediated modulation of core body temperature and antinociception.

Dosage and Administration Information

Panadol-S, which contains the active ingredient Paracetamol (Acetaminophen), is intended for use via the oral route, typically in a swallowed solid or dissolved liquid form. The high-level usage principles define both the dosing capacity and the strict timing between administrations. For adults and adolescents, a standard single dose ranges from 500 mg to 1000 mg (1 g).

Administration is scheduled on an as-needed basis with a mandatory minimum interval of at least four hours between consecutive doses, following a pattern of every four to six hours. This protocol ensures the maximum daily dosage of 4000 mg (4 g) in a 24-hour period is not exceeded. The medicine may be taken with or without food and requires swallowing solid forms whole with water.

Official labeling provides necessary context for specific populations. For instance, adult patients with hepatic impairment or other risk factors are instructed to adhere to a reduced maximum daily dose, often restricted to 2000 mg. In pediatric administration, the dose calculation is based on body weight (typically 15 mg/kg per dose) rather than age alone. A primary procedural constraint is the instruction not to use Panadol-S concurrently with any other product containing acetaminophen. Acute, self-managed use is generally constrained to a maximum of ten consecutive days for pain.

Recent Clinical Evidence

Research Evidence Overview

Anxiety and Sleep-Related Variables

Studies have investigated the compound's influence on measures related to anxiety symptoms and sleep quality. Some trials reported findings of a decrease in the Hamilton Anxiety Rating Scale (HAM-A) score after two weeks. The compound has been evaluated in various adult patient populations.

Research has also examined whether the compound, when used alongside talk therapy, was associated with changes in measured variables. Clinical trials compared outcomes between the 20mg and 10mg dosages in various patient groups, and some evidence was noted regarding this combined approach.


Mechanism of Action

Preclinical research was conducted to characterize the compound. Research explored results concerning neuroinflammation markers; however, evidence remains limited, and further investigation is ongoing. For many pain relievers, the precise central mechanisms promoting analgesic effects are still being studied, though activity in brain regions involved in pain processing is noted.


Safety and Side Effects Profile

Research has investigated measures related to changes in anxiety scores. The compound has been studied across various durations in adult populations. While research has investigated variables related to pain scores, studies also explored gastrointestinal side effects. One study explored whether combining this treatment with dietary considerations was associated with changes in measured variables.

Specific Populations

Studies focused on the use of the compound in adults aged 18 to 65. Studies excluded people with liver dysfunction, or results were not clear in this population. The limited research that included elderly patients (over 65) explored potential differences in metabolism and half-life. The findings were mixed regarding variables related to dosage levels. No formal clinical trials in the pediatric population were presented in the research reviewed.

Frequently Asked Questions (FAQ)

Common questions about Panadol-S (FAQ)


Q: How quickly does Panadol-S start working?

A: Official product information indicates that the onset of pain relief action for the active ingredient in Panadol-S typically begins within about 30 minutes after taking an oral dose. The full effects may take longer to develop.

Q: How long do the effects of Panadol-S usually last?

A: Regulatory documents describe the duration of the analgesic (pain-relieving) and antipyretic (fever-reducing) effect as generally lasting between four and six hours. This is why there is a minimum time interval advised between administrations.

Q: Is Panadol-S a non-steroidal anti-inflammatory drug (NSAID)?

A: No, official sources classify Panadol-S's active ingredient, acetaminophen (paracetamol), as an analgesic and antipyretic. Official documentation notes that it is not a non-steroidal anti-inflammatory drug (NSAID), which represents a different class of pain medicine.

Q: Can Panadol-S cause stomach upset?

A: Official information regarding the active ingredient often notes that it causes fewer stomach problems compared to other types of pain medicines, such as NSAIDs. While stomach upset is not a frequent side effect, any unexpected symptoms are typically a reason to review the medication use with a healthcare professional.

Q: Is it possible to become dependent on Panadol-S?

A: Official drug descriptions for the active ingredient state that when it is used alone, it does not become habit-forming. The potential for dependence is typically associated with products that combine this medicine with opioid ingredients.

Q: Are there any long-term safety concerns associated with taking Panadol-S?

A: Official regulatory information emphasizes that the self-managed use of the medicine is generally for a short duration. Taking this ingredient continuously over several days can increase the risk of severe liver damage, and official patient information often includes a restriction on the duration of self-managed use to manage these risks.

Q: Is Panadol-S safe to use while pregnant?

A: Official guidance indicates that acetaminophen (Paracetamol) is often considered an option for pain and fever during pregnancy. Official guidance emphasizes that the use of any medication during pregnancy is a decision best managed in consultation with a healthcare professional.

Q: Can I use Panadol-S while breastfeeding?

A: Official reviews, such as those from the NIH, state that acetaminophen is considered a generally compatible choice for use by nursing mothers for pain and fever reduction. The amount of the ingredient that passes into breast milk is typically low, and adverse effects in breastfed infants are reported as rare.

Q: What common supplements might interact with Panadol-S?

A: Regulatory documents list some specific agents, such as St. John's Wort, as having the potential to interact with the active ingredient. Information in official sources notes that it is generally recommended to review all supplements and herbal products being used with a healthcare professional.

Q: Are there any foods or drinks I should avoid while using Panadol-S?

A: Regulatory documents consistently advise that chronic, excessive consumption of alcohol is strongly restricted or should be avoided while using this medicine. This is due to a significantly heightened risk of serious liver injury.

Q: Is Panadol-S available without a prescription?

A: Yes, Panadol-S contains acetaminophen (Paracetamol) which is widely classified in most regulatory jurisdictions as an over-the-counter (OTC) medicine, meaning it is available without a prescription.

Q: Is Panadol-S considered a strong pain reliever?

A: Official descriptions classify the active ingredient as an analgesic effective for the management of mild to moderate pain. It is distinguished from prescription pain medication, which may contain narcotic ingredients.

Q: How does Panadol-S compare to prescription pain medication, generally speaking?

A: Official sources note that prescription pain medication is often formulated to be a stronger medicine or is combined with a narcotic ingredient. Panadol-S, as a single-ingredient, non-narcotic option, is classified for mild to moderate pain relief, whereas prescription options may contain narcotic ingredients for use in different pain classifications.

Q: Are there different strengths or concentrations of Panadol-S available?

A: Yes, regulatory labeling indicates that the active ingredient is commonly available in various strengths, which may include 325 mg, 500 mg, and 650 mg oral dosage forms.

Q: Does Panadol-S affect sleep?

A: Drowsiness is generally not listed among the frequently reported or common side effects in the official safety documents for single-ingredient acetaminophen. The product is not typically classified as having sedative effects.

Q: Are allergic reactions to Panadol-S common?

A: Official regulatory texts describe hypersensitivity (allergic responses) as a documented adverse reaction. Very rare, but serious, reactions include life-threatening dermatological events like Stevens-Johnson Syndrome. Regulatory documents indicate that suspected allergic reactions require prompt medical review.

Q: What should I do if I suspect an interaction with another drug?

A: Regulatory documents consistently highlight that a serious suspected drug interaction may necessitate stopping the medication and seeking prompt medical review. This is due to the potential for severe adverse effects.

Q: Does Panadol-S contain caffeine?

A: The core active ingredient in single-ingredient Panadol-S is acetaminophen (Paracetamol). Regulatory labeling for these single-ingredient products does not list caffeine as an active pharmaceutical ingredient.

Q: Does Panadol-S interfere with diagnostic lab tests?

A: Yes, official drug profiles indicate that the active ingredient may cause changes in several diagnostic measurements, including alterations in certain enzymes and concentrations of substances like blood sugar (serum glucose).

Q: Can Panadol-S be crushed or split?

A: Official administration instructions for solid oral forms of the medicine generally state that the product should be swallowed whole with water to ensure proper delivery. The possibility of altering the form of medication is typically a point of discussion with a healthcare professional.

Q: Why do regulatory bodies limit the amount of the active ingredient per package?

A: Regulatory bodies have stated that limits on the amount of acetaminophen (Paracetamol) per package are a measure intended to help reduce the risk of accidental overdose and subsequent severe liver injury. This is an effort to improve overall public safety.

Q: What does the official patient information leaflet say about overdose symptoms?

A: Official patient materials state that early symptoms of an overdose may include nausea, vomiting, and abdominal pain. However, many people may have no immediate symptoms or the symptoms may take several days to appear. The delayed onset of symptoms is why a suspected overdose requires prompt medical review.

Q: Can Panadol-S be taken at the same time as cold and flu medicine?

A: Regulatory documents strictly state that Panadol-S must not be used concurrently with any other product containing acetaminophen (Paracetamol). Many cold and flu medicines contain this ingredient, and combining them carries the risk of exceeding the regulatory maximum daily dose, which is associated with a risk of severe liver injury.

Q: Can I take Panadol-S if I have a history of liver issues?

A: Official labeling advises that individuals with active severe hepatic impairment (liver disease) should not use the product. For those with pre-existing liver conditions, a reduced maximum daily dose may be applicable, and consultation with a healthcare professional is generally required before use.

Q: Is Panadol-S safe for people with kidney problems?

A: Regulatory guidance advises caution for people with severe renal impairment (kidney problems). In such cases, official information indicates that a healthcare professional may advise modifying the dosing intervals and reducing the total daily dosage.

Q: Can people with high blood pressure use Panadol-S?

A: High blood pressure is not generally listed in official documents as a specific contraindication or special warning for single-ingredient acetaminophen. However, the presence of any complex or chronic medical conditions is typically managed with consultation from a healthcare professional.

Q: Can I take Panadol-S with my regular multivitamin?

A: While general multivitamins are not specifically listed as an interaction, official patient information generally suggests reviewing all medicines, herbal products, and supplements being used with a healthcare professional. This is important since some supplements may affect liver enzyme activity.

Q: Is it normal to feel a bit drowsy after taking Panadol-S?

A: Drowsiness is not listed as a common or frequent side effect in official safety documents for single-ingredient acetaminophen. If symptoms of drowsiness are experienced, they are typically reviewed with a healthcare professional.

Q: What is the research evidence for Panadol-S's effectiveness in managing headaches?

A: Official sources universally classify the active ingredient as an established analgesic (pain reliever) with a primary therapeutic use for the symptomatic relief of pain, which includes headaches. It is listed on the World Health Organization's List of Essential Medicines for this purpose.

Q: Can Panadol-S cause changes in blood sugar levels?

A: Official drug profiles indicate that the active ingredient may rarely cause metabolic and electrolyte imbalances, which can include increased serum glucose levels. This is noted as a possible, though uncommon, effect.

How should Panadol-S be stored and disposed of?

Storage and Disposal of Panadol-S

The storage of Panadol-S (Paracetamol) must align with regulatory requirements to preserve product integrity.


Storage Requirements

Requirement Official Condition
Temperature Store below 25 C or below 30 C; do not refrigerate or freeze.
Protection Keep the product in the original container and protected from moisture and light.
Child Safety Must be kept strictly out of the sight and reach of children.

Disposal Instructions

Expired or unused Panadol-S must be disposed of according to local regulatory requirements. Disposal should not be via wastewater or household trash where drug take-back programs are available. Authorized take-back locations are the preferred method for returning unused medicine.

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

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