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Boots Kaolin & Morphine Mixture

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Boots Kaolin & Morphine Mixture

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Treatment option:

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.

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Overview of Boots Kaolin & Morphine Mixture

What is Boots Kaolin & Morphine Mixture?

Boots Kaolin & Morphine Mixture is an oral suspension formulated to assist in the symptomatic relief of occasional, sudden-onset diarrhea. It belongs to a category of medications known as antidiarrheals, designed to reduce the frequency of bowel movements and improve the consistency of stools.

Composition and Ingredients

The mixture is characterized by its combination of active ingredients that work through different mechanisms:

  • Kaolin Light: A natural mineral (hydrated aluminium silicate) that acts as an adsorbent. It works by binding to toxins and bacteria within the digestive tract, helping to remove substances that may be causing irritation.
  • Morphine Hydrochloride: Included at a low therapeutic dose, morphine acts as an antimotility agent. It slows the muscular contractions (peristalsis) of the intestines, allowing more time for water to be reabsorbed into the body.
  • Sodium Bicarbonate: Frequently included in such mixtures to help neutralize excess stomach acid and maintain the stability of the formulation.

Physical Characteristics

This medication is typically presented as a thick, chalky liquid. Due to the nature of kaolin, the solids tend to settle at the bottom of the bottle over time, requiring the mixture to be shaken thoroughly before use to ensure the ingredients are evenly distributed.

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What side effects are possible with Boots Kaolin & Morphine Mixture?

Possible Side Effects and Safety Information

The official safety documentation for Kaolin and Morphine Mixture BP outlines potential adverse effects primarily linked to its active opioid component, Morphine Hydrochloride. The frequency of most listed reactions is often classified as not known in regulatory documents, meaning an occurrence rate cannot be reliably estimated from available data.


Officially Documented Adverse Reactions

Adverse reactions are officially grouped by the system-organ class affected, including Gastrointestinal disorders (such as constipation, nausea, and vomiting), and Nervous system disorders (including dizziness and drowsiness). The potential for Hypersensitivity Reactions is also documented, which may manifest as a rash within the Skin and subcutaneous tissue disorders class.


Regulatory Safety Constraints

The most significant safety consideration is the risk of Drug Dependence, which is noted in regulatory texts as being associated with prolonged use. The preparation is subject to strict regulatory constraints and is contraindicated for several specific groups and conditions:

  • Children under 12 years of age.
  • Patients with gastrointestinal obstruction.
  • Acute diarrhoeal diseases caused by specific infectious agents (e.g., Salmonella, Shigella).

Special care is officially required when administering the mixture to older or debilitated patients, and caution is noted for those with pre-existing hepatic impairment or renal impairment. These constraints define the appropriate use and limitations of the mixture as specified in government regulatory labels.

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Overdose and Emergency Response

Overdose and When to Seek Help: Official Regulatory Information

The official overdose profile for this mixture is primarily driven by the opioid component (Morphine Hydrochloride) and is classified as life-threatening in severe cases. Overdose manifestations documented in regulatory sources include profound sedation, severe sleepiness, and progression to coma (inability to respond or wake up).

Documented Manifestations and Severe Outcomes

The most critical sign is respiratory depression, presenting as breathing that is slowed, shallow, or difficult, which carries the risk of fatal overdose and death. Additional official manifestations include hypotension. The mixture's non-opioid component may contribute to a physiological finding of metabolic alkalosis following excessive administration.

Emergency Actions Mandated by Regulators

Regulatory authorities mandate that individuals must seek immediate medical attention or contact emergency services (e.g., call 911 or the equivalent national number) immediately if signs of respiratory problems, severe sleepiness, or an inability to wake up occur. Accidental ingestion in children is explicitly noted in official warnings as potentially resulting in a fatal overdose, necessitating urgent medical intervention.

Supportive Measures and Monitoring

Management involves providing symptomatic and supportive treatment. The use of an opioid reversal agent, Naloxone, is described as available for emergency treatment. Monitoring for sedation and persistent respiratory depression is required in all overdose cases.

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Therapeutic Uses of Boots Kaolin & Morphine Mixture

The mixture is commonly used for symptomatic relief, applied where additional support is needed for acute gastrointestinal disturbances in adults and adolescents. Specifically, the preparation is utilized for the relief of the symptoms of diarrhea and upset stomachs in adults and children over 12 years of age.


Main Uses and Therapeutic Benefit

The mixture is commonly used to help with symptomatic management of mild-to-moderate diarrhea and associated general physical discomfort. It supports the reduction of stool frequency and liquidity, and contributes to improved comfort during periods of heightened symptoms. The preparation is applicable within settings that involve acute or disruptive symptom patterns, commonly used in situations involving episodic or fluctuating manifestations. It is relevant in situations where symptoms interfere with daily functioning, providing support that helps ease the overall symptom burden and assists with maintaining functional stability.

“This preparation is helpful in situations where symptoms create noticeable functional strain.”

Quick Fact: Relief for Acute Diarrhea and Abdominal Discomfort

Therapeutic Focus Symptom Category Benefit Category
Main Indication Diarrhea, Upset Stomach Symptomatic Relief, Improved Comfort
Context of Use Acute, Non-Specific Episodes Supports Functional Stability
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Eligibility and Restrictions for Use

Eligibility Map: Who can and cannot use Boots Kaolin & Morphine Mixture — Official Regulatory Information

Populations for whom use is allowed (as stated in label):

  • Adults and Children over 12 years

Populations for whom use is not recommended (if applicable):

  • Children under 12 years (Use is explicitly not recommended)

Populations for whom use is contraindicated:

  • Patients with intestinal obstruction or obstructive airways disease.
  • Individuals with acute hepatic disease, acute alcoholism, or known morphine sensitivity.
  • Patients with respiratory depression, head injuries, coma, convulsive disorders, or raised intracranial pressure.
  • Patients with certain metabolic conditions, including metabolic alkalosis or hypocalcaemia, due to the excipient content.

Condition-specific eligibility rules (Use with Caution):

  • Use requires caution in the elderly and in patients with renal impairment (kidney problems) or cirrhosis of the liver.
  • Caution is also advised for patients with congestive heart failure or hypertension.

Pregnancy and lactation eligibility status (if explicitly documented):

  • Pregnancy: Should not be used unless a doctor has explicitly directed it.
  • Lactation (Breastfeeding): Patient is advised to ask a doctor or pharmacist for advice before use.

Connection to the overall eligibility profile: Official regulatory documents define who can and cannot use this medicine through a set of absolute contraindications linked to the morphine and excipient components, prohibiting use in populations with severe respiratory, CNS, or acute liver disease. The label also sets a strict minimum age limit of 12 years and mandates caution for populations with chronic organ impairment or geriatric status.

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What should I know about interactions with other medicines?

Interaction Map: Interactions with other medicines and products — official regulatory information for Boots Kaolin & Morphine Mixture


Interaction Scope

Category Official Regulatory Documentation Statement
Medicinal product categories with documented interactions Monoamine Oxidase Inhibitors (MAOIs), Sedative medicines (e.g., Benzodiazepines, Hypnotics), Other Central Nervous System (CNS) depressants, Sedating Antihistamines, Tricyclic Antidepressants, Antipsychotic medicines, Orally administered drugs subject to adsorption/pH effects.
Specific interacting medicines (if explicitly listed) Cimetidine, Sodium Oxybate, Ciprofloxacin, Aspirin, Tetracycline, Chloroquine, Hydroxychloroquine.
Mechanistic basis of interactions (only if stated in label) Additive CNS depressant effect (Pharmacodynamic interaction); Reduced absorption of other oral medicines (Adsorbent/pH effect, Pharmacokinetic interaction); Decreased metabolism of the opioid component (Pharmacokinetic interaction).
Timing-based interaction rules (if applicable) The combination is strictly prohibited (contraindicated) within 14 days of stopping MAOI treatment. Separation of administration time is an implied condition for other orally administered drugs due to the documented risk of reduced absorption.
Population-specific interaction notes (if applicable) The regulatory documentation does not explicitly detail mechanism-specific interaction severity in specific populations.
Interaction-related restrictions Formal contraindication with MAOIs. Co-administration should be avoided with Sodium Oxybate. Co-administration with Alcohol and Hot Drinks is prohibited.

Resulting Interaction Structure

Official Interaction Statements:

  • Co-administration with Monoamine Oxidase Inhibitors (MAOIs) is a formal contraindication established in the regulatory documentation, requiring that the mixture must not be given concurrently or within 14 days of discontinuing MAOI treatment.
  • The opioid component has an officially documented additive CNS depressant effect when combined with sedative medicines (e.g., benzodiazepines) and other CNS depressants, which increases the documented risk of profound sedation, respiratory depression, coma, and death.
  • The physical adsorbent properties of Kaolin and the antacid properties of the sodium component may reduce or delay the absorption of other orally administered drugs, including Aspirin and Tetracycline, a recognized pharmacokinetic interaction.
  • This reduced absorption specifically applies to medicines such as Ciprofloxacin, where co-administration is noted to result in a decreased plasma concentration of the antibiotic.
  • The co-administration of Cimetidine is officially documented to lead to higher plasma concentrations of morphine due to decreased metabolism of the opioid component.
  • The label includes restrictions prohibiting co-administration with Alcohol (due to enhanced sedative and hypotensive effect) and Hot Drinks, and states that use with Sodium Oxybate should be avoided.

Connection to the Overall Interaction Profile (2–4 sentences):

The regulatory documents define the product's interaction structure based on two primary sources of risk: the additive pharmacodynamic effects of the opioid component with other CNS depressants, and the physical pharmacokinetic interference caused by the adsorbent and antacid components. This structure outlines mandatory prohibitions, such as the contraindication with MAOIs, and explains that the absorption of most other orally administered drugs is subject to reduced exposure due to the formulation's physical characteristics. Official labeling identifies specific interacting substances, including Cimetidine and Ciprofloxacin, and prohibits the co-administration of alcohol and hot drinks.

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Mechanism of Action

The mixture's function is exerted through two distinct yet complementary mechanisms: neuro-modulation and physical adsorption, which influence intestinal dynamics.


Peripheral Control of Gut Motility via mu-Opioid Receptors

The Morphine component acts as an agonist on mu-opioid receptors (mu-ORs) located primarily within the Enteric Nervous System (ENS) of the gut wall. Activation of these receptors inhibits the release of excitatory neurotransmitters like acetylcholine, thereby suppressing the frequency and strength of propulsive peristaltic contractions. This suppression increases intestinal transit time, which supports passive reabsorption of water and electrolytes.


Physical Adsorption and Fluid Management in the Lumen

The Kaolin component, a physical adsorbent, utilizes its vast surface area to bind (adsorb) excess free water, irritants, and certain unabsorbed molecules directly within the intestinal lumen. This non-systemic, mechanical action reduces the fluidity of the contents and simultaneously reduces the concentration of substances capable of chemical or mechanical irritation to the mucosal lining. The synergy of slowing the transit (Morphine) while increasing the bulk (Kaolin) facilitates the physiological conditions for fluid reabsorption and increased content density.

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Dosage and Administration Information

How to Use Boots Kaolin & Morphine Mixture

This section outlines the general principles of administration and dosing for Kaolin and Morphine Mixture BP.


Administration and Standard Dosing

Kaolin and Morphine Mixture is an oral medication, meaning it is taken by mouth as a conventional liquid suspension. The dose should be measured accurately using a 5 ml spoon, and the bottle must be shaken thoroughly prior to administration to ensure the ingredients are evenly mixed.

For adults and adolescents aged 12 years and over, the standard single dose is 10 ml (equivalent to two 5 ml spoonfuls). This dose may be repeated up to 3 times daily or as directed by a healthcare professional.

Administration Feature Labeled Instruction
Route Oral (Liquid Suspension)
Single Adult Dose 10 ml (Two 5 ml spoonfuls)
Maximum Frequency Up to 3 times daily

Usage Constraints and Adjustments

The preparation is not intended for chronic administration. The repeated use of the morphine-containing mixture carries a risk of leading to Opioid Use Disorder (OUD), thereby establishing a formal constraint on long-term usage. The duration of use is generally restricted to the short, acute period of symptomatic need.

Specific administration rules apply to certain populations:

  • Pediatric Use: The mixture is not recommended for children under 12 years of age.
  • Older or Debilitated Adults: Use requires care, and the administered dose should be reduced from the standard adult amount.

These instructions define a standardized protocol for use based on prescribed volume, maximum frequency, required preparation steps, and explicit demographic-based dose modification.

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Recent Clinical Evidence

Research Evidence: Overview of Studies

Mechanism of Action and Formulation

Kaolin is an adsorbent agent that functions within the gastrointestinal (GI) tract. Research indicates that kaolin may act by binding to certain substances in the gut, which can contribute to the consistency of feces.

Morphine is an opioid agonist that affects the central nervous system (CNS) to alter pain perception. In low doses, morphine's action on the gut wall can affect motility (the movement of food through the GI tract). Research examining this effect is distinct from studies on its use for pain relief.

Clinical Study Overview

Clinical data on the combination product, Kaolin and Morphine Mixture, primarily stems from historical pharmacopoeial preparations and small-scale trials focusing on symptomatic relief in non-severe cases of diarrhea. Modern regulatory reviews focus on the safety profile and the established historical use of the individual components.

Component Primary Investigated Action in Formulation
Kaolin Adsorption in the gastrointestinal tract
Morphine Effect on intestinal motility and fluid balance

Key Research Findings

Kaolin: Studies exploring kaolin's adsorbent capacity demonstrate that it is largely unabsorbed by the body and operates locally within the gut lumen. Its effectiveness is based on its physical properties as a demulcent and adsorbent.

Morphine: Research exploring the effects of low-dose morphine on the GI tract suggests an impact on intestinal transit time. Reported effects from small studies include a potential decrease in the frequency of bowel movements compared to baseline observation periods.

Combined Formulation: Formal, large-scale randomized controlled trials (RCTs) comparing the specific Kaolin and Morphine Mixture to modern anti-diarrheal agents are limited. Evidence supporting its traditional use relies heavily on the established pharmacological actions of kaolin and the effects of low-dose morphine on GI function.

Key Studies & References

  1. Morphine
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Frequently Asked Questions (FAQ)

Common questions about Boots Kaolin & Morphine Mixture (FAQ)


Q: How quickly does Boots Kaolin & Morphine Mixture usually start to work?

Official information regarding the exact time to onset of action for this specific combination product is generally not specified in regulatory documents. However, pharmacological texts related to the immediate-release form of the opioid component indicate that its action may typically begin between 15 and 60 minutes after oral administration.


Q: How long do the effects of the mixture typically last?

Official regulatory texts for the mixture do not provide a specific duration of effect. Based on related pharmacological information, the duration of action for the immediate-release opioid component is typically described in related texts as lasting between 4 and 6 hours.


Q: Is this mixture used for treating any kind of diarrhea?

The official documentation indicates that the mixture is for the symptomatic relief of upset stomach and instances of mild diarrhea. It is important to know that its use is formally contraindicated (should not be used) in acute diarrhoeal diseases that are caused by specific infectious agents, such as certain bacteria.


Q: Is it common to feel drowsy after taking this medicine?

Drowsiness is listed in the official safety documentation as an officially documented adverse reaction associated with the mixture. However, regulatory documents often classify the frequency of occurrence (how common a reaction is) for many side effects as 'not known,' meaning a reliable occurrence rate cannot be estimated from the available data.


Q: Can I drive a car if I have recently taken this mixture?

Official warnings state that the medicine can cause side effects such as drowsiness and dizziness, which can impair a person's ability to drive. Regulatory guidance advises that individuals should not drive or operate machinery if they are affected by these symptoms.


Q: What are the official guidelines about using this mixture during pregnancy?

The official regulatory advice is that the mixture should not be used during pregnancy unless a doctor has explicitly directed it. Regulatory documents note that the prolonged use of opioids during pregnancy is associated with a risk of physical dependence in the newborn.


Q: Can I take this mixture if I'm taking anxiety medication?

The official interaction map includes warnings about co-administration with sedative medicines, which often include medications prescribed for anxiety, and other Central Nervous System (CNS) depressants. This combination carries a documented risk of severe sedation and respiratory depression.


Q: What if the patient is elderly and frail; is this mixture still suitable?

Official regulatory texts note that special care is formally required when administering the mixture to older or debilitated patients. For these populations, regulatory advice specifies that the dose administered should be reduced from the standard adult amount.


Q: What is the main regulatory status of this mixture in the UK?

While the core drug texts refer to it as a standard preparation, it is classified in the UK as a Pharmacy (P) medicine. This legal classification means it is only available directly from a pharmacy and must be supplied under the supervision of a pharmacist.


Q: Does the mixture have any effect on blood pressure?

Official documents describe that conditions like hypertension (high blood pressure) require caution for use. Additionally, some excipients in the mixture can affect bodily salts and acids, which are known to influence blood pressure.


Q: Can Boots Kaolin & Morphine Mixture be taken for stomach cramps?

The regulatory documents state that the general purpose of the mixture is to provide symptomatic relief for the discomfort associated with an upset stomach and instances of mild-to-moderate diarrhea. It is not specifically indicated for the sole treatment of stomach cramps.


Q: Is Boots Kaolin & Morphine Mixture the same as other products containing kaolin?

This mixture is a specific combination medicine containing both the adsorbent Kaolin and the active opioid Morphine Hydrochloride. Other products that contain only kaolin would not provide the same dual mechanism of action because they lack the opioid component that affects gut movement.


Q: Is there a risk of becoming dependent on Boots Kaolin & Morphine Mixture?

Yes, official regulatory texts include a clear warning that repeated use of the morphine-containing mixture carries a risk of leading to Drug Dependence and Opioid Use Disorder (OUD). This warning establishes a formal constraint on using the medicine for long periods.


Q: What happens if a dose of the mixture is forgotten?

Regulatory guidance for intermittent opioid products generally advises that a dose may be taken as soon as it is remembered, unless it is almost time for the next scheduled dose. Regulatory instructions caution that two doses should never be taken at the same time to compensate for a missed dose.


Q: Is it possible to have an allergic reaction to the ingredients?

Yes, the official safety documents list the potential for Hypersensitivity Reactions and a Rash as documented adverse reactions. Additionally, individuals with a known morphine sensitivity are listed as being formally contraindicated (should not use the medicine).


Q: Does this mixture affect the effectiveness of the contraceptive pill?

The official interaction map does not explicitly list hormonal contraceptives. However, the Kaolin component acts as an adsorbent, which may reduce or delay the absorption of other oral medicines, including the contraceptive pill. This is due to the potential for the Kaolin component to reduce or delay the absorption of other orally administered drugs.


Q: Why are people told to take the mixture after a bowel movement?

The official regulatory texts do not specify this instruction in their administration section. Taking the dose after a loose bowel movement is a common practice intended to help synchronize the medicine's action with the continuation of symptoms.


Q: Can this mixture be used for traveler's diarrhea?

The regulatory documents state the purpose is the symptomatic relief of mild-to-moderate diarrhea. However, it is specifically contraindicated (should not be used) in acute diarrhoeal diseases caused by certain infectious agents, which can often be the cause of traveler's diarrhea.


Q: What is the purpose of the sediment sometimes seen in the bottle?

The mixture is manufactured as a liquid suspension, and the presence of sediment is normal for this pharmaceutical form. This is why the administration instructions mandate that the bottle must be shaken thoroughly prior to use to ensure all ingredients are evenly mixed.


Q: How do I know if the mixture is still good to use?

Official guidelines state the medicine should not be used after the labeled expiry date. It must also be stored correctly below 25 C and is not permitted to be frozen. Any major change in color, smell, or consistency beyond the normal sediment may indicate it is no longer suitable for use.


Q: Does Boots Kaolin & Morphine Mixture interact with common pain relievers like paracetamol?

The official interaction map for the mixture does not list paracetamol (acetaminophen) specifically. However, regulatory guidance for the morphine component confirms that paracetamol is generally considered to be acceptable for concurrent use with morphine.


Q: Can this medicine be used alongside probiotic supplements?

Official documents do not specifically mention probiotic supplements. However, the Kaolin component acts as an adsorbent, which may reduce or delay the absorption of other orally administered substances, including supplements, if they are taken at the same time.


Q: What should be done if too much of the mixture is accidentally taken?

In cases of accidental overdose, the official documents identify symptoms that can include severe central nervous system depression, such as slowed breathing and extreme drowsiness. Regulatory guidance for opioid overdose stresses the need to seek emergency medical help immediately.


Q: Does this mixture have any known effects on alertness?

Yes, the regulatory texts explicitly list side effects such as drowsiness and dizziness. These are described as impairing overall mental and physical alertness, and for this reason, warnings are issued regarding driving or using machinery.

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How should Boots Kaolin & Morphine Mixture be stored and disposed of?

Storage and Disposal Requirements

The storage and disposal of Boots Kaolin & Morphine Mixture are governed by specific regulatory requirements to ensure product integrity and public safety, primarily due to its content of Morphine, a controlled substance.

Storage Category Official Regulatory Requirement
Temperature Store below 25 C and do not freeze or refrigerate.
Protection Keep out of the sight and reach of children (mandatory).
Integrity Do not use the medicine after the labeled expiry date.

Disposal instructions state that the medicine should not be disposed of via wastewater or household waste. Any unused or expired product must be returned to a pharmacist for proper disposal, ensuring compliance with pharmaceutical waste procedures.

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

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