Mil-par

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Mil-par

Method of action: Laxative

Treatment option: Hemorrhoids, Constipation, Proctitis

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 Mil-par

Property Description
Active ingredient Magnesium Hydroxide, Paraffin Liquid
Form Oral Suspension (Liquid)
Pharmacological class Antacid-Laxative Combination
Common use Relief of constipation and gastric acidity
Origin Derived formulation (Mineral and Petroleum-derived)

What Type of Medicine is Mil-par?

Mil-par is fundamentally an Oral Suspension classified as an Antacid-Laxative Combination, establishing it as a distinct combination medicine that addresses two separate gastrointestinal needs. This specialized formulation, administered orally as a smooth, non-gritty viscous liquid, differentiates it from single-agent preparations by combining therapeutic actions. The co-formulation is designed for providing relief in scenarios where patients experience both irregularity and minor acid-related discomfort. This means that, based on its classification, the preparation is designed to offer a multifaceted approach to common digestive discomforts.

Composition: Magnesium Hydroxide and Paraffin Liquid

The medicine contains two principal active ingredients: Magnesium Hydroxide and Paraffin Liquid (mineral oil). Magnesium Hydroxide is an inorganic compound that primarily functions as an osmotic agent, drawing water into the intestinal lumen. The second component, Paraffin Liquid, is a highly refined substance derived from petroleum that acts as an intestinal lubricant. The product is therefore a derived formulation that synthesizes the distinct, yet complementary, properties of these two components into a stable suspension, a specific dosage form often preferred by individuals who have difficulty swallowing solid medication.

General Purpose and Benefit of the Dual Action

The general purpose of the dual action is to manage two primary forms of digestive discomfort through complementary physiological actions. The formulation is intended to promote the softening and easier passage of intestinal contents, fulfilling its primary laxative purpose. Concurrently, the Magnesium Hydroxide component provides a secondary benefit by delivering neutralization of stomach acid, which helps alleviate minor gastric irritation. Such combination agents are used to achieve both hydration and lubrication. This provides a focused, high-level benefit by consolidating two frequently required digestive supports into one combination medicine.

Regulatory References

  1. Liquid Paraffin (SID 7979779)
  2. PubMed Central Article (PMC8632616)

What side effects are possible with Mil-par?

The officially documented safety profile for Mil-par (Magnesium Hydroxide / Paraffin Liquid) is structured by the effects of its two active components, focusing on gastrointestinal actions and specific systemic risks as detailed in regulatory documents.

Official Adverse Reaction Classification

Adverse reactions are primarily associated with the digestive system and are classified by frequency in official labels.

  • Common / Frequency Not Known: The most frequently reported effects are related to the laxative action, including diarrhoea and abdominal discomfort (colic).
  • Very Rare: A serious systemic event, Hypermagnesaemia (magnesium accumulation), is documented as very rare, particularly when the medicine is used for prolonged periods.

The system-organ classes involved include Gastrointestinal disorders and Metabolism and nutrition disorders.

Serious Adverse Reactions and Safety Constraints

Regulatory documents highlight two key serious safety concerns:

  1. Hypermagnesaemia: This systemic toxicity risk is explicitly linked to prolonged administration and is significantly higher in patients with renal impairment (kidney problems).
  2. Lipoid Pneumonia: A serious pulmonary risk is associated with the aspiration (inhalation) of the Paraffin Liquid component, necessitating caution in populations with swallowing difficulties.

The official labeling imposes specific safety constraints. The medicine is contraindicated in cases of intestinal obstruction or severe renal failure. Furthermore, the safety profile notes that prolonged use may cause reduced absorption of certain other orally administered medications and fat-soluble vitamins.

Overdose and Emergency Response

Overdose and When to Seek Help

The most serious risk associated with a Mil-par overdose is severe hepatotoxicity, which is life-threatening and may lead to acute liver failure. This is the primary concern described in regulatory documentation for overdose situations.

Clinical Manifestations of Overdose

The initial symptoms following an overdose can be general and nonspecific, often presenting as nausea, vomiting, or abdominal pain. A crucial factor in this type of overdose is the delayed symptom onset, meaning that significant, irreversible liver damage can occur without clear or immediate outward signs of distress.

Overdose, whether from a single large ingestion or repeated use of supratherapeutic amounts, carries the risk of requiring a liver transplant due to the severity of the damage, or it can be fatal.

Required Emergency Action

Immediate medical attention is mandatory upon suspected overdose. Because of the serious risks and the potential for a delayed onset of symptoms, individuals must not wait for visible signs of illness before seeking help.

Regulatory agencies instruct that if an overdose is suspected, you must contact a poison control center, emergency medical services, or an emergency department immediately. Prompt action is critical for receiving necessary treatment and preventing severe, irreversible consequences.

Therapeutic Uses of Mil-par

What Mil-par Treats: Main Uses and Benefits

The therapeutic uses of this medicine are relevant for managing symptom clusters related to physical discomfort in the gastrointestinal tract. Its components are generally relevant for managing both occasional constipation and symptoms of acid indigestion.

Mil-par is commonly used to help with symptom clusters associated with acute or episodic changes, including simple constipation and minor acid-related digestive symptoms, such as gastric irritation and mild to moderate heartburn. This medicine may be part of symptomatic management when infrequent bowel movements and minor acid upset occur together, helping to ease the overall symptom burden.

“Applied across domains where additional symptomatic support is needed, this medicine supports the patient during difficult episodes by easing distress.”

This medicine helps improve day-to-day comfort and assists with maintaining functional stability during symptomatic phases.


Quick Fact: Relief for Constipation and Acid Symptoms

This product is relevant for managing co-occurring symptoms, including infrequent bowel movements and acid indigestion.

Regulatory References

  1. NIH MedlinePlus overview

Eligibility and Restrictions for Use

Eligibility and Contraindications

Mil-par is officially approved for use by adults and children 12 years of age and over. Regulatory labeling defines several strict criteria for non-eligibility and restricted use, reflecting the combination of a laxative and a magnesium-based antacid.

Absolute Contraindications: The medicine is strictly contraindicated in patients with:

  • Severe Renal Impairment or Kidney Failure due to the high risk of magnesium accumulation and toxicity.
  • Intestinal Obstruction, Faecal Impaction, or acute abdominal conditions such as suspected appendicitis, undiagnosed abdominal pain, or persistent vomiting.
  • Myocardial Damage or Heart Block, or known Hypersensitivity to any component.

Restricted and Conditional Use:

  • Age Restriction: Use in children under 12 years is not recommended without medical consultation.
  • Physiological States: Use during pregnancy and lactation is restricted and requires explicit medical supervision.
  • Geriatric Use: Older adults must immediately discontinue use if diarrhoea occurs due to the risk of dehydration.
  • Duration Limit: The medicine should not be taken for longer than one week without the direction of a healthcare professional.

What should I know about interactions with other medicines?

The interaction profile of Mil-par is officially documented to involve two primary pharmacokinetic effects and a single pharmacodynamic concern. The Magnesium Hydroxide component can significantly reduce the systemic exposure of many concurrently administered oral medicines due to cation binding and alteration of gastric pH. This absorption interference is classified as clinically significant and applies to drug categories such as Tetracyclines, Quinolones, and oral Bisphosphonate Derivatives. A severe restriction is noted for co-administration with agents like Eltrombopag.

To mitigate this effect, regulatory documents mandate strict time separation between doses. Other oral medicines should generally be administered at least two to three hours apart from Mil-par. For specific high-risk agents, such as Eltrombopag, a mandatory four-hour separation is required, as written in the regulatory prescribing information. The Paraffin Liquid component introduces a secondary interaction risk: prolonged use may reduce the absorption of fat-soluble vitamins (A, D, E, K) due to its lipophilic nature.

Additionally, a pharmacodynamic interaction is noted with Diuretics, which increases the documented risk of dehydration. A population-specific consideration exists for patients with renal impairment due to the reduced clearance of magnesium, which heightens the risk of systemic effects.

Mechanism of Action

The action of this preparation is based on a dual peripheral mechanism, combining the principles of osmosis and physical lubrication within the gastrointestinal tract, alongside a fast-acting chemical neutralization in the stomach.

Osmotic Modulation of Intestinal Water Balance

This domain describes how Magnesium Hydroxide acts as a non-absorbable salt on the aqueous gradient in the gut lumen. The osmotic force draws water into the intestine, increasing the volume and hydration of the contents. This fluid influx creates mechanical pressure, which indirectly leads to the mechanical stimulation of peristaltic movement.

️ Physical Lubrication and Frictional Resistance Control

This mechanism involves Paraffin Liquid, which exerts a purely physical effect on the intestinal mucosa and contents. It forms a protective, hydrophobic film that establishes a boundary that diminishes mechanical drag and frictional resistance along the bowel wall. This layer also functions as a physical barrier that retards water reabsorption from the fecal material, thereby preserving the soft consistency provided by the osmotic mechanism.

️ Rapid Gastric pH Neutralization

This chemical mechanism, also carried out by Magnesium Hydroxide, targets existing Hydrochloric Acid ( HCl) in the stomach. The compound rapidly consumes HCl through a direct neutralization reaction, causing a swift rise in local pH. This shift in acidity immediately inactivates the proteolytic enzyme pepsin, which only functions in a highly acidic environment, resulting in the loss of acid-mediated chemical activity against the mucosal surface.

Dosage and Administration Information

Mil-par is a dual-component Oral Suspension that is administered exclusively by the oral route. The protocol for its use encompasses dose volume, schedule, and duration. The product is intended for once-daily administration and should be taken either before breakfast or at bedtime to optimize the timing of its effect. It is recommended that the suspension be used for temporary relief of occasional episodes only, as prolonged continuous use is not advised.

The required dose is measured volumetrically. The standard dose for adults, including older adults, falls within the range of 15 mL to 30 mL (equivalent to one to two tablespoonsful). To facilitate easier intake, the measured volume may be mixed with half a glass of milk or water prior to consumption.

Dosing for Specific Age Groups

Age Group Standard Once-Daily Dose Key Timing
Adults (Including Elderly) 15 mL to 30 mL Before breakfast or at bedtime
Children (7 Years and Over) 7.5 mL to 15 mL At bedtime
Children (2 to 7 Years) 5 mL to 10 mL At bedtime

Pediatric dosing is defined by distinct age bands, and the product is restricted from administration to children under two years of age. Furthermore, a procedural constraint exists, requiring special care during administration to patients with swallowing difficulties.

Recent Clinical Evidence

Research Evidence / Overview of Studies for Mil-par

Evidence for Use in Occasional Constipation

Research examining this formulation in conditions involving periods of heightened symptoms of constipation relies on studies of the combination and its individual components, Magnesium Hydroxide and Liquid Paraffin. Studies was evaluated in this indication include short-term randomized controlled trials (RCTs), systematic reviews, and observational research. These studies monitored outcomes reflecting daily functioning or activity level, such as the patient-reported frequency of bowel movements per week and the measured stool consistency. Findings from the research describe patterns observed in the studies where various formulations containing these ingredients was studied for short-term symptom changes. Due to differences in formulations and patient groups, the findings were sometimes mixed, which reflects heterogeneity within the broader evidence landscape.

Evidence for Antacid Action and Acid Indigestion Relief

Research examining minor acid-related discomfort often focuses on the Magnesium Hydroxide component. Studies monitored how this ingredient affects outcomes linked to inflammatory or irritative states in the stomach, exploring objective measurements, like the change in gastric pH (acidity levels), and patient-reported outcomes describing perceived discomfort, such as heartburn severity. The research has data showing patterns related to the component's effect on measured changes in gastric acidity in the short-term. However, comparative evidence specifically isolating the effect of this dual combination when monitoring both acid and constipation outcomes is limited.

What Research Gaps and Uncertainties Remain

A key limitation is that comparative evidence is lacking for the specific dual-action formulation when measured against the latest single-agent treatments. The evidence quality varies across studies, with older trials sometimes having sample sizes that were modest or less rigorous designs compared to modern standards. Dedicated research exploring the effect of the two components working together is still limited. These research findings describe group patterns, not personal outcomes, and contribute to the broader evidence landscape of short-term relief patterns, but certainty remains low for long-term predictability.

Key Studies & References

  1. Paraffin Liquid (Mineral Oil): Substance Summary
  2. A combined approach to the treatment of constipation: lubrication and hydration—A review of the literature
  3. Magnesium Hydroxide and Mineral Oil Oral Suspension: Drug Information (reflects general uses of components)

Frequently Asked Questions (FAQ)

Common questions about Mil-par (FAQ)


Q: Does Mil-par require special monitoring while taking it?

Official labeling notes that special care should be taken for patients with swallowing difficulties due to the risk of aspirating the liquid paraffin component. The labeling also includes a constraint that older adults should discontinue use if they experience diarrhoea. Routine monitoring, such as regular blood tests, is not typically specified for the general healthy population.


Q: What are the main risks associated with Mil-par, according to the FDA?

Official regulatory documents generally highlight two primary risks associated with this type of combination medicine. The risk of Hypermagnesaemia (magnesium accumulation) is noted, particularly where kidney function (renal impairment) is already compromised. There is also a pulmonary risk known as Lipoid Pneumonia if the liquid component is accidentally inhaled (aspirated).


Q: Does Mil-par interact with common over-the-counter pain relievers?

Official prescribing information indicates that the magnesium hydroxide component can interact with other oral medicines by affecting how the body absorbs them. This includes common over-the-counter drugs, such as certain pain relievers like NSAIDs, whose absorption may be increased. Regulatory documents typically advise time separation between doses of Mil-par and other oral medicines.


Q: What is the official chemical name of Mil-par?

Mil-par is the brand name for a combination product that contains two principal active ingredients. These are Magnesium Hydroxide and Paraffin Liquid, which is also commonly referred to as mineral oil. The product itself is not a single chemical entity.


Q: Can I use Mil-par if I am already taking blood pressure medicine?

Official labeling notes a pharmacodynamic interaction with Diuretics, which are often used to treat high blood pressure, as this combination increases the documented risk of dehydration. Due to potential absorption issues with the magnesium component, it is advisable to consult the prescribing information for potential interactions with other specific classes of blood pressure medicine.


Q: What is the recommended storage condition for Mil-par tablets?

Mil-par is supplied as an Oral Suspension, which is a liquid medicine, not a tablet. The official storage rules require the suspension to be kept below 25 C and protected from moisture and light. To help ensure efficacy, the medicine should be used within 28 days of opening the bottle.


Q: Does Mil-par stay in your system for a long time?

According to regulatory pharmacology information, the liquid paraffin component is not absorbed into the body. The other active ingredient, Magnesium Hydroxide, has minimal systemic absorption when the kidneys are functioning normally and is mainly passed out of the body. Both components are primarily designed for action within the digestive tract.


Q: Is it true that Mil-par can cause a dry mouth?

Dry mouth is not listed as a common, uncommon, or rare side effect in the official regulatory product labeling for Mil-par. The most frequently reported adverse effects associated with this medicine are related to the digestive system, such as diarrhoea and abdominal discomfort (colic).


Q: What is the usual time frame before Mil-par is expected to start working?

Regulatory product information indicates that the dual-action formulation is designed to provide relief. The antacid component (Magnesium Hydroxide) is known to have a rapid onset of effect for gastric discomfort. For constipation relief, the combined osmotic and lubricating action can typically start working within 30 minutes to 6 hours after administration.


Q: Are there any specific foods or drinks to be cautious about while using Mil-par?

While no specific foods are listed as strictly forbidden, the official labeling warns that the product's prolonged use may reduce the body's ability to absorb fat-soluble vitamins (A, D, E, and K). The labeling advises caution regarding all oral medicines, and time separation is typically documented to prevent absorption interference.


Q: Is there a generic version of Mil-par available?

While Mil-par is a brand name, its two active ingredients—Magnesium Hydroxide and Paraffin Liquid—are compounds that are widely available. Both components are commonly found in single-agent over-the-counter (OTC) laxatives and antacids, including generic options.


Q: Are there different strengths of Mil-par available?

The medicine is typically manufactured and supplied as a single, fixed concentration in the oral suspension (liquid) form. Dosage adjustments for different ages or needs are achieved by changing the volume of liquid administered, rather than changing the strength of the medicine itself.


Q: Is Mil-par a controlled substance?

Based on official regulatory classification by major health agencies, Mil-par is not listed as a controlled substance. It is categorized as an Antacid-Laxative Combination.


Q: What happens if I miss a dose of Mil-par?

Official patient information for this type of medication generally advises skipping the dose if it is almost time for the next scheduled dose. Regulatory patient information typically states to avoid taking extra medicine or doubling the dose to make up for a missed dose.


Q: Is Mil-par safe for people with liver issues?

The primary safety concern noted in regulatory documents is related to kidney function (renal impairment). Official data on the active components do not commonly raise concerns about liver toxicity or injury.


Q: Can taking Mil-par affect the results of lab tests?

There is no explicit common warning in official regulatory documents stating that Mil-par directly interferes with the results of routine diagnostic laboratory tests. Its known mechanism is primarily to interfere with the absorption of certain concurrently administered medicines, not to skew test results.


Q: Are there restrictions on driving or operating machinery while on Mil-par?

The official labeling does not include specific warnings restricting the ability to drive or operate machinery. This is because the medicine is generally not associated with central nervous system effects like sedation or drowsiness, as its actions are confined to the digestive system.


Q: Is Mil-par a medication that needs to be tapered off?

Mil-par is intended for temporary relief of occasional symptoms, with a maximum recommended duration of one week without professional direction. Official instructions typically do not specify a tapering schedule when discontinuing use, consistent with its temporary purpose.


Q: Is Mil-par known to cause weight changes?

Weight change is not listed as a known or common adverse reaction in the authoritative regulatory labeling for Mil-par.


Q: Can Mil-par interact with herbal supplements?

Regulatory documents advise that Mil-par may interact with some herbal products. This is because the magnesium component can reduce the body's absorption of other orally administered compounds, potentially including those found in herbal supplements.


Q: Does Mil-par affect sleep patterns?

Changes to sleep patterns, such as insomnia or drowsiness, are not listed as an adverse reaction in the authoritative regulatory labeling for Mil-par.


Q: Are there known interactions between Mil-par and alcohol?

The official regulatory labeling for Mil-par does not contain a specific warning or contraindication against the concurrent use of alcohol.


Q: Is it normal to feel a bit nauseous when first starting Mil-par?

Nausea is not typically listed as a common adverse reaction in the authoritative regulatory labeling for Mil-par. The most frequently reported effects are related to its laxative action, such as diarrhoea and abdominal discomfort.


Q: Does Mil-par have a Boxed Warning (Black Box)?

Mil-par and its components generally do not carry a Boxed Warning, often referred to as a Black Box Warning, in the regulatory labeling. However, serious risks such as hypermagnesaemia and lipoid pneumonia are covered in the standard Warnings and Precautions section.


Q: Where can I find the official patient information leaflet for Mil-par?

Official patient information, such as the Patient Information Leaflet or Medication Guide, is made available by regulatory bodies. This authoritative document can typically be found through government drug databases, such as the FDA's DailyMed database or the regulatory body for your specific country.


Q: How often do people report feeling dizzy on Mil-par?

Dizziness is not listed as a common or frequently reported adverse reaction in the authoritative regulatory labeling for Mil-par. The documented adverse reactions are primarily confined to the digestive system.

How should Mil-par be stored and disposed of?

How to Store and Dispose of Mil-par?

The storage and disposal of Mil-par (Magnesium hydroxide and Liquid paraffin oral suspension) must adhere strictly to the conditions specified in the official regulatory labeling.


Storage Requirements

  • Temperature: The medicine must not be stored above 25 C.
  • Protection: The product should be protected from light and moisture.
  • Child Safety: It must be kept strictly out of the reach and sight of children.

Stability and Shelf-Life

To ensure efficacy, the medicine must be used within 28 days of opening the bottle. The medicine must not be used at all after the expiry date printed on the container.


Official Disposal Rules

Expired or unused Mil-par should not be thrown away in normal household waste. Instead, any unused medicine must be returned to a pharmacist for safe and proper disposal as pharmaceutical waste.

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

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