Peristalid

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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 Peristalid

Property Description
Active Ingredient Lactulose
Form Oral Solution or Syrup (Aqueous Vehicle)
Pharmacological Class Osmotic Laxative
Common Use Bowel Regulation (softening of stool)
Origin Synthetic Disaccharide

Defining Peristalid: A High-Level Classification

Peristalid is a recognized trade name for a medicine whose sole active substance is the non-absorbable synthetic sugar Lactulose. The drug is formally classified as an osmotic laxative, a pharmaceutical category used to manage issues related to infrequent or difficult bowel movements.

This medicine’s effectiveness is recognized; Lactulose is included on lists of essential medicines. This status reflects its therapeutic value for common health concerns globally. Peristalid is positioned as a non-stimulant option, distinguishing its gentle, localized action from the more direct muscular effects of stimulant laxatives.

Composition and Origin: Is Lactulose Natural or Synthetic?

The core active ingredient, Lactulose, is chemically defined as a synthetic disaccharide, a specialized sugar molecule created through a structural rearrangement of lactose. Peristalid is typically administered as an oral solution or syrup, consisting of the active substance dissolved in an aqueous vehicle (a water-based liquid base).

Lactulose is non-absorbable by human digestive enzymes. This structural integrity ensures that the dose passes virtually unchanged into the large intestine. This feature is central to its therapeutic mechanism and establishes its difference from readily absorbed dietary sugars.

General Purpose and Non-Systemic Action

The general purpose of Peristalid is to support natural bowel regulation and the easier passage of contents through the lower digestive tract. The mechanism relies on the non-absorbable substance attracting water into the colon via osmosis, thereby increasing the volume and hydration of the stool.

This localized action means the medicine's activity is confined to the digestive system, providing a physical, gentle means of relief. Osmotic agents like Lactulose are poorly absorbed and pull water into the bowel lumen to produce a laxative effect.

Regulatory References

  1. NIH StatPearls: Lactulose

What side effects are possible with Peristalid?

Possible Side Effects and Safety Information

The safety profile for Peristalid, which contains the active ingredient Lactulose, is primarily characterized by effects related to its localized action within the gastrointestinal tract, as documented in official regulatory labeling. Most adverse reactions are physical and dose-dependent.


Officially Documented Adverse Reactions by Frequency

Adverse reactions are classified according to frequency, consistent with regulatory standards:

  • Very Common (occurring in ge 1 in 10 patients): Diarrhoea.
  • Common (occurring in ge 1 in 100 to < 1 in 10 patients): Flatulence (Gas), Abdominal pain (cramps), Nausea, and Vomiting.
  • Uncommon (occurring in ge 1 in 1,000 to < 1 in 100 patients): Electrolyte imbalance (documented as an investigation finding and linked to persistent diarrhoea).
  • Not Known (frequency cannot be estimated): Hypersensitivity reactions, Rash, Pruritus, and Urticaria (Hives).

Most reported effects are grouped under the Gastrointestinal disorders System-Organ-Class.


Safety Considerations and Restrictions

Regulatory documents include specific safety constraints and population considerations:

  • Time-Related Patterns: Flatulence is a common side effect that may appear during the first few days of treatment and typically lessens. The risk of electrolyte imbalance is officially noted in connection with chronic use of unadjusted high doses causing persistent diarrhoea.
  • Special Populations: The medicine is contraindicated in patients with Galactosaemia and those with a known history of Hypersensitivity to Lactulose. Its use in infants and children is advised only under specialist supervision.
  • Contraindications: Peristalid must not be used in individuals with Gastrointestinal obstruction or those who have or are at risk of a Gastrointestinal tract perforation.

Overdose and Emergency Response

Overdose and when to seek help

The information below outlines the officially documented manifestations and required emergency actions for Peristalid overdose, as stated in government regulatory labeling.

Domain Official Regulatory Statements
Documented Overdose Manifestations The clinical signs of overdosage are expected to be pronounced gastrointestinal symptoms. These include dose-dependent diarrhea and abdominal cramps or pain. Nausea and vomiting are also listed as documented manifestations associated with excessive usage.
Severe Physiological Risks The most significant risk associated with prolonged excessive dosage is the resulting excessive fluid loss and the potential for electrolyte disturbances. Regulatory documents specifically cite the risks of developing hypokalemia (low potassium) and hypernatremia (high sodium).
Mandated Emergency Action The medication must be terminated immediately upon recognition of overdose symptoms. Patients must seek emergency medical attention or contact the national Poison Help line for suspected overdose scenarios.

When Immediate Medical Help is Required

Official labeling specifies that urgent medical care is required if the severe fluid loss from overdose leads to clinical signs of a major electrolyte imbalance. These critical manifestations include irregular heartbeats, severe muscle weakness, or profound confusion. The officially described management is symptomatic and supportive, with the core procedural step being fluid and electrolyte replacement to correct the documented abnormalities. There is no specific antidote listed in the regulatory prescribing information. Specific populations, such as patients being treated for hepatic encephalopathy, carry a documented risk of exacerbation of their condition during an overdose event.

Therapeutic Uses of Peristalid

Quick Facts

  • Primary Therapeutic Domains: Chronic constipation
  • Additional Use: Management of specific liver conditions
  • Goal of Treatment: Promote regular bowel movements and reduce specific toxin levels

Peristalid is a prescription medication that is used to address certain digestive and metabolic conditions. The primary therapeutic domain for this medication is the management of chronic constipation, which involves addressing infrequent bowel movements or difficulty passing stool. It may help manage symptoms related to a lack of regularity.

In addition to its use in chronic constipation, Peristalid may also be utilized in the management of hepatic encephalopathy in adult patients. This condition involves reduced brain function that can occur when the liver is unable to remove specific toxins from the blood. The medication works within the digestive system to support the reduction of these toxins, which can contribute to the overall functional and symptomatic improvement of the patient.

It is important for patients to discuss the potential benefits and risks of this medication with their healthcare provider to determine if it is appropriate for their individual needs.

Regulatory References

  1. NIH MedlinePlus medication overview

Eligibility and Restrictions for Use

Eligibility for Peristalid (Lactulose): Official Regulatory Profile

The eligibility for using Peristalid is strictly defined by regulatory authorities based on a patient's existing health conditions and age. The medicine is contraindicated and must not be used in specific populations to avoid potential complications.

Absolute Contraindications

Use of Peristalid is prohibited in patients with known galactosemia, a severe metabolic condition. It is also prohibited for patients experiencing a gastrointestinal obstruction or who are at risk of a digestive tract perforation. Use is also excluded in cases of known hypersensitivity to the active substance, Lactulose, or to any of the other excipients.

Age and Physiological Restrictions

Peristalid is generally permitted for use in adults and adolescents. Use in children and infants is permitted for constipation only, and is conditional upon strict medical supervision, especially for those under one year of age. The safety and effectiveness of Lactulose for treating hepatic encephalopathy have not been established in the pediatric population (children and adolescents).

Use during pregnancy and breastfeeding is generally permitted, as regulatory bodies note that the medicine's systemic absorption is negligible. Furthermore, patients with renal or hepatic insufficiency typically require no special dosage recommendation.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Peristalid, whose active ingredient is Lactulose, is minimally absorbed into the bloodstream. Therefore, its documented interactions primarily involve pharmacodynamic effects localized to the gastrointestinal tract and impacts on electrolyte balance, as noted in official regulatory labeling.

Pharmacodynamic Interactions and Restrictions

Interacting Substance/Class Official Interaction Description/Restriction
Non-Absorbable Antacids Co-administration may inhibit the desired reduction in colonic pH, potentially decreasing the medicine's efficacy, particularly in the management of specific liver conditions.
Other Laxatives Concomitant use is discouraged during the initial phase of therapy to prevent complications with dose adjustment and mitigate the risk of severe diarrhea and electrolyte imbalance.
Diuretics, Corticosteroids, Amphotericin B These substances increase the documented risk of potassium loss (hypokalemia) due to additive pharmacodynamic effects on electrolytes.
Cardiac Glycosides (e.g., Digoxin) If hypokalemia occurs, it may increase the effect and potential toxicity of co-administered cardiac glycosides.

Procedural and Substance-Related Constraint

Regulatory documents note a theoretical explosion hazard during medical procedures that involve electrocautery (such as proctoscopy or colonoscopy). This hazard is due to the accumulation of hydrogen gas produced by the bacterial fermentation of Lactulose in the colon. No mandatory time-separation rules for administration with other medicines are documented in the official labeling.

Mechanism of Action

How Peristalid Works

Targeting Specific Receptors and Enzymes

Peristalid's mechanism begins at a molecular level, where it selectively engages with defined receptor or enzyme systems within the body's regulatory pathways. This targeted interaction establishes the primary point of action that influences downstream activity. The drug's structure allows it to either block or stimulate activity at a specific biological site.

Modulating Intracellular Signaling Cascades

The initial binding event triggers a chain of command, modulating signal transduction cascades within the cell. Peristalid's influence alters the flow of information along defined neural or humoral pathways, specifically dampening or normalizing the production of key intracellular mediators. The resultant modulation of activity affects downstream signal propagation.

Influencing Physiological System Regulation

By controlling the molecular cascade, Peristalid influences the activity of overactive or dysregulated physiological processes within a targeted system. The drug's engagement exerts a targeted effect on key regulatory networks. This mechanism dictates the resulting effect profile.

Dosage and Administration Information

How to Use Peristalid: Administration Guidelines

Peristalid (Lactulose) is an oral solution/syrup used to ensure appropriate administration. The correct route, dosing, and preparation steps are determined by the specific condition being managed.

Established Administration Routes

Administration is primarily by the Oral route. The Rectal route, utilizing an enema preparation, is reserved for the acute management of severe Hepatic Encephalopathy (impending coma or coma) when oral intake is difficult.

Typical Adult Dosing Regimens

Distinct regimens are defined for each use. Doses are typically expressed in milliliters (mL) or grams (g) of lactulose. Dosing recommendations may vary; typical regimens include:

Indication Initial Dose Maintenance Dose Frequency
Chronic Constipation 15 mL to 45 mL daily Adjusted by response, typically 15 mL to 30 mL daily Once daily or divided
Hepatic Encephalopathy 30 mL to 45 mL per dose Adjusted to produce 2 to 3 soft stools daily 3 to 4 times daily

Preparation and Administration Instructions

For oral administration, the solution may be taken undiluted or mixed with water, fruit juice, or milk to improve palatability. It is advised that the single dose be swallowed immediately.

Patients using Peristalid are generally advised to consume a sufficient amount of fluids daily, such as 1.5 to 2 liters, to support the osmotic action of the medicine. For Hepatic Encephalopathy, the dose is adjusted (titrated) to achieve the therapeutic goal of 2 to 3 soft stools per day.

Recent Clinical Evidence

Research evidence / Overview of studies for Peristalid


Evidence for use in Chronic Constipation

Research into Peristalid (Lactulose) for chronic constipation has primarily involved randomized controlled trials (RCTs) and comprehensive meta-analyses, which are research methods that compare the substance to either a placebo or other laxatives. These studies often focus on adult patients who experience infrequent or difficult bowel movements, which is a condition marked by functional limitations and fluctuating symptoms. Research examined outcomes related to physical discomfort that patients reported.

Studies monitored objective measurements such as weekly stool frequency and used standard scales to track changes in stool consistency. They also applied in studies examining patient-reported experiences of straining or feeling of incomplete emptying. Studies reported patterns of change in weekly bowel movement counts, as monitored by researchers.


Evidence for use in Hepatic Encephalopathy

Peristalid was studied for Hepatic Encephalopathy (HE), a condition where the liver's function is compromised, leading to outcomes related to systemic or functional imbalance. The research base includes a collection of RCTs and systematic reviews, which often compare the substance against other prescribed treatments or standard supportive care. These clinical evaluations primarily focus on adults with advanced liver conditions who are experiencing acute HE episodes or who are at risk of recurrence.

Studies explored changes in mental function, using specialized rating scales that capture the phases of heightened symptom activity associated with HE. Studies monitored measurements related to the clinical assessment scores, which monitored mental function over short treatment intervals. Long-term studies observed how symptoms evolved in populations being studied for the prevention of HE recurrence.


Evidence Gaps and Areas of Uncertainty

The clinical research, while extensive, still contains gaps. One primary area of uncertainty involves the evidence quality varies across studies, with methodological differences in how older trials were designed and executed. Furthermore, follow-up durations were limited in many of the core trials for chronic constipation, meaning long-term effects are not fully established regarding continuous use over many months or years. Subgroup findings are uncertain because results apply only to the populations studied and may not reflect every patient profile.

Key Studies & References

  1. Lactulose: Package Insert / Prescribing Information (FDA/DailyMed)
  2. WHO Model List of Essential Medicines (Relevant for global guidelines/context)

Frequently Asked Questions (FAQ)

Common questions about Peristalid (FAQ)

Q: What is the main reason doctors prescribe Peristalid?

A: Official regulatory documents state that Peristalid is primarily used for two conditions: the treatment of chronic constipation and for managing hepatic encephalopathy, which is a severe complication related to liver disease.

Q: Is Peristalid a type of antibiotic?

A: No. Official classifications describe the substance in Peristalid (lactulose) as an osmotically acting laxative. It works by drawing water into the colon to soften the stool and is not classified as a traditional antibiotic.

Q: How quickly should I expect Peristalid to start working?

A: Because the medicine must travel to the colon and undergo a specific breakdown process to become active, the desired bowel movement may require 24 to 48 hours to occur. Regulatory information advises patients to allow sufficient time for the medicine to take effect.

Q: Is Peristalid considered a controlled substance?

A: No. Regulatory body information, such as the FDA label, does not describe Peristalid as a controlled substance. This classification typically applies to medications with a high potential for abuse or dependence.

Q: What are some of the most commonly reported side effects of Peristalid?

A: The most commonly reported effects are typically experienced when treatment begins and include flatulence (gas), intestinal cramps, nausea, and vomiting. Official sources indicate that these initial discomforts are usually transient (temporary).

Q: Can Peristalid cause changes in mood or sleep?

A: Although not among the most common adverse events, some official adverse reaction reports have included changes in mood, restlessness, and insomnia. This information is based on reports gathered from patient experiences.

Q: Does taking Peristalid require any special diet changes?

A: Official guidance emphasizes consuming sufficient fluids daily to support the medicine's mechanism of action. Due to the presence of small amounts of the sugars galactose and lactose, official information describes the medicine as needing caution for patients with diabetes.

Q: How long does Peristalid usually stay in your system?

A: Peristalid is poorly absorbed from the digestive tract, meaning very little enters the bloodstream. The small amounts that are absorbed are generally excreted in the urine within 24 hours. Its main action is local, occurring in the colon.

Q: Can older adults typically use Peristalid?

A: No special dosage recommendations are specifically detailed for older adults. However, for any patient using the medicine for more than six months, official information advises for regular monitoring of certain electrolytes (salts) in the blood.

Q: What does 'contraindication' mean regarding Peristalid?

A: Contraindication refers to conditions that make the use of a medicine potentially harmful. Official documents list conditions like galactosaemia (a rare inability to process galactose) or the need for a low galactose diet as contraindications for Peristalid.

Q: Have there been a lot of studies or research on Peristalid?

A: Official regulatory documentation references results from various studies, including toxicology and reproduction studies in animals, alongside data gathered from the drug's long history of clinical use to support its safety profile.

Q: Do food or dairy products affect how well Peristalid works?

A: The medicine acts primarily in the colon, not the stomach. Regulatory information states it may be mixed with liquids such as water, milk, or juice for palatability. However, concurrent use of nonabsorbable antacids may inhibit the desired effect.

Q: Is it normal to have mild stomach discomfort when first taking Peristalid?

A: Yes. It is described in official information that effects like flatulence and intestinal cramps may occur, particularly when treatment begins. These mild stomach discomforts are usually transient and may lessen after a short period.

Q: What is the typical age range of people who use Peristalid?

A: While adult use is detailed, some regulatory information states that the safety and effectiveness of the medicine have not been established for use in pediatric patients (children and teenagers). Use is primarily detailed for adults.

Q: Is Peristalid used for short periods or long periods?

A: Peristalid is indicated for chronic constipation, implying it is often used for long-term management. Official sources advise for regular monitoring for patients who use the medicine for more than six months.

Q: What types of diseases or conditions does Peristalid mainly target?

A: Official regulatory documents state that Peristalid is primarily used for two conditions: the treatment of chronic constipation and for managing hepatic encephalopathy, which is a severe complication related to liver disease.

Q: Are the side effects of Peristalid permanent?

A: Common initial effects like flatulence and cramping are described as usually transient. Severe effects are typically associated with excessive dosage and involve reversible issues like loss of fluids and electrolyte imbalance, which should resolve upon dose adjustment.

Q: Does Peristalid affect blood sugar levels?

A: Because Peristalid contains small amounts of the sugars galactose and lactose, official information describes the medicine as needing caution for patients with diabetes to ensure proper blood sugar management.

Q: What are the official warnings about taking Peristalid during pregnancy?

A: Official regulatory information notes that animal reproduction studies have not shown harm to the fetus. However, official guidance indicates the medicine is reserved for use during pregnancy only when clearly needed, reflecting general caution.

Q: Does Peristalid contain lactose or gluten?

A: The medicine is known to contain small amounts of the sugars galactose and lactose as components. Official regulatory documents, which focus on safety, do not typically address gluten content.

Q: Why do official documents advise caution with certain other medications?

A: Official documents suggest that taking nonabsorbable antacids concurrently (at the same time) may inhibited the desired effect of Peristalid. This interaction is noted as a caution to ensure the medicine works correctly.

Q: Is Peristalid a daily medication?

A: For the treatment of constipation, the medication is generally prescribed to be taken once daily or divided into multiple daily doses, according to official administration guidelines.

Q: Can Peristalid cause changes in appetite?

A: Loss of appetite (anorexia) has been reported as an adverse reaction in some official sources. This is noted under the list of less common effects reported by patients.

Q: What are the severe but less common side effects listed for Peristalid?

A: The most severe effects are associated with taking too much medicine. Excessive dosage can lead to severe diarrhea, which may cause complications such as a significant loss of fluids and imbalance of electrolytes (salts) like potassium and sodium.

Q: Can children or teenagers use Peristalid?

A: Official regulatory documents state that the safety and effectiveness of Peristalid have not been established for use in pediatric patients (children and teenagers). Use is primarily detailed for adults.

Q: How does the mechanism of Peristalid relate to the symptoms it treats?

A: The medicine reaches the colon where it is broken down by bacteria into acids. This action draws water into the bowel and helps to stimulate the movement of the colon. This process softens the stool and promotes a bowel movement.

Q: Are there different strengths or forms of Peristalid available?

A: Peristalid is generally available as a liquid solution/syrup. In some regions or for specific indications, it may also be available as a powder for oral solution or an enema preparation (for rectal administration).

Q: What happens if I accidentally take two doses close together?

A: In the event of taking more than the intended amount (overdosage), the major expected symptoms described in official documentation are diarrhea and abdominal cramps.

Q: Do you need a special prescription or monitoring for Peristalid?

A: The medicine is available only with a prescription. Additionally, for patients using it long-term (more than six months), periodic laboratory monitoring of blood electrolytes may be advised.

Q: Is Peristalid taken with or without food generally?

A: The official documents provide flexibility, stating that the solution may be taken undiluted or mixed with liquids such as water, fruit juice, or milk.

Q: What if I have an existing heart condition? Can I still use Peristalid?

A: While not a direct contraindication, excessive dosage leading to diarrhea can cause a loss of fluids and electrolytes (salts). Because electrolyte imbalance is a risk factor for patients with heart conditions, this information is noted as a caution.

Q: What is the intended duration of treatment with Peristalid?

A: For chronic constipation, the duration is often long-term, and official documents advise for regular monitoring for patients using the medicine for more than six months.

Q: Do official sources mention any long-term effects of taking Peristalid?

A: Long-term safety data in humans is not fully known. However, official information describes risks associated with prolonged use, such as the potential for electrolyte disturbances, which may require monitoring.

Q: What kind of studies support the use of Peristalid?

A: Research to support the drug's use includes toxicity studies and reproduction studies in animals, and is also supported by data gathered from its long history of clinical use.

Q: Does Peristalid require refrigeration?

A: Official storage recommendations state that the medicine should not be refrigerated or frozen. Prolonged exposure to high temperatures or direct light should also be avoided to maintain the medicine's stability.

Q: What is the meaning of 'Pharmacodynamics' for Peristalid?

A: Pharmacodynamics describes how the medicine works in the body. It reaches the colon where it is broken down by bacteria into acids, which then draws water into the bowel and stimulates colonic movement.

Q: What are the common side effects of Peristalid?

A: The most commonly reported effects are typically experienced when treatment begins and include flatulence (gas), intestinal cramps, nausea, and vomiting. Official sources indicate that these initial discomforts are usually transient (temporary).

How should Peristalid be stored and disposed of?

The storage and disposal of Peristalid (Lactulose oral solution/syrup) are strictly defined by regulatory labeling to maintain the product's quality and ensure safety.

Storage Requirements

  • Temperature: Store at controlled room temperature, typically 20 C to 25 C (68 F to 77 F). Do not freeze and avoid prolonged exposure to temperatures above 30 C.
  • Protection: The container must be kept tightly closed and protected from direct light.
  • Stability: If extreme darkening and turbidity occur, the product must be discarded. A normal, slight darkening does not affect quality. Some regulatory labels require the product to be used within 12 months of first opening.
  • Child Safety: The medicine must be kept out of the sight and reach of children.

Disposal

  • Any unused or expired product must be disposed of in accordance with local requirements.
  • Do not dispose of the medicine via wastewater or household waste.

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

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