Lactulose Solution may be used to treat constipation as well as to avert or manage certain complications of liver disease.

Chronulac, Duphalac, Lactugal, Enulose, Kristalose


Osmolax, Duphalac, Livoluk, Laxoluz, Dulac

100ml, 200ml, 250ml

Solvay, Abbott, Panacea Biotec, Fourrts India Laboratories


3.35 g/5 mL (10 g/15 mL)



I. Introduction to Lactulose

A. Definition of Lactulose

Lactulose, a kind of sugar, holds a distinct place in the medical field because of its beneficial properties. Even though it isn't used for cooking due, to its taste it brings comfort to individuals dealing with specific health issues. This substance is a compound made up of two sugars and is primarily utilized to promote bowel movements and reduce ammonia levels.

B. Brief History and Discovery

Lactulose was first discovered in the 1950s and was initially used as a laxative. However, it was later found to be effective in treating encephalopathy a severe complication of liver disease. Since then, its usage has expanded, bringing relief to patients, around the world.

II. Composition of Lactulose

A. Basic Composition Details

At its fundamental level, Lactulose consists of two sugars, galactose and fructose. Its molecular formula is C12H22O11. The special connection between these two sugars allows it to resist the effects of enzymes in the upper part of the gastrointestinal tract, which is a crucial characteristic of its medicinal benefits.


B. Forms and Variations

Lactulose comes in forms to accommodate the different requirements of patients; Liquid Form; is the most commonly used form, usually prescribed for constipation and hepatic encephalopathy. Crystalline Form; Suitable for patients who may find the liquid form less preferable. Combination Products; Lactulose is frequently combined with laxatives to enhance its effectiveness.

C. Manufacturing Process

The production of Lactulose is a chemical procedure. It starts with lactose, the sugar present in milk. By utilizing heat and an acidic catalyst for isomerization, lactose transforms Lactulose. This process results in a product maintaining its sweet flavor while gaining distinctive medicinal attributes.

III. How Lactulose Works

A. Mechanism of Action

Lactulose works in a way. It is a type of sugar that the body doesn't absorb. Instead reaches the colon without being digested. In the colon, it undergoes a process where colonic bacteria break it down into acid and small amounts of formic and acetic acids. This creates an environment that attracts water into the colon through osmosis, making the stool softer and facilitating smooth muscle contractions to alleviate constipation. In cases of encephalopathy, this acidification process in the colon helps trap ammonia (NH3) by converting it into ammonium (NH4+). As a result, ammonia cannot cross the wall and enter the bloodstream, effectively reducing blood ammonia levels.

B. Absorption and Metabolism

Lactulose has a characteristic where it doesn't get absorbed well in the upper intestine. As a result, it reaches the colon primarily unchanged. In the colon, the bacteria present metabolize Lactulose. Create various short-chain fatty acids. These are responsible for the effects of Lactulose on our bodies.

IV. Uses of Lactulose

A. Primary Uses in Medicine

Lactulose is a compound derived from lactose typically used as a laxative. However, it can also be prescribed as a treatment for portal systemic encephalopathy (PSE), a neuropsychiatric condition that arises due to liver disease. PSE presents symptoms like confusion, asterixis, and coma. By reducing the production and absorption of ammonia in the intestines, lactulose plays a role in combating PSE123.

Here are some references:

B. Exploring Lesser-known Therapeutic Uses

Lactulose has become increasingly popular as a treatment option for managing subacute clinical encephalopathy. It has also been investigated as a remedy for hepatic encephalopathy, inflammatory bowel disease, and colon cancer. Recent research has even explored the potential of lactulose in developing therapies against cancer by targeting galectins, which are proteins involved in tumor progression123.

Here are some references:

C. Real-life Case Studies

Lactulose can be an option for managing chronic constipation when lifestyle changes and increasing fiber intake haven’t been effective. Because of its ability to significantly reduce intestinal transit time, it also possesses the ability to reduce the hyper-saturation of deoxycholic acid, thereby inhibiting cholesterol stone formation123.

Here are some references:

V. Off-Label Uses of Lactulose

A. Instances and Scenarios of Off-Label Use

Off-label use pertains to the utilization of a medication for a purpose rather than the regulatory agency's officially approved indication. Lactulose is no exception to this practice. While its primary application lies in acting as a laxative and aiding in treating systemic encephalopathy (PSE), studies have explored its potential efficacy in addressing hepatic encephalopathy, inflammatory bowel disease, and colon cancer.

Here are some references:

B. Scientific Evidence Supporting Off-Label Use

Research has indicated that lactulose can be utilized as a remedy for encephalopathy by diminishing the generation and intake of ammonia within the intestines1Lactulose has also been explored as a therapy for inflammatory bowel disease (IBD) because it can alleviate inflammation in the gastrointestinal tract2Furthermore, studies have revealed that lactulose possesses cancer characteristics as it can bind with galactin carbohydrates linked to different stages of tumor development1.

Here are some references:

C. Risks and Benefits

The risks and advantages of using lactulose for purposes not officially approved depend on the specific condition being addressed. For instance, using lactulose to treat encephalopathy has proven effective and has few reported side effects1. However, the effectiveness of lactulose in treating IBD is still under investigation. Its results are not yet conclusive2. The utilization of lactulose as an anticancer treatment is still in the phase and necessitates additional research.

Here are some references:

VI. Dosage and Administration of Lactulose

A. General Dosage Guidelines

The usual recommended amount of lactulose for adults who have constipation is generally 15 milliliters every day. Depending on how the person responds to this dosage can be adjusted as needed. In cases of encephalopathy, the initial dose typically ranges from 30 to 45 milliliters, taken three or four times throughout the day.

B. Dosage Variation Based on Specific Conditions

The amount of lactulose needed can differ significantly depending on the condition being treated. For instance, individuals experiencing constipation might require a dosage compared to those with hepatic encephalopathy. It's essential to follow the dosage provided by your healthcare professional to achieve the best therapeutic outcomes and minimize any potential side effects.

C. Guidelines for Administration

Lactulose can be ingested by mouth either with or without food. To enhance the flavor it is advisable to mix the dose in a glass of water or fruit juice. For measurement of the dose, it is recommended to utilize a medication measuring device instead of a regular spoon found in households.

VII. Special Precautions in Lactulose Administration

A. Administration to the Elderly

In the case of individuals, it is essential to be cautious with the dosage of medication as they may have heightened sensitivity, to its effects particularly when it comes to experiencing diarrhea. Medical professionals often start treatment with a dose and adjust it gradually based on individual needs and tolerability.

B. Administration to Pregnant Women and Nursing Mothers

Lactulose is usually regarded as safe to use when pregnant or breastfeeding. However, it's important to remember that during these stages, it should only be taken with the guidance and supervision of a healthcare professional.

C. Administration to Children

When it comes to children, the dosage of lactulose is determined based on their weight. It's essential for parents and caregivers to follow the pediatrician's instructions carefully when administering lactulose to avoid any side effects like diarrhea or imbalances, in electrolytes.

VIII. Potential Interactions of Lactulose

A. Drug-Drug Interactions

There have been no reported instances of lactulose causing any effects when taken with other medications. However, it's essential to inform your healthcare provider about all the medications you are currently taking, whether they are prescribed, over the counter, or herbal supplements. This is done to ensure that there are no reactions or side effects.

B. Drug-Food Interactions

There haven't been any documented instances of lactulose interacting with food or drugs. However, individuals should maintain a balanced diet while undergoing lactulose therapy since it can result in diarrhea and potentially disrupt electrolyte balance.


C. Impact of Other Medical Conditions

People with diabetes or lactose intolerance should be careful when using lactulose. While the amount of sugar absorbed from lactulose is minimal, its recommended for individuals with diabetes to monitor their usage carefully. If you have an intolerance, you may experience discomfort in your abdomen, and it's important to talk to your healthcare provider about it.

IX. Side Effects of Lactulose

A. Common Side Effects

Like any medication, Lactulose can sometimes cause side effects. The commonly reported side effects are usually related to the gastrointestinal system and may include symptoms like excessive gas, discomfort in the abdomen, feeling nauseous, or experiencing diarrhea. However, it's important to note that these reactions are typically temporary and tend to fade as your body adapts to the medication.

B. Less Common, Serious Side Effects

Although not very common there are cases where Lactulose may cause severe side effects in specific individuals. These side effects could include a heartbeat, changes, in mood, seizures or persistent diarrhea. If any of these symptoms occur, it is crucial to seek medical attention.

C. Handling and Managing Side Effects

It is essential to manage side effects to ensure patient comfort and the continuous effectiveness of therapy. If patients experience side effects such as diarrhea and abdominal cramping reducing the dosage might help alleviate any discomfort. Staying hydrated is essential to compensate for any loss caused by these side effects. However, if severe side effects occur, seeking medical advice is crucial.

X. Overdosage and Handling Precautions of Lactulose

A. Symptoms of Overdosage

Taking much Lactulose can lead to symptoms that are similar to its side effects but more severe. These symptoms may include diarrhea, abdominal cramps, or imbalances in electrolytes caused by excessive loss of fluids.

B. Management and Remedial Measures

Dealing with an overdose of Lactulose involves stopping the medication and providing symptomatic and supportive care. For example, if there are imbalances in electrolytes, it may be necessary to administer electrolyte replacement. In these situations seeking medical help is crucial.

C. Safety and Handling Precautions

To ensure the use of Lactulose, it is essential to follow the prescribed dosages promptly, report any side effects, and regularly monitor individuals using it long-term. It is highly recommended to refrain from self-medicating or misusing Lactulose.

XI. Warnings and Contraindications of Lactulose

A. General Warnings

If you are following a Lactulose treatment, knowing that you may experience some discomfort and diarrhea is essential. People with diabetes should regularly monitor their blood glucose levels. If you are on a lactose-restricted diet, please consider the lactose in Lactulose.

B. Contraindications based on Health Conditions

People who have galactosemia should steer clear of Lactulose because it contains galactose. Moreover, individuals with an ileostomy or colostomy or bowel obstruction should refrain from using Lactulose unless professionals closely monitor them.

C. Potential Risks with Long-term Use

Extended use of Lactulose can cause electrolyte imbalances because it may result in diarrhea. Hence individuals who are on a long-term treatment plan should have their electrolyte levels regularly checked to avoid complications.

XII. Storage of Lactulose

A. Proper Storage Conditions

Lactulose is best stored in a room, with temperatures ranging from 15 to 30 degrees Celsius (59 86 degrees Fahrenheit). It's essential to keep it from direct light excessive heat and moisture to ensure its effectiveness. Like any medication, storing Lactulose in a place where children and pets cannot access it for their safety is crucial.

B. Shelf Life and Expiry Details

Unopened Lactulose bottles can be stored for three years. Once you open a bottle, it usually remains effective for six months. However, it's always advisable to consult the manufacturer's instructions or speak with a pharmacist to get information. Not using medications beyond their expiration date is essential as their effectiveness and safety may no longer be assured.

C. Precautions to Avoid Contamination

To prevent any contamination, it is crucial to refrain from touching the top of the Lactulose bottle with anything, including your hands or any surfaces. Make sure to close the cap after each use. If you have any concerns about contamination of your medication, it is best to dispose of it safely and acquire a fresh supply.

XIII. Cautious Administration of Lactulose

A. Factors to Consider for Cautious Administration

There are reasons why it is essential to be careful when administering Lactulose. These factors include but are not limited to the patient's age, any existing gastrointestinal conditions, the possibility of electrolyte imbalance, and whether they have diabetes. Additionally, patients who have a history of severe diarrhea should use Lactulose with caution.

B. Situations Requiring Extra Caution

It is essential to exercise care when giving Lactulose to people with specific health conditions like diabetes because it contains sugars. Individuals with a history of blockage or surgery liver problems or dehydration should also be cautious when using Lactulose. In these cases, seeking guidance from a healthcare professional is crucial.

C. Management of Adverse Events

If you experience any effects, it is essential to stop taking Lactulose immediately and seek advice from a healthcare professional. If you have discomfort in your abdomen, reducing the dosage may help, but if the side effects persist or become severe, it's essential to seek medical attention. It is crucial to be aware of the signs of a reaction, such as a rash, swelling, or difficulty breathing. If you notice any of these symptoms, immediate medical intervention is necessary.

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