Andial

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Andial

Method of action: Antidiarrheal, Obstructive

Treatment option: Irritable Bowel Syndrome

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 Andial

Property Description
Active Ingredient Loperamide hydrochloride
Form Tablet, Capsule, Oral Solution
Pharmacological Class Antidiarrheal Agent
Common Use Symptomatic relief of diarrhea
Origin Synthetic Phenylpiperidine Derivative

Andial: Definition and Core Pharmacological Class

Andial is a pharmaceutical preparation whose primary effect is attributed to the active ingredient loperamide hydrochloride, formally classified as an antidiarrheal agent. This compound is a synthetic phenylpiperidine opioid derivative that functions as a selective mu-opioid receptor agonist within the bowel wall. Clinical research has supported loperamide's role in the symptomatic management of intestinal hypermotility, and the drug is included on the World Health Organization's List of Essential Medicines.

Composition and Pharmaceutical Forms

This product is formulated as a single-ingredient product, containing only loperamide hydrochloride combined with appropriate, inert pharmaceutical excipients for oral route of administration. The compound is entirely synthetic in origin, offering a standardized pharmacological profile. It is commonly supplied in standard dosage form(s), including the solid forms of a capsule and a tablet, but may also be available as an oral solution. These accessible preparations provide a straightforward means of delivering the active substance to the gastrointestinal tract.

General Therapeutic Purpose and Intestinal Regulation

The overarching purpose of Andial is to provide symptomatic relief from intestinal distress by facilitating the regulation of intestinal rhythm and supporting the restoration of fluid balance. It achieves this by selectively binding to receptors in the gut to slow down intestinal motility, which increases the time available for the intestinal lining to absorb water and electrolytes back into the body. This drug action is designed to decrease the frequency of bowel movements and yield an increase in stool consistency, stabilizing digestive function.

Regulatory References

  1. WHO Essential Medicines List

What side effects are possible with Andial?

Possible Side Effects and Safety Information

The official safety documentation for Andial (Loperamide hydrochloride) classifies potential adverse reactions according to the frequency observed in clinical use and post-marketing reports, primarily affecting the gastrointestinal and nervous systems.

Adverse reactions are grouped by System Organ Class (SOC) and generally categorized by frequency:

  • Common Reactions (occurring in 1 to 10 out of 100 patients) include constipation, flatulence, headache, and nausea.
  • Uncommon Reactions include abdominal pain, dry mouth, dizziness, vomiting, and rash.
  • Rare Reactions include events such as ileus (paralytic ileus), urinary retention, and loss of consciousness.

Serious Adverse Reactions

While rare, certain serious adverse events are documented in regulatory labeling. These include toxic megacolon, which may occur in patients with acute colitis or Inflammatory Bowel Disease, as well as anaphylactic reactions and abdominal distension.

Population-Specific Safety Constraints

Official safety information provides specific considerations for certain patient groups. Use of this medication is generally contraindicated in children under two years of age due to the potential for central nervous system effects. Additionally, caution is required for individuals with severe hepatic impairment, as reduced metabolism may increase the risk of systemic exposure and adverse reactions.

Safety-Related Restrictions

The medicine is restricted from use in conditions where inhibition of bowel movement is undesirable due to the risk of serious complications like ileus. It is also not indicated in cases of certain types of bacterial enteritis where slowing motility could increase the systemic absorption of toxins.

Overdose and Emergency Response

An overdose of Andial (Loperamide) presents with officially documented manifestations primarily impacting the central nervous and cardiovascular systems. Signs of Central Nervous System (CNS) depression include stupor, depressed level of consciousness, somnolence, confusion, and miosis. Gastrointestinal manifestations, such as severe constipation and paralytic ileus, are also documented.

The most serious and potentially fatal outcomes involve cardiac toxicity. Regulatory information states that severe overexposure can result in life-threatening ventricular arrhythmias, including QT interval prolongation, Torsades de Pointes, and cardiac arrest. Respiratory depression is also listed as a severe outcome.

Due to these critical risks, regulators mandate that immediate medical attention must be sought, and a Poison Control Center contacted. Urgent emergency services are required if any signs of a severe event occur, such as fainting, a rapid or irregular heartbeat, or unresponsiveness.

Management involves administering Naloxone as the specific antidote for CNS depression. However, because the active ingredient has a prolonged duration of effect, patients require continuous monitoring for a minimum of 48 hours to detect potential re-emergence of CNS or cardiac symptoms. Official labeling also notes that pediatric patients under 2 years and those with hepatic impairment are at increased risk of severe adverse events or CNS toxicity.

Therapeutic Uses of Andial

What Andial Treats: Main Uses and Benefits

Andial is commonly used for managing symptoms related to heightened physiological activity in the gut, offering supportive therapeutic benefit across key clinical domains. The primary therapeutic applications are commonly recognized.

The medication is applicable in conditions involving episodic or fluctuating manifestations, such as acute, non-specific diarrhea (including traveler's diarrhea), and in chronic conditions like Inflammatory Bowel Disease (IBD), where it may assist with maintaining functional stability. It is also relevant for specialized management, such as managing the volume of discharge from an ileostomy.

“The goal is to provide supportive relief during difficult episodes, easing the overall symptom burden.”

This therapeutic focus may help address pronounced symptoms of stool consistency alteration, excessive frequency, and bowel control disruption. By assisting patients with symptom fluctuations, the medication may contribute to easing day-to-day comfort during symptomatic periods.


Quick Fact: Relief for Bowel Hypermotility Andial supports patients during episodes associated with acute functional strain by managing symptom clusters that may appear suddenly, like high stool frequency and associated urgency.


Eligibility and Restrictions for Use

Who can and cannot use Andial?

Official regulatory documents define strict criteria for the use of Andial (Loperamide hydrochloride). The medicine is generally authorized for adults and children aged 12 years and over for acute diarrhea, although specific pediatric age limits for general use vary by region.


Eligibility Scope

Category Official Regulatory Statement
Populations for whom use is allowed Adults and children aged 12 years and over for acute, symptomatic relief of diarrhea.
Populations for whom use is contraindicated Children less than 2 years of age are strictly excluded due to the risk of serious cardiac and respiratory adverse events.

Eligibility-Related Restrictions

Classification Rule
Absolute Exclusion The medicine must not be used in patients with a known hypersensitivity or abdominal pain in the absence of diarrhea.
Condition-Based Exclusion Use is strictly forbidden in cases of acute dysentery (bloody stools/high fever) and serious gastrointestinal inflammatory conditions (e.g., acute ulcerative colitis) due to the risk of toxic megacolon.
Conditional Use Patients with hepatic impairment require cautious use and monitoring. Use is generally not recommended during pregnancy or breastfeeding as safety has not been established.

Connection to the Overall Eligibility Profile

Regulatory documents define eligibility by emphasizing strict prohibitions to mitigate the risk of severe complications associated with inhibiting peristalsis in vulnerable populations. The classifications mandate absolute exclusion for infants and those with infectious GI diseases, while imposing conditional use for specific organ function and physiological states.

What should I know about interactions with other medicines?

Andial's interaction profile is structured by restrictions based on pharmacodynamic risk and changes to systemic exposure driven by metabolic and transporter interference.

Co-administration with other medicinal products and herbal products known to prolong the QT interval is formally advised to be avoided. This restriction is established in regulatory labeling due to the potential risk of serious cardiac events, which includes ventricular arrhythmias.

Loperamide is a substrate for the P-glycoprotein (P-gp) efflux pump and is metabolized by the CYP3A4 and CYP2C8 enzymes. Inhibition of these pathways significantly alters the drug’s clearance and systemic exposure. The official documentation describes specific pharmacokinetic consequences:

Interacting Substance/Type Official Interaction Outcome
P-gp/CYP Inhibitors (e.g., Ritonavir, Ketoconazole) Increases loperamide plasma concentrations up to 5-fold; combined inhibitors (e.g., Itraconazole and Gemfibrozil) cause up to a 13-fold increase in total exposure.
Oral Desmopressin Concentrations of Desmopressin increase 3-fold due to loperamide’s effect of slowed gastrointestinal motility.
Saquinavir (P-gp substrate) Loperamide co-administration reduces Saquinavir exposure by 54%.

Caution is noted for patients with hepatic impairment, as reduced first-pass metabolism may increase systemic exposure, elevating the documented risk of Central Nervous System effects. The official regulatory labeling does not contain mandatory rules requiring the separation of administration by a specified time interval for any substance.

Mechanism of Action

Andial is a selective, non-competitive allosteric modulator of the alpha7-nicotinic acetylcholine receptor (alpha7-nAChR). Binding at the allosteric site induces a positive conformational change in the receptor complex, which amplifies Ca^2+ influx through the channel. This receptor modulation influences the JAK/ STAT signaling pathway, resulting in reduced activation of the NF-kappa B transcription factor.

Inhibition of NF-kappa B signaling decreases the transcription and synthesis of several pro-inflammatory cytokines (e.g., IL-1beta, IL-6, TNF-alpha). Concurrently, Andial acts as a selective inhibitor of c-Src kinase, an enzyme involved in intracellular signaling cascades. Inhibition of c-Src alters the phosphorylation of multiple downstream substrates and modulates cell-to-cell communication. The convergence of alpha7-nAChR modulation and c-Src kinase inhibition ultimately results in the attenuation of chronic inflammatory signals across multiple cell types.

Dosage and Administration Information

How to Use Andial: Official Instructions

Andial (loperamide) must be administered strictly according to the official instructions. It is taken orally to address acute diarrhea.

Dosing and Administration

Age Group Initial Dose Subsequent Dose (After Each Loose Stool) Maximum Daily Dose
Adults (Self-medication) 4 mg 2 mg 8 mg (in 24 hours)
Children (12 years and over) 4 mg 2 mg 8 mg (in 24 hours)

This medicine can be taken with or without food. The capsules or standard tablets must be swallowed whole with liquid and should not be crushed, chewed, or broken. For liquid forms, the product must be shaken and measured using a calibrated device.

Procedural and Duration Rules

  • Frequency: The initial dose is fixed, followed by subsequent doses taken on an as-needed basis after each unformed stool.
  • Missed Dose: Since this medicine is taken in response to a symptom (a loose stool), there are no specified missed-dose instructions; do not take an extra dose.
  • Treatment Duration: Stop taking Andial as soon as the diarrhea is controlled. Treatment for self-medication must not exceed 48 hours. If diarrhea persists beyond this period, immediately discontinue use and consult a healthcare professional. The maximum daily dose must never be exceeded, even if symptoms continue. Use in children under 12 years is typically weight-based or contraindicated without specific medical direction.

Recent Clinical Evidence

Research evidence / Overview of studies for Andial


Evidence for Use in Acute, Non-Specific Diarrhea

Research has explored Andial in conditions characterized by acute or disruptive episodes, particularly sudden diarrhea not caused by severe infection. The primary evidence base consists of short-term, randomized controlled trials (RCTs), many of which were designed to compare the medicine against a placebo (an inactive substance). Research examined outcomes describing episodic or acute changes, such as the time until the last unformed stool and the overall duration of the episode. Studies monitored changes in stool frequency and consistency.

Findings from these RCTs and subsequent analyses describe patterns observed in the studies where the duration of acute diarrhea episodes was reported as reduced in the intervention groups compared to the placebo groups. The research highlights changes measured during the study period related to stool frequency and consistency. This evidence contributes to understanding symptom patterns during a phase of heightened symptom activity.

Despite the extensive research, the follow-up durations were limited, with most data applying only to the immediate 48- to 72-hour period. This means long-term effects are not fully established regarding the recovery process following the acute episode. Furthermore, data for certain groups remain insufficient, especially regarding research exploring the use of the medicine in children under the age of two.


Evidence for Symptomatic Management of Chronic Diarrhea

Andial was evaluated in studies exploring its role in managing chronic symptoms, often conditions characterized by fluctuating or episodic manifestations linked to underlying issues such as Inflammatory Bowel Disease (IBD) or certain chronic functional bowel disorders. The research in this area includes both controlled clinical studies and observational settings. Studies explored how the medicine might impact outcomes related to systemic or functional imbalance, primarily focusing on managing stool frequency and consistency over intermediate time intervals in adults applied in research contexts involving fluctuating or unstable symptoms.

Research describes that in patients using the medicine over several weeks, patterns observed in the studies included lower reported stool frequency compared to their baseline state. Data show patterns related to changes in stool frequency; however, findings were mixed regarding its simultaneous impact on other associated patient-reported outcomes describing perceived discomfort, such as abdominal pain or bloating, particularly in functional disorders.


Evidence for Management of High Ileostomy Output

This area of research includes well-controlled randomized controlled trials (RCTs), often using a crossover design. These studies research examined precise, quantitative outcomes related to systemic or functional imbalance, specifically monitoring the measured 24-hour ileostomy output volume and associated changes in serum electrolyte levels.


Study Focus on Special Populations

Andial was evaluated in various research settings, including trials focusing on children (typically aged two years and older) and older adults. For the pediatric population, evidence is limited for very young children (under two years old), and this is an area where specific research is scarce.


What Remains Uncertain in the Research

While a significant body of evidence supports the use of Andial for its primary indications, evidence highlights what is known — and what is still uncertain. For acute uses, the follow-up durations were limited. Overall, comparative evidence is lacking to sufficiently compare the medicine against all other potential therapies, and certain research limitation frames apply, such as variations in study designs across the entire body of evidence.

Key Studies & References WHO Model Lists of Essential Medicines (Reference for global public health relevance)

Frequently Asked Questions (FAQ)

Common questions about Andial (FAQ)


Q: How long does it typically take for people to notice any changes after starting Andial?

Evidence from clinical trials indicates that the antidiarrhoeal action of the active ingredient, loperamide, may be observed quickly. Regulatory documents report that the onset of action was seen within approximately one hour following the start of treatment with a single therapeutic dose.

Q: Is Andial a type of antibiotic or steroid?

No, the official classification of Andial is an Antidiarrheal Agent. The active ingredient is a synthetic phenylpiperidine opioid derivative that works to slow intestinal movement and help restore fluid balance. It is not classified as an antibiotic, which fights bacteria, or a steroid.

Q: Is Andial a controlled substance?

No, according to regulatory classification, the active ingredient in Andial, Loperamide HCl, is not listed as a controlled substance when formulated for its standard therapeutic use.

Q: What is the half-life of Andial, generally speaking?

The half-life is a measure of the time it takes for the amount of drug in the body to be reduced by half. According to the pharmacokinetic data in official labeling, the apparent elimination half-life of the active ingredient is approximately 10.8 hours, with a reported range of 9.1 to 14.4 hours.

Q: Can people with kidney problems use Andial?

Official regulatory documentation states that since the majority of the active ingredient is eliminated from the body through the feces, dosage adjustments are generally not necessary for patients with kidney (renal) impairment.

Q: Are there any specific foods or drinks that should be avoided with Andial?

Regulatory documents indicate there are no known interactions between the medicine and most foods or drinks, and the medicine can be taken with or without food. However, official warnings describe avoiding or limiting alcohol consumption, as it may increase nervous system side effects like dizziness.

Q: Are there any warnings about using alcohol while taking Andial?

Yes, official regulatory information advises caution regarding alcohol use. While a direct chemical interaction is not listed, alcohol may intensify nervous system side effects of the medicine, such as dizziness or difficulty concentrating. Regulatory documentation notes the caution regarding alcohol use.

Q: Is it normal to feel a bit drowsy when first starting Andial?

Official regulatory information acknowledges the possibility of this experience. Labeling notes that drowsiness and tiredness are potential side effects that may occur when a person is using the medicine to treat diarrheal symptoms.

Q: Can I drive or operate machinery while using Andial?

Official regulatory labeling describes the need for caution when driving or operating machinery. This is because symptoms of diarrhea itself, or potential side effects of the medicine such as tiredness, dizziness, or drowsiness, may affect mental alertness and motor skills.

Q: What information is usually given about Andial's potential for overdose?

Regulatory documents contain warnings about the risks associated with taking higher-than-recommended doses. Overdosage carries a risk of life-threatening cardiac problems, including QT interval prolongation and dangerous heart rhythms, as well as severe depression of the Central Nervous System.

Q: Why is a prescription needed for Andial?

The regulatory status of Loperamide HCl is typically classified as an Over-The-Counter (OTC) drug when used at recommended doses for acute diarrhea. However, prescription strength or specific formulations may exist for the management of chronic conditions.

Q: What are the ingredients in Andial?

The active ingredient that treats the symptoms is Loperamide HCl. The official documents state that this is combined with various inactive ingredients (excipients) necessary for the product's form, which can include items like corn starch, magnesium stearate, lactose, and coloring agents.

Q: What does 'contraindicated' mean in relation to Andial?

When a medicine is 'contraindicated,' it means that, according to official regulatory documentation, the term indicates that the drug's use is formally prohibited under specific conditions or by certain patient groups. This is because the risks of using the medicine in those circumstances are known to be high, such as for children under two years old or patients with acute dysentery.

Q: Can Andial be taken with common over-the-counter painkillers?

Official drug labeling identifies specific categories of drugs that interact with Andial, such as those that inhibit the CYP or P-gp enzymes. However, the regulatory information does not list every common non-prescription painkiller individually. The official product information emphasizes the importance of informing a healthcare professional about all other medications, including non-prescription products.

Q: What are the signs that a person might be having a serious interaction with Andial?

Regulatory warnings describe serious adverse reactions, often linked to misuse or overdose, that a person should be aware of. These signs include symptoms of cardiotoxicity, such as a rapid or irregular heartbeat and fainting. These symptoms indicate potential central nervous system (CNS) or cardiac depression.

Q: Do I need to do special monitoring or blood tests while using Andial?

For most patients, routine special monitoring is not mentioned in the official instructions. However, regulatory documentation notes that close monitoring is required for individuals with severe hepatic (liver) impairment. This caution is advised because reduced liver metabolism could lead to increased exposure to the drug, raising the potential for Central Nervous System toxicity.

Q: Can Andial cause changes in appetite or weight?

Official safety documentation does list loss of appetite as a reported adverse event in some patients. Changes in body weight are not explicitly listed in the commonly documented side effects.

Q: What do official sources say about the risk of dependence or addiction with Andial?

Official warnings describe that the medicine is only intended for use at recommended therapeutic doses to avoid serious side effects. Regulatory bodies have documented cases of misuse and abuse involving much higher than recommended doses, often linked to attempts to manage opioid withdrawal or induce euphoric effects.

Q: Is there a risk of withdrawal effects if Andial is stopped suddenly?

While the medicine is not considered a primary dependence risk at therapeutic doses, regulatory warnings exist due to misuse cases. Cases of chronic misuse and abuse involving very high doses have been associated with reports of withdrawal symptoms similar to those linked with other opioids when the drug is stopped.

Q: Does Andial affect birth control pills or devices?

The official drug label does not indicate a direct chemical interaction between the active ingredient and hormonal birth control. Regulatory information notes that severe diarrhea itself may potentially interfere with the proper absorption of oral contraceptive pills.

Q: What is the main difference between the active and inactive ingredients in Andial?

The active ingredient (Loperamide HCl) is the component that produces the intended medicinal effect, which is slowing down intestinal movement. Inactive ingredients (or excipients) are substances added to create the product's form, stability, or color, but they have no therapeutic effect on the body.

Q: What is the difference between the brand name and generic version of Andial?

Regulatory agencies require that a generic version contain the exact same active ingredient (Loperamide HCl) and be identical in terms of strength, dosage form, and route of administration. The generic product must also meet the same rigorous quality and performance standards as the brand-name product.

Q: Does Andial interact with common herbal supplements like St. John's Wort?

The official label emphasizes the importance of informing a healthcare provider about all medications, vitamins, and herbal supplements being used. This is especially important for supplements that may affect the enzymes (like P-glycoprotein or CYP enzymes) that process the drug in the body.

How should Andial be stored and disposed of?

The storage and disposal of Andial (loperamide hydrochloride) must strictly adhere to the conditions mandated by regulatory labeling to maintain product stability and safety.

Storage Requirements

Classification Requirement
Temperature Store at Controlled Room Temperature (20 C to 25 C / 68 F to 77 F), avoiding excessive heat.
Protection The product must be protected from moisture and light. Do not freeze.
Packaging Keep the medicine in its original, tightly closed container; do not use if the package seal or blister unit is open or torn.
Child Safety Mandatory instruction to keep out of the sight and reach of children.

Disposal Instructions

Unused or expired product must be disposed of in accordance with local requirements or by utilizing a drug take-back program where available. Regulatory documents explicitly prohibit disposing of the medicine via wastewater (e.g., flushing down the toilet).

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

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