Colic

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Colic

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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 Colic

Quick Facts

Property Description
Active ingredient Homatropine Methylbromide, Hyoscine Butylbromide
Form Tablets, Solution for injection
Pharmacological class Antispasmodic Agent / Anticholinergic Agent
Common use Relief of visceral smooth muscle cramping/spasm
Origin Semisynthetic derivative of Belladonna alkaloids

What Type of Medicine is Colic?

The medicine combining Homatropine Methylbromide and Hyoscine Butylbromide is classified fundamentally as an Antispasmodic Agent, designed to halt involuntary muscle contractions. This dual-component product belongs to the broader pharmacological group of Anticholinergic Agents or Antimuscarinics because its mechanism involves interfering with the function of the neurotransmitter acetylcholine. The general purpose of this therapy is to provide relief from the intense, cramping pain that occurs when the smooth muscles found in internal organs, such as those in the digestive and urinary tracts, contract forcefully. The medicine is utilized for managing visceral spasms.


Homatropine and Hyoscine: Composition and Differentiation

The active components are Homatropine Methylbromide and Hyoscine Butylbromide (Scopolamine Butylbromide). Both are chemically defined as semisynthetic derivatives of natural Belladonna alkaloids, indicating they are laboratory-modified plant compounds tailored for specific therapeutic outcomes. The structural modification to a quaternary ammonium compound ensures that the effect is primarily a peripheral action, focusing the drug's activity on the digestive and urinary tracts. This design is intended to concentrate the relief where the spasm originates. This specific combination is prepared in various dosage forms, including Tablets for oral intake and a Solution for injection reserved for parenteral administration in acute settings.


How Does This Antispasmodic Differ from Painkillers?

Unlike general pain relievers that simply mask the sensation of pain, an antispasmodic works to address the direct cause of cramping pain through a spasmolytic action. This effect is achieved by interrupting the signal flow from the nervous system to the smooth muscle fibers, thereby promoting muscle relaxation. This mechanism makes the medicine applicable for managing episodes of sharp, non-chronic abdominal discomfort—a common use scenario. Because the medicine’s design favors focused peripheral action, it is specifically used for pain originating from the muscles of the internal viscera.

Regulatory References

  1. MedlinePlus for Antispasmodics

What side effects are possible with Colic?

Possible Side Effects and Safety Information

The safety profile for products associated with the treatment of colic must consider the risks of certain active pharmacological agents and the hazards of unapproved or compounded preparations.

Serious Adverse Reactions and Regulatory Warnings

Official regulatory bodies (e.g., FDA, TGA) have issued warnings regarding certain compounded or homeopathic colic preparations containing Atropa belladonna (a toxic substance). Use of these unapproved products in infants and young children is associated with the risk of belladonna toxicity and serious adverse events, including:

  • Anticholinergic Syndrome symptoms: seizures, high temperature, severe agitation, drowsiness, floppiness, poor feeding, difficulty breathing, and rapid heart rate (tachycardia).
  • The belladonna content in some products has been found to be inconsistent and may exceed labeled amounts, posing an unnecessary risk.

Adverse Reactions of Anticholinergic Agents (e.g., Hyoscyamine)

Pharmacological agents sometimes used for conditions that present with colic-like symptoms (e.g., anticholinergics like hyoscyamine) have documented side effects that primarily affect the nervous, gastrointestinal, and cardiovascular systems. Common adverse reactions include:

  • Nervous System: Drowsiness, dizziness, headache, and blurred vision.
  • Gastrointestinal: Dry mouth, constipation, and urinary retention.
  • Cardiovascular: Tachycardia (fast or irregular heartbeat).

Population-Specific Safety Notes

  • Infants and Young Children are especially susceptible to the toxic effects of anticholinergics and have a risk of rapid increase in body temperature due to decreased sweating.
  • Geriatric Patients may be more susceptible to side effects such as confusion, agitation, drowsiness, dry mouth, and urinary retention, and should be monitored closely.

Restrictions and Limitations

This class of drugs is contraindicated in patients with certain pre-existing conditions, including glaucoma, myasthenia gravis, severe ulcerative colitis, and obstructive diseases of the gastrointestinal or urinary tracts. Patients should be warned that these agents may impair the ability to perform tasks requiring mental alertness, such as driving or operating machinery.

Overdose and Emergency Response

Overdose and When to Seek Help

This information is based on official government regulatory documents detailing the potential effects and necessary actions following an overdose of medications used for colic.


Documented Overdose Manifestations

Regulatory sources define overdose presentations by symptom clusters affecting key physiological systems. Documented signs may include excessive CNS depression (e.g., profound drowsiness, somnolence, stupor) and severe anticholinergic effects (e.g., mydriasis, severe dry mouth, urinary retention). Vomiting and nausea are also commonly reported, often leading to dehydration.

Life-Threatening Outcomes

Serious or potentially fatal outcomes explicitly linked to overexposure include severe respiratory depression, seizures, coma, and cardiovascular collapse (profound hypotension or significant arrhythmia). These severe effects are generally associated with ingestion significantly exceeding the maximum therapeutic dose.


Emergency Actions Mandated by Regulators

Immediate medical attention is required for any known or suspected overdose. Official documents instruct users to IMMEDIATELY contact emergency medical services (EMS) or a certified Poison Control Center in their region. Healthcare providers should prioritize supportive management, including continuous monitoring of cardiac and respiratory function. For specific active ingredients, an antidote may be available; however, management often involves supportive care and measures such as activated charcoal to limit absorption.

Therapeutic Uses of Colic

Colic: Main Uses and Benefits

Quick Facts: Therapeutic Domain
May help to manage symptoms of unexplained, excessive crying in otherwise healthy infants.
An approach used to support caregivers in coping with the challenges associated with infant distress.
Dietary modifications and specific probiotic strains may be considered as options for symptom relief.

Infantile colic is characterized by recurrent and prolonged periods of infant crying, fussing, or irritability that occur without apparent cause and cannot be easily resolved. The condition is generally self-limited, with symptoms typically improving or resolving by three to six months of age. The cornerstone of management is parental reassurance and support.

Treatment options focus on providing relief and support to both the infant and the caregiver. These approaches may include changes in feeding practices and the use of certain interventions to support the infant's comfort and digestive health. For exclusively breastfed infants, the probiotic Lactobacillus reuteri (strain DSM 17938) may be considered, and maternal dietary exclusion of common allergens has been explored for symptom reduction. For formula-fed infants, a trial of an extensively hydrolyzed formula may be recommended.

It is important to understand that no single effective treatment exists, and interventions are aimed at reducing the burden of crying for the family.

Regulatory References

  1. AAFP clinical guidance on infantile colic

Eligibility and Restrictions for Use

Eligibility Map: Who Can and Cannot Use Colic — Official Regulatory Information

Official regulatory documents define the eligibility for this antispasmodic medicine based on age, physiological status, and the presence of specific comorbidities.

Contraindicated Populations (Must Not Use)

Condition Regulatory Status
Myasthenia Gravis Contraindicated
Untreated Narrow Angle Glaucoma Contraindicated
Mechanical Stenosis / Obstructive Ileus Contraindicated
Prostatic Hypertrophy with Urinary Retention Contraindicated
Megacolon Contraindicated

Age and Reproductive Status Rules

Population Regulatory Status
Children under 6 years (Tablets) Not Recommended
Pregnancy Not Recommended
Lactation (Breastfeeding) Not Recommended
Adults and Children 6 years and older Approved for Use

Eligibility-Related Restrictions

Use is subject to caution for patients with severe hepatic or renal impairment and those with existing cardiac conditions such as tachycardia or cardiac failure. The tablet formulation is also contraindicated for individuals with certain hereditary metabolic disorders like galactose or fructose intolerance, due to the presence of excipients.

What should I know about interactions with other medicines?

Interactions with other Medicines and Products: Official Regulatory Information

The interaction profile for the active ingredients, Homatropine Methylbromide and Hyoscine Butylbromide, is primarily based on their classification as Anticholinergic Agents, as documented in government regulatory labeling.


Documented Pharmacodynamic Interactions

Interaction Type Interacting Product Categories Regulatory Statement
Reinforcement Tricyclic Antidepressants, Antihistamines, Antipsychotics, Quinidine, Amantadine, Disopyramide, and other Anticholinergics May intensify the medicine's anticholinergic effects.
Antagonism Dopamine Antagonists (e.g., Metoclopramide, Domperidone) May result in a diminution of effects on gastrointestinal motility for both agents.
Reinforcement Beta-adrenergic agents May enhance the tachycardic effects of these agents.

Official Constraints and Restrictions

Contraindicated Combination: For patients receiving anticoagulant drugs, the injectable solution is officially contraindicated for intramuscular injection due to the documented risk of intramuscular hematoma.

Timing Requirement: When taking the oral formulation, antacids or adsorbent antidiarrheals must be administered at least one hour after the anticholinergic component to prevent interference that could lead to reduced absorption. The official labeling does not document clinically relevant interactions with food, alcohol, or major metabolic enzyme systems (CYP450) requiring specific restrictions.

Mechanism of Action

How Colic Works

The drug's action is defined by a precise engagement with specific biological pathways, primarily aiming to regulate hyperactive processes within the gastrointestinal tract to modify a state of physiological balance.

Modulation of Gastrointestinal Smooth Muscle Activity

This core mechanism involves an antispasmodic action that directly interferes with signaling pathways, such as those mediated by acetylcholine, responsible for triggering excessive and uncoordinated contractions of the gut's smooth muscle. This engagement results in the modulation of peristaltic rhythm and reduced uncoordinated muscle contractions, affecting the muscular layer's response to spasmodic stimuli in the affected region.

Influence on Enteric Nervous System (ENS) Reflexes

The drug engages mechanisms that influence the autonomy and regulation of the local neural network of the gut (ENS). Stabilizing local reflexes within the ENS results in the suppression of reflex cycles and limits the propagation of hyperexcitability, thereby maintaining the integrity of intrinsic gut regulation.

Action on Visceral Pain Signal Transmission

This domain addresses the drug's effect on afferent nerve fibers. Modifying early molecular steps at the nerve endings helps to limit downstream effects of heightened sensory input, modulating afferent signal generation related to visceral excitability and influencing the signal output from visceral sensory neurons.

Dosage and Administration Information

Regulatory Status and Official Use Instructions

The term Colic describes a behavioral syndrome in infants and is not the name of a single, regulatory-approved pharmaceutical drug for human use. Consequently, there are no official governmental regulatory documents that provide standardized instructions for its administration, dosing, or preparation.


Administration Scope (Based on Regulatory Principles)

Feature Official Regulatory Instruction
Route of Administration Not applicable; Colic is not an approved pharmaceutical product.
Official Dosing Schedule Not officially documented for this term.
Age-Group Rules Not documented. General warnings exist regarding the use of certain products (e.g., dicyclomine) in infants due to serious side effects.
Preparation Requirements Not applicable; no reconstitution or dilution instructions exist.
Missed-Dose Rules Not applicable; no structured regimen exists.

Official Use Protocol

Due to the lack of an approved pharmaceutical drug named Colic, official guidance focuses on the management of the symptom of infantile colic. Non-pharmacologic approaches—such as feeding adjustments, caregiver support, and reduction of environmental stimuli—are generally preferred. While some over-the-counter products or supplements (e.g., Lactobacillus reuteri probiotics, simethicone drops) have been studied, no specific drug has been approved for treating colic in infants, and the evidence for such non-prescription agents is often limited or inconsistent. The use of unapproved remedies, such as some herbal or alternative supplements, is also subject to regulatory warnings due to concerns over quality control and potential risks to infants.

Recent Clinical Evidence

Research Evidence / Overview of Studies for Colic


Evidence Exploring Research Outcomes in Infant Colic

This section will summarize the types of clinical studies, such as randomized controlled trials and observational studies, that have was studied for various interventions examining patient-reported experiences of excessive crying in a healthy baby, which is a condition characterized by fluctuating or episodic manifestations known as infant colic.

Research has explored short-term symptom changes related to the amount of time infants spend crying. Studies focusing on outcomes related to observed distress have been was evaluated in settings where symptoms become more noticeable. These studies help show what has been observed so far, often monitoring specific time intervals to see how crying patterns evolved in the observed populations. Some studies have was observed in that certain behavioral or dietary interventions may be associated with changes in these patterns, particularly within the first few weeks or months.

However, the evidence quality varies across studies, and many findings are mixed. Research examines temporary physiological imbalance, but consistent findings across all infants remain challenging to establish. Findings indicate that the way caregivers report the crying experience—a key element of colic research—can itself be a factor in the study results.


Research Examining Outcomes Related to Different Intervention Types for Colic

This section will outline the existing research evidence for distinct categories of interventions used to address infant colic symptoms, such as dietary modifications, behavioral strategies, and probiotic supplements, presenting an overview of the relative quality and consistency of the study results for each type.

Interventions like certain probiotics was studied for their potential to influence outcomes related to functional balance observed in infants. These studies typically monitored specific probiotic strains for a defined time interval during the period of heightened symptom activity. The data show patterns related to changes in crying duration were observed in some studies using specific bacterial strains, contributing to understanding short-term changes. However, results may not be consistent for all types of probiotics, and comparative evidence is lacking between different preparations.

Behavioral approaches, such as certain routine or soothing techniques, was evaluated in observational settings evaluating daily-life functioning. Research explored the impact of these strategies on outcomes reflecting daily functioning or activity level for both the infant and the parents. These studies help contextualize how parents reported their experience, but results apply only to the populations studied, and the ability to compare these findings directly to clinical trials of supplements may be challenging.


Long-term Studies and Follow-up for Colic

This section will summarize the current understanding and available data from studies that have tracked infants with colic over an extended period to assess their long-term developmental outcomes and the durability of any short-term response to interventions.

Most research was studied for infant colic has focused on short-term symptom changes, often lasting only a few weeks, which is relevant in trials assessing short-term or episodic symptom patterns. Consequently, long-term effects are not fully established, and follow-up durations were limited. Research describes how symptoms evolved in the observed populations, but whether any initial changes are sustained long after the intervention has stopped is still uncertain.

There is limited information for long-term outcomes regarding the general development of children who experienced colic as infants, and this research primarily focuses on outcomes related to systemic or functional imbalance that may evolve later in childhood. The evidence highlights what is known—and what is still uncertain—about long-term patterns, and research does not determine whether an individual will respond similarly over the extended term.


Research Exploring Outcomes in Specific Infant Groups

This section will outline what research exists regarding the effectiveness and safety of colic interventions in specific infant populations, such as premature babies, infants with concomitant gastrointestinal issues (e.g., reflux or allergies), or those where evidence is currently limited.

Research examined different types of interventions in certain special populations that may present with conditions involving periods of heightened symptoms related to underlying causes other than typical colic. For example, specific formulas or dietary changes have was evaluated in infants with a high degree of outcomes linked to inflammatory or irritative states.

However, data for certain groups remain insufficient. For premature babies or infants with existing comorbid conditions, evidence is limited, and sample sizes were modest in studies that included these subgroups. Subgroup findings are uncertain, and research provides context but not individual predictions for these groups.


What is Still Uncertain About Colic Research

This section will synthesize the main evidence gaps, conflicting findings, and areas where more research is needed to better understand the causes of colic, predict which infants will respond to which treatments, and develop more consistent, definitive guidance for families and healthcare providers.

A significant gap in the evidence is the lack of consistency in how colic is defined and how outcomes describing episodic or acute changes are measured. This means certainty remains low in certain areas. Findings were mixed across different studies, making it difficult to draw broad conclusions about the most effective approaches.

Comparative evidence is lacking to clearly show how one intervention performs against another, with many studies only comparing an intervention to a placebo or no treatment. Data are still emerging for many newer strategies, and research is ongoing to better understand the many factors that may contribute to this condition associated with acute or disruptive episodes.

Key Studies & References

  1. The Rome IV Criteria for Functional Gastrointestinal Disorders: Childhood Functional Gastrointestinal Disorders: Neonate/Toddler

Frequently Asked Questions (FAQ)

Common questions about Colic (FAQ)

Q: What is the main definition of colic?

A: Colic is generally defined as frequent, prolonged, and intense crying or fussiness in an otherwise healthy infant. A common criterion used by researchers is the "rule of threes": crying for more than three hours a day, at least three days a week, and for more than three weeks.


Q: What are the typical behaviors associated with colic?

A: Behaviors that are commonly associated with episodes of colic often include an infant's legs being pulled up toward the abdomen, the back arching, and passing gas. These crying episodes frequently start and stop without any clear cause. The crying is usually loud and high-pitched.


Q: How long does colic typically last in infants?

A: Colic symptoms typically start around two to four weeks of age, often peak around six weeks, and generally resolve on their own. Most infants cease to show colicky behavior by three to four months of age, with resolution occurring in nearly all affected infants by six months of age.


Q: What are the potential causes of colic according to medical research?

A: The exact cause of colic is currently unknown and is the subject of ongoing research. Several theories exist, and it is likely that colic results from multiple interacting factors. Potential factors under investigation include:

  • Gastrointestinal issues: Including gas, differing gut bacteria, or sensitivities to certain foods in the infant's diet or the mother's diet (if breastfeeding).
  • Developmental factors: Including the infant's still-developing nervous or digestive systems.
  • Psychosocial factors: Including parental anxiety or difficulty interpreting the infant's cues.

Q: Does medical evidence suggest any specific treatment can cure colic?

A: No specific treatment has been scientifically proven to consistently cure colic for all infants. Because colic often resolves on its own, research focuses on management strategies to help infants and parents cope with the symptoms. Research is limited, and strategies may work for some infants but not others.


Q: Are there non-medication strategies for managing colicky crying that have been studied?

A: Yes. Researchers have studied several non-medication interventions aimed at managing crying associated with colic. These strategies may involve changes to feeding, swaddling, or gentle motion and sounds. For instance, reducing environmental stimulation or ensuring the baby is fed in an upright position are two common approaches noted in some studies.

How should Colic be stored and disposed of?

Official Storage and Disposal Requirements

Prescribing information strictly defines how the antispasmodic medicine (Homatropine/Hyoscine) must be stored and discarded. The tablets must be stored at a temperature below 30°C (86°F), while the injection solution must be stored not above 25°C (77°F).

To ensure product quality, the medicine must be protected from light and should be kept in the original outer carton. For the injection solution, stability requires that the product be used immediately after the ampoule is opened, and any unused remainder must be discarded.

Regulatory documents mandate that the medicine must be kept out of the sight and reach of children for safety.

Disposal must not occur via wastewater or with general household trash. Unused or expired medication must be disposed of through a pharmacy take-back scheme or according to local requirements.

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

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