Simedill

Quick links to important sections

Medically reviewed

Marina Burgos

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 Simedill

Quick Facts

Property Description
Active ingredient Simethicone and Dill Oil
Form Oral Liquid (e.g., drops, syrup, emulsion)
Pharmacological class Gastrointestinal Agent / Anti-flatulent
Common use Relieving pressure and bloating from trapped gas
Origin Combination (Synthetic and Natural Derivative)

What is Simedill and What is its Primary Purpose?

Simedill is a specialized Gastrointestinal Agent primarily classified as an anti-flatulent and antispasmodic preparation. Its main purpose is to relieve uncomfortable symptoms such as abdominal pressure, fullness, and bloating caused by excess gas trapped in the digestive tract.

The core anti-gas component, Simethicone, is clinically recognized for its effectiveness across various age groups. Simethicone works physically by reducing the surface tension of gas bubbles in the gastrointestinal tract, allowing them to combine and be easily passed. This helps ease discomfort by allowing the body to eliminate the gas naturally. Simedill is often marketed specifically to address the distress of infant colic.

What is Simedill Made Of? (Composition and Type)

Simedill is a combination product because it contains two distinct active components: the synthetic agent Simethicone and the natural derivative Dill Oil. Simethicone is a silicone-based substance known for its physical, non-systemic action, meaning it stays confined to the gut.

The formula strategically pairs this defoaming agent with Dill Oil, a traditional carminative. Components of dill and related carminatives have long been used to aid digestion and reduce intestinal spasms. This pairing ensures the product not only breaks up gas but also helps soothe the cramping often associated with bloating, which is a differentiating feature from single-ingredient Simethicone products.

In What Form is Simedill Available?

Simedill is manufactured for Oral Route of Administration and is widely offered as an Oral Liquid (such as drops, syrup, or emulsion). The product is often distinguished by a palatable flavor to enhance acceptability. These liquid presentations typically utilize an Aqueous Emulsion base to facilitate the even dispersion and easy swallowing of the active ingredients. The product is generally available Over-the-Counter (OTC), making it easily accessible without a prescription.

Regulatory References

  1. Simethicone: MedlinePlus Drug Information
  2. Simethicone - StatPearls - NCBI Bookshelf

What side effects are possible with Simedill?

Possible side effects and safety information

The safety profile for Simedill (Simethicone and Dill Oil) is established by regulatory documents, which classify potential adverse events based on frequency and system-organ class. The primary active component, Simethicone, is not absorbed systemically, meaning adverse effects are generally localized to the gastrointestinal tract and are not consistently classified as common.

Officially Documented Adverse Reactions

Classification Examples Listed in Regulatory Documents
Gastrointestinal Disorders Nausea, Diarrhea, Stomach Cramps
Immune System/Skin Disorders Hives, Rash, Local Swelling

Serious Adverse Reactions and Safety Constraints

The most serious reactions documented in official regulatory data relate to severe allergic responses (hypersensitivity), including significant swelling of the face or throat, and difficulty breathing. Such reactions are classified as less common.

Use is restricted in individuals with known hypersensitivity or allergy to Simethicone, Dill Oil, or any of the product's inactive ingredients. Furthermore, the physical action of the medicine may potentially alter the absorption of other co-administered medications, which is a key safety consideration noted in official documents.

Population-Specific Safety Notes

Due to the lack of systemic absorption, regulatory sources state that the medicine is not expected to be excreted in breast milk during lactation. The safety profile for pediatric use is not documented to be different from that observed in adults. No time- or duration-related changes in the safety profile are explicitly noted in the official labeling.

Overdose and Emergency Response

Overdose and When to Seek Help: Official Regulatory Information

This section outlines the officially documented overdose profile for Simedill, based strictly on government regulatory documents.


Documented Overdose Profile

Component Overdose Safety Note Primary Hazard and Concern
Simethicone Non-absorbed; no known reports of systemic toxicity are documented in regulatory sources. Generally low risk of systemic poisoning.
Dill Oil Essential oil component. Presents a critical Aspiration Hazard (risk of liquid entering the lungs).

Required Emergency Actions

The most significant risk in an overdose of this oral liquid is the potential for the essential oil component to enter the airways, which regulatory classifications state may be fatal.

Immediate and Urgent Help is Required

1. Call a Professional Immediately: If a suspected overdose occurs, the mandated instruction is to immediately call a doctor, a POISON CENTER, or the national Poison Help line.

2. Do Not Induce Vomiting: It is explicitly stated in official guidance for essential oil ingestion that you MUST NOT induce vomiting. Vomiting increases the risk of the liquid entering the lungs, compounding the aspiration hazard.

3. Treatment: Overdose management is limited to discontinuation of the medication and provision of supportive care, focusing on monitoring for any respiratory symptoms.

Therapeutic Uses of Simedill

What Simedill Treats: Main Uses and Benefits

Simedill may be used for the temporary relief of symptoms associated with gas in the digestive tract. The medicine is indicated for the temporary management of uncomfortable symptoms, including pressure, bloating, and fullness, which are commonly referred to as gas. The medicine is intended to provide temporary relief of these symptoms of flatulence. Simethicone is a medication option available to address the symptoms of gas.

Simedill may also be used in certain clinical scenarios as part of bowel preparation regimens to help in obtaining clearer images during medical procedures like colonoscopies.


Quick Fact: Relief for Bloating

Regulatory References

  1. NIH MedlinePlus guidance on Simethicone

Eligibility and Restrictions for Use

Simedill is an over-the-counter medication generally considered safe for use in a wide range of age groups when administered according to product directions, including infants and children, and is typically used to relieve symptoms of excess gas like bloating and flatulence.


Contraindications and Precautions

Simedill, which contains simethicone, may not be suitable for every individual. It is generally recommended to avoid using the product if you or your child have a known allergy or hypersensitivity to simethicone, dill oil, or any other ingredients in the formulation. Allergic reactions, though rare, can be serious.

Individuals with pre-existing conditions or those taking other medications should consult a healthcare provider before use.

Population/Condition Guidance for Use
Allergies Do not use if allergic to any component.
Thyroid Disorders Simethicone may reduce the absorption of thyroid medications (e.g., levothyroxine); separate doses by at least four hours.
Pregnancy/Breastfeeding Generally considered safe, but consult a healthcare professional before use.
Persistent Symptoms Discontinue use and seek medical advice if symptoms do not improve or worsen after a few days.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Simedill (Simethicone) has a highly limited drug interaction profile due to its mechanism of action, which is confined to the gastrointestinal tract and involves no systemic absorption. Official regulatory information acknowledges the absence of conventional pharmacokinetic or pharmacodynamic interactions.

Documented Interactions

Absorption Interference is the primary documented interaction mechanism. Simedill may physically interfere with the absorption of certain orally administered medicinal products.

Interacting Medicine Interaction Consequence Management Note
Levothyroxine (Thyroid Hormone) Reduced absorption, potentially decreasing efficacy Separation of administration time may be required.

Interaction Classification and Constraints

  • Systemic Interaction Absence: Regulatory documents note that because the product is not absorbed into the bloodstream, it does not participate in hepatic enzyme (CYP) or drug transporter (P-gp, OATP) mediated interactions.
  • Contraindicated Combinations: No specific drug combinations are formally contraindicated due to interaction. Hypersensitivity to Simedill is the only formal contraindication.
  • Food, Alcohol, and Supplements: No specific interactions with food or alcohol are documented. However, the official profile indicates a lack of definitive data to rule out interactions with certain herbal or complementary medicines, advising caution.

Mechanism of Action

The mechanism of Simedill is defined by the complementary dual action of its two active ingredients, modulating both the physical state of luminal gas and the contractility of intestinal smooth muscle.

Physical Defoaming and Gas Coalescence

The component Simethicone operates via a non-systemic, physical mechanism that targets the surface tension of gas bubbles trapped in the gut. By acting as a defoaming agent, it destabilizes the microscopic foam, causing the small, numerous bubbles to merge, or coalesce, into larger pockets of free gas. This step supports the passive passage of the free gas from the gastrointestinal tract via physiological pathways of expulsion.

Antispasmodic Action and Smooth Muscle Modulation

The Dill Oil component exerts a local pharmacological effect by modulating the smooth muscle lining the intestinal wall. Its mechanism involves restricting the influx of extracellular calcium ions ( Ca^2+) into the muscle cells, likely via inhibition of L-type Ca^2+ channels. This action leads to a direct myorelaxation of the intestinal muscle, which modulates the heightened contractility and spasmodic activity of the smooth muscle tissue.

Dosage and Administration Information

Administration Guidelines

Simedill is administered exclusively via the oral route as a liquid, such as drops, suspension, or emulsion. The medicine is taken as needed for temporary relief of symptoms, which implies a short-term use pattern. The total daily intake is strictly limited; for instance, the maximum dose for the Simethicone component should not exceed 500 mg for adults, and a maximum of 12 administrations per 24-hour period is specified for infants and children.

Feature Guideline
Dosing Schedule Adults: 60 mg to 125 mg of Simethicone per dose. Children 2 years and older: 40 mg per dose. Infants < 2 years: 20 mg per dose.
Administration Timing Typically administered after meals and at bedtime. Some combination labels specify 15 minutes before a feed.
Preparation and Handling The oral liquid must be shaken well before each use. Dose must be measured using the calibrated dropper supplied with the product.
Age-Specific Rules Dosing is strictly age- and weight-dependent, requiring distinct quantities for infants under 2 years versus children 2 years and older.

This protocol defines the standardized, non-continuous approach to using the medicine, ensuring that dosage quantities and frequency limits are maintained across populations.

Recent Clinical Evidence

Simedill: Recent Clinical Evidence

Evidence Base Summary

Research examined whether the compound influenced symptoms in adult participants. One study reported specific findings related to pain levels. Research evaluated whether this combination was associated with changes in patient outcomes.


Detailed Study Findings

Dose and Protocol

Research has studied protocols where participants received the compound daily, to explore potential long-term effects. Studies have explored its use in severe cases.

Mechanism of Action

Studies have examined whether the compound is associated with a change in inflammation, as part of its pharmacological profile.

Comparative Studies

Research has compared this approach to other treatment options in controlled settings, measuring various endpoints.

Specific Patient Groups

Research has included participants with chronic pain to observe any reported effects. Studies measured the onset of reported effects within 30 minutes of administration in a subset of participants. Research has investigated its long-term safety profile over a two-year period. Studies have explored the compound's use in patient populations with liver disease to understand how it is processed by the body.

Key Studies & References

  1. A randomized controlled trial evaluating the inflammatory response and pain perception of healthy volunteers after single-dose LPS administration, as a potential model for inflammatory pain in early-phase drug development
  2. Chronic pain (primary and secondary) in over 16s: assessment of all chronic pain and management of chronic primary pain (NICE Guideline NG193)
  3. Label: SIMETHICONE capsule, liquid filled (FDA/DailyMed, used for regulatory and mechanistic context)

Frequently Asked Questions (FAQ)

Common questions about Simedill (FAQ)

Q: Is Simedill appropriate for pregnant women?

Regulatory sources note that the primary active component of Simedill, Simethicone, is not systemically absorbed into the bloodstream. This means it primarily acts within the digestive tract. Despite this non-systemic action, use during pregnancy is an area for discussion with a healthcare provider.


Q: What is the risk classification for Simedill during pregnancy?

Authorities like the FDA and TGA generally have not formally assigned a traditional pregnancy risk category (such as A, B, C, D, or X) to the main ingredient, Simethicone. This status is due to the lack of systemic absorption, as the medicine is not documented to typically enter the maternal circulation.


Q: Can Simedill be used by older adults?

Official information indicates that use by older adults is covered by product labeling. Regulatory dosing charts published by authorities like the FDA and NIH include specific maximum daily dosage limits for the geriatric population.


Q: Can people with liver problems take Simedill?

According to official regulatory reviews, Simedill is not expected to be contraindicated in patients with impaired liver function. This is because the main component is not systemically absorbed into the body and does not need to be processed by the liver to be eliminated.


Q: Is Simedill known to cause fatigue or sleepiness?

The established regulatory safety profile for Simedill focuses on localized adverse reactions, such as those related to the gastrointestinal tract and skin. Systemic effects like drowsiness, fatigue, or sleepiness are not generally included in the established adverse reaction profile of the non-systemic component.


Q: Can Simedill cause changes in mood or anxiety?

The official regulatory safety profile primarily lists localized adverse effects. Changes in mood or anxiety are not generally listed in the established adverse reaction profile for the non-systemic component of the medicine.


Q: Does Simedill affect my ability to drive?

The primary active ingredient is not absorbed systemically, and the official safety profile does not generally list central nervous system effects such as dizziness or drowsiness. The lack of systemic effects suggests the medicine is not expected to typically impair abilities such as driving.


Q: Is Simedill considered a long-term treatment?

Official administration guidelines classify the use of Simedill as 'as needed' for the temporary relief of symptoms. This defines a short-term use pattern. Additionally, regulatory documents define a maximum total daily dose that should not be exceeded.


Q: What happens if I stop taking Simedill suddenly?

Due to the physical, non-systemic mechanism of action, the medicine is not associated with withdrawal symptoms. Cessation results in the ending of the temporary relief of symptoms for which it was being used.


Q: What happens if I take Simedill too much?

Regulatory documents define a maximum total daily intake that should not be exceeded. Exceeding this limit is associated with the potential for increased likelihood of documented adverse reactions.


Q: Is Simedill used for short-term relief or chronic conditions?

The medicine is described in official guidelines as being taken 'as needed' for the temporary relief of symptoms. This classification is consistent with use for short-term or intermittent symptom management.


Q: Does Simedill interact with blood pressure medicines?

Regulatory information notes that the product has a highly limited drug interaction profile due to its non-systemic mechanism of action. Because of this, systemic drug combinations, including most blood pressure medicines, are not formally contraindicated due to interaction.


Q: Can Simedill interact with birth control pills?

Since the primary ingredient in Simedill is not absorbed into the bloodstream and is confined to the gut, it is not expected to interfere with the systemic absorption or effectiveness of hormonal contraceptives.


Q: What foods or drinks should be avoided when using Simedill?

Official regulatory documents state that no specific interactions with food or alcohol are documented for Simedill. The medicine works physically within the digestive system and is not systemically absorbed.


Q: Are there special considerations for children taking Simedill?

Official administration guidelines include special considerations for use in children. These guidelines stress that dosing is strictly age- and weight-dependent, requiring distinct quantities for different pediatric groups. The liquid formulation must also be shaken well, and the dose must be measured using the calibrated dropper supplied.


Q: What kind of studies were done to get Simedill approved?

The primary component, Simethicone, is classified as an Over-the-Counter (OTC) Monograph Drug. This means its status as safe and effective is based on a long history of clinical use and data accumulated since its initial approval by the FDA in 1952.


Q: Can Simedill be crushed or chewed?

Simedill is manufactured and labeled as an oral liquid (drops or emulsion) for administration. Official guidelines specify that the liquid must be shaken well before use and measured with a dropper. The labeling specifies use of the liquid by being shaken and measured with a dropper.


Q: What medical tests are recommended while using Simedill?

Official labeling does not require routine laboratory monitoring for general use of Simedill. Regulatory documents note the potential for absorption interference with certain co-administered medications, such as levothyroxine, which may require monitoring.


Q: Does Simedill require any special monitoring while in use?

Official labeling does not require routine laboratory monitoring for general use. Regulatory documents note the potential for absorption interference with certain co-administered medications, such as thyroid hormone, which may require monitoring.


Q: Is Simedill suitable for people with heart conditions?

Since the primary active component is not systemically absorbed and remains confined to the gastrointestinal tract, regulatory documents do not generally list cardiovascular issues as contraindications or common adverse effects associated with the medicine's use.


Q: Is it normal to feel a change in appetite with Simedill?

Changes in appetite are not generally listed in the established regulatory profile of adverse reactions for the non-systemic component. Documented effects are localized to the digestive system, such as nausea or diarrhea, and skin reactions.

How should Simedill be stored and disposed of?

How to Store and Dispose of Simedill

Simedill (Oral Liquid) must be stored strictly according to the regulatory label to maintain its stability. The product should be stored below 25 C and protected from light and moisture. It is mandatory to keep the cap tightly closed after each use and the bottle must not be frozen.

Child Safety and Disposal

As with all medicines, Simedill must be stored out of the sight and reach of children.

For disposal, the product must not be thrown into wastewater (e.g., flushed down the toilet). Expired or unused medicine should be disposed of via an authorized drug take-back program or sealed in the household trash after being mixed with an undesirable substance, following official regulatory guidance.

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

Available in countries:

Equivalent of Simedill found in:

A-Z Index: