Calendula

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Calendula

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Treatment option: Hemorrhoids

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 Calendula

Quick Facts

Property Description
Active Ingredient Calendulae Officinalis Flores (Marigold flowers)
Pharmacological Class Phytopreparation, Herbal Medicine
Form Tincture, Ointment, Infusion, Liquid Extract
Common Use Topical application for supporting minor skin and mucosal health
Origin Botanical (Non-synthetic, derived from Calendula officinalis)

1. Identity and Origin: Defining Calendula

Calendula is defined as a specialized phytopreparation derived from the whole or fragmented flowers of the Marigold plant, known scientifically as Calendulae Officinalis Flores. This material is recognized by regulatory bodies as a traditional herbal medicinal product. Its identity is rooted in its definitive botanical origin, distinguishing it as a non-synthetic plant-derived agent whose use is based on documented application. The unique color of the flower is due to its high concentration of specific Carotenoids.

2. Compositional Basis and Common Forms

The preparation's general action is determined by a complex profile of active ingredients, primarily including various Triterpene saponins and Flavonoids, alongside other constituents. The anti-inflammatory property is clinically recognized to be largely driven by specific triterpenoids, such as faradiol monoesters. These constituents are extracted and prepared in common high-level dosage forms, notably as a tincture (alcohol base), an ointment (lipophilic base), or an aqueous infusion. These forms are exclusively designed for the topical or mucosal route of administration.

3. General Function and Classification as a Topical Agent

The overall general purpose of the Calendula preparation is to function as a supportive topical agent for the skin and mucous membranes. The collective properties of the active ingredients facilitate the modulation of local response and promote skin barrier support. This classification confirms the preparation’s use in supporting local tissue comfort and the maintenance of healthy external tissue function, for instance, when treating minor surface irritations like dry, chapped skin.

Regulatory References

  1. NIH LactMed on Calendula

What side effects are possible with Calendula?

Possible Side Effects and Safety Information

The official safety profile for topical Calendula preparations is primarily centered on localized reactions affecting the skin. These potential adverse reactions are formally classified within government regulatory documents under Immune System Disorders and Skin and Subcutaneous Tissue Disorders.


Adverse Reaction Scope

The most commonly documented adverse reactions include hypersensitivity reactions and allergic contact dermatitis. These effects are recognized as localized immune responses to the active substance, Calendula officinalis, or other related plant constituents.

Classification Feature Regulatory Status
Adverse Reaction Category Hypersensitivity and Local Allergic Responses
Frequency Classification Not Known (cannot be reliably estimated from available data)
System-Organ Class Skin and Subcutaneous Tissue Disorders
Serious Reactions Not commonly documented in regulatory texts for topical traditional use

Population-Specific Safety Considerations

Safety constraints are defined based on pre-existing conditions and population groups where data is limited:

  • Hypersensitivity: The use of Calendula is formally contraindicated in individuals with a known allergy to the active ingredient or to plants belonging to the Asteraceae/Compositae family (e.g., chrysanthemums, ragweed).
  • Pregnancy and Lactation: Due to a lack of sufficient data to establish safety, the use of Calendula preparations is not recommended during pregnancy or breastfeeding.
  • Pediatric Use: Safety for use in children under 6 years of age has not been established for topical applications, leading to official recommendations against general use in this age group.

Overdose and Emergency Response

The official regulatory profile for overdose of topical Calendulae Officinalis Flores preparations is strictly defined by its classification as a low-risk, traditional herbal medicinal product. Regulatory authorities, including the European Medicines Agency (EMA), formally designate the detailed Overdose section in the core safety data as Not Applicable.

This regulatory classification determines the scope of information available for overdose. Consequently, the official labeling does not contain documented listings of specific clinical signs, symptoms, or adverse physiological manifestations that would result from systemic overdose.

Due to the product's low systemic toxicity profile when used as directed, the regulatory documents do not mandate specific emergency actions or provide unique instructions regarding when to seek immediate medical help for an overdose event. Furthermore, the label does not specify the existence of a specific antidote or list required supportive and symptomatic management measures.

The absence of a detailed overdose profile, including symptoms, complications, or mandated emergency actions, reflects the product’s low systemic risk profile as assessed by government health authorities.

Therapeutic Uses of Calendula

What Calendula Treats: Main Uses and Benefits

The primary therapeutic role of Calendula preparations is providing topical support and symptomatic relief across several non-severe external conditions. Its use is based on documented application and therapeutic tradition for certain uses. Its application is aligned with symptom patterns that require gentle support for healing and soothing local discomfort, which contributes to easing distress during periods of heightened symptoms.


Key Areas of Symptom Management

Calendula is commonly applied for supportive therapeutic benefit across conditions involving minor tissue disruption, such as superficial cuts, grazes, minor wounds, and skin abrasions. It is also relevant for managing symptoms of local irritation, including redness and stinging, and for easing discomfort associated with pronounced chapping and dryness. The preparation contributes to easing symptoms related to the skin's surface and helps address groups of symptoms that may appear seasonally or intensify over time.

“Applied in scenarios where additional management of discomfort is required, Calendula contributes to easing the overall symptom load during symptomatic phases.”


Quick Fact: Relief for Local Irritation
Symptom Category Symptoms related to inflammatory or irritative states
Common Scenario Relevant for minor injuries, chapping, and dry skin fissures
Benefit Focus Supports day-to-day comfort and assists with maintaining functional stability

Eligibility and Restrictions for Use

The official regulatory classification for Calendula officinalis preparations defines eligibility through specific exclusions and age-related limitations, as documented by national health authorities.


Absolute Non-Eligibility

Use is absolutely contraindicated in populations with a known hypersensitivity or allergy to the active substance, Calendula officinalis. This restriction also applies to individuals with an allergy to other plants belonging to the Asteraceae (Compositae) family, which includes species such as ragweed, chamomile, and chrysanthemums.


Restricted and Conditional Use

Use is not recommended for several populations where safety data is considered insufficient, as defined by official labeling:

  • Pregnancy and Lactation: Use is not recommended during either pregnancy or breastfeeding, as adequate safety information has not been established.
  • Pediatric Age Limits: For skin preparations (cutaneous use), the medicine is not recommended for children under 6 years of age. For preparations used in the mouth or throat (oromucosal use), the medicine is not recommended for children under 12 years of age.
  • Other Conditions: Official labeling does not document specific restrictions based on conditions such as hepatic impairment or renal impairment.

The medicine is considered permitted for use by Adults, Older Adults, and Adolescents above the regulatory-defined minimum age thresholds for each route of administration.

What should I know about interactions with other medicines?

The regulatory interaction profile for Calendula is structured primarily by the official documentation available for its established use as a topical or oromucosal preparation. The overall profile confirms a limited scope of interaction constraints as described by government authorities.

Detail Official Regulatory Statement
Medicinal product categories with documented interactions Sedative Agents (CNS depressants).
Mechanistic basis of interactions Pharmacodynamic interaction (additive effects).
Interaction-related restrictions Caution advised with co-administration of sedative agents due to potential for additive effects.

Official Interaction Statements

Official regulatory assessments for topical Calendula preparations do not report any clinically relevant pharmacokinetic interactions that would alter the clearance or systemic exposure of other co-administered medicinal products. This absence of reported metabolic or transporter interactions aligns with the product's non-systemic route of administration.

  • The sole interaction caution involves a pharmacodynamic interaction with other sedative agents. Regulatory summaries document the potential for an additive sedative effect when Calendula is used in a form that could lead to systemic exposure.
  • No combinations are formally classified as contraindicated in the official regulatory documentation for the topical or oromucosal preparations.

Connection to the Overall Interaction Profile

Regulatory documents define the product’s interaction structure as having limited risk, consistent with its primary localized use. Official labeling does not establish any mandatory timing or separation requirements for administration, nor does it list specific interactions with food, alcohol, or other herbal products. The profile is therefore defined by the absence of major reported pharmacokinetic constraints.

Mechanism of Action

The mechanism of action for Calendula officinalis is governed by a mechanistic synergy between its primary constituents, triterpenoids and polysaccharides, which influence local physiological pathways. The anti-inflammatory component centers on the enzyme inhibition exerted by triterpenoids like faradiol monoesters. These constituents suppress the activity of Cyclooxygenase-2 (COX-2) and Inducible Nitric Oxide Synthase (iNOS), key enzymes responsible for generating pro-inflammatory mediators. This action modifies the early molecular steps of the inflammatory cascade, influencing the regulation of local vascular responses and limiting the formation of tissue fluid accumulation.

Concurrently, the regenerative mechanism is driven by flavonoids and polysaccharides that promote cellular growth and migration. This process involves stimulating fibroblasts to accelerate the synthesis of collagen and Extracellular Matrix components, alongside enhancing keratinocyte activity for re-epithelization. The state of reduced inflammatory signaling facilitates this progression of cellular proliferation and matrix synthesis, contributing to the structural remodeling of the tissue.

Dosage and Administration Information

Calendula preparations are intended for administration through specific routes as defined by established monographs. The two most common routes are Topical (cutaneous) for application to the skin, and Oromucosal (gargle or rinse) for use in the mouth and throat. Some national regulatory bodies also authorize Oral use for specific internal applications. Dosage forms include liquid extracts, tinctures, and semi-solid preparations such as ointments and creams.

Dosage & Frequency Administration Instruction
Infusion Preparation Requires 1–2 grams of dried herbal substance in 150 ml of boiling water.
Tincture/Compress Tinctures must be diluted (e.g., at least 1:3 with water) before use as a compress or gargle.
Dosing Schedule Applied or administered 2 to 4 times daily.
Duration Rule If symptoms persist after 1 week (7 days) of use, consultation with a qualified health practitioner is required.

Strict procedural rules govern administration. Oromucosal preparations used as a gargle or mouthwash must not be swallowed. The use of these preparations is not recommended for children under 6 years of age for topical administration or under 12 years of age for oromucosal use, based on the lack of established data in these specific pediatric populations. These requirements define a structured, short-term administration protocol.

Recent Clinical Evidence

Research Focus: Radiation-Associated Skin Reactions

Clinical short-term Randomized Controlled Trials (RCTs) have studied Calendula in populations of adult women undergoing radiotherapy for breast cancer. These studies monitored clinical measurements like the severity of skin reactions and patient-reported outcomes describing perceived discomfort. Some comparative trials reported measurements where a lower incidence of severe dermatitis was observed in some studies, but findings varied relative to different control agents. The results apply only to the populations studied, and long-term effects are not fully established as follow-up durations were limited.

Research Focus: Minor Skin Injuries and Healing

The research base for minor wounds, such as superficial cuts and abrasions, includes limited RCTs and systematic reviews, often supported by Traditional Use Data. Studies examined outcomes related to physical discomfort and the rate of wound closure in cohorts including post-operative patients. Findings were mixed and highly heterogeneous, reflecting differences in preparation and wound type. Evidence is limited for generalized, minor wounds, and there is a scarcity of high-quality RCTs focusing on common abrasions.

Research Focus: Local Skin and Mucosal Discomfort

The use of the preparation for minor skin irritation (like chapping and dryness) and minor mouth/throat discomfort is primarily supported by Traditional Use Data accepted by regulators. These reports and limited trials explored patient-reported outcomes for soreness, stinging, and discomfort. The primary regulatory classification for these uses is based on long-standing documentation of application over many decades. Data for children, in particular, remain insufficient.

Understanding Current Research Gaps and Uncertainty

Research on Calendula contributes to the broader evidence landscape, but evidence highlights what is known — and what is still uncertain. Sample sizes were modest in many trials, and evidence quality varies across studies. For all indications, long-term effects are not fully established, and comparative evidence is lacking against many modern alternatives. The research does not determine whether an individual will respond similarly, as findings describe group patterns, not personal outcomes.

Frequently Asked Questions (FAQ)

Common questions about Calendula (FAQ)


Q: Is Calendula the same thing as Marigold?

Yes, regulatory and official medical documents identify the active substance as Calendulae Officinalis Flores. This is the scientific name for the specific species commonly known as Pot Marigold or Marigold flowers. Therefore, the medicinal preparation is derived from the flowers of this particular Marigold plant.


Q: Can I use a Calendula product that has expired?

Official guidance for medicinal products generally advises against the use of any product that has passed its expiration date. This is in line with maintaining product quality and adhering to labeled specifications. Expired Calendula products should be disposed of following local regulations, such as utilizing a medicine take-back program.


Q: What should I do if my skin reaction worsens after using Calendula?

If a skin reaction, such as increased redness or irritation, is observed or worsens, official safety principles indicate that use of the product should cease. Furthermore, regulatory administration guidelines advise that if the original symptoms persist after one week of use, consultation with a qualified health practitioner is required.


Q: Is it true that Calendula can be taken by mouth as well as applied to the skin?

Official regulatory texts confirm that authorized uses include Topical (application to the skin) and Oromucosal (gargle or rinse in the mouth/throat). Some national authorities also recognize Oral use for specific internal traditional applications. However, most common preparations are exclusively intended for localized external use.


Q: What is the main difference between Calendula cream and an ointment?

Regulatory documents list both creams and ointments as authorized semi-solid dosage forms. The general difference lies in their physical base: creams are typically water-based and absorbed more quickly, while ointments are usually oil-based (lipophilic) and form a thicker layer on the skin, which helps them remain in place longer.


Q: Can I use Calendula for a long time, or is it only for short-term use?

The official administration instructions for Calendula preparations define a structured, short-term use protocol. The product is authorized for traditional use in supporting minor issues. Regulatory guidelines specify that if symptoms persist or do not show improvement after 7 days of use, consultation with a qualified health practitioner is required.


Q: Are all parts of the Calendula plant used in medicinal products?

No. The official medicinal product, as defined by regulatory bodies like the European Medicines Agency, is a specialized phytopreparation derived specifically from the whole or fragmented flowers of the Marigold plant (Calendulae Officinalis Flores). The stems and leaves are not generally included in the authorized preparations.


Q: Why is Calendula sometimes listed as a colorant in ingredients lists?

The bright yellow-orange color of the Calendula flower is due to its high concentration of natural pigments called Carotenoids. Extracts from the plant are recognized by regulatory bodies in some regions as permitted natural colorants, meaning they can be added to products to achieve a specific hue.


Q: Why is Calendula often included in products for babies?

Calendula has a history of traditional use for supporting minor skin irritation, such as mild redness and chapping. However, regulatory safety data for topical use is not established for children under 6 years of age, which leads to official non-recommendation for this younger age group.


Q: How is Calendula regulated in the US versus in Europe?

The regulatory classification varies by region. In Europe, many preparations are classified as Traditional Herbal Medicinal Products (THMP) by agencies like the EMA, relying on documented long-standing use. In the US, the classification can vary, with products potentially falling under categories like homeopathic remedies, cosmetics, or sometimes non-prescription drugs, depending on their claims and strength.


Q: Can I apply Calendula to my lips?

Yes, official regulatory texts indicate that the preparation is authorized for Topical application to the skin and Oromucosal use in the mouth or throat. This confirms that the formulation is generally suitable for application to external mucous membranes, such as the lips.

How should Calendula be stored and disposed of?

Official Storage and Disposal Requirements

Calendula preparations must be stored according to regulatory labeling to maintain stability and ensure safety. The product should be kept at room temperature, typically defined as 20 C to 25 C.

Storage Conditions

  • Environmental Protection: Keep the product out of direct sunlight and heat to prevent degradation.
  • Container Rules: Store the medicine in the original container and ensure the cap is tightly closed after each use. Do not use the product if the seals are broken.
  • Safety: Products must be stored out of the sight and reach of children.

Disposal Instructions

Unused or expired Calendula should be disposed of in accordance with local regulations. It must not be flushed down the toilet or poured into drains. Follow guidelines for household trash disposal, often involving mixing the product with an undesirable substance, or utilize medicine take-back programs where available.

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

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