Atm

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Atm

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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 Atm

Quick Facts

Property Description
Active Ingredients Adapalene, Azithromycin
Form Topical Preparation (Gel or Solution)
Pharmacological Class Retinoid and Macrolide Antibiotic Combination
Typical Use Management of inflammatory and non-inflammatory lesions
Origin Synthetic Compounds

Defining Atm: A Fixed-Dose Combination Agent

Atm is a prescription medicine categorized as a fixed-dose combination product within the wider class of Dermatological Agents. It is specifically formulated as an anti-acne preparation for topical application to the skin. The medication is distinctively positioned for patients who present with both inflammatory and non-inflammatory lesions, making it suitable for a comprehensive approach rather than sequential therapy. The use of retinoid-antibiotic combinations is clinically recognized as a standard therapeutic approach for this condition, supported by pharmacological studies. This combination strategy is designed to simplify the treatment regimen and enhance patient adherence.

Core Composition: Adapalene and Azithromycin

The medication's identity is defined by its two essential active ingredients. Adapalene is a third-generation retinoid, a synthetic compound known for its strong influence on epithelial cell differentiation, differentiating it from older-generation retinoids. Azithromycin is a semi-synthetic macrolide antibiotic that works by inhibiting bacterial protein synthesis. Atm is typically provided as a specific, quick-drying topical dosage form (such as a gel or solution) that aids in targeted dermal delivery, a key factor in maximizing the effectiveness of both synthetic compounds.

The General Purpose of the Dual-Action Mechanism

The general therapeutic purpose of Atm is to deliver synergistic activity that comprehensively manages the underlying causes of the targeted condition. This is achieved through a high-level dual action: the Adapalene component promotes comedolytic activity by normalizing skin cell turnover, while the Azithromycin component exerts local antimicrobial activity. By combining these fundamental actions in a single product, the formulation is pharmacologically proven to provide robust foundational support for clearing existing lesions and inhibiting the formation of new ones, offering a significant advantage in the initial control of the ailment.

Regulatory References

  1. NIH Adapalene Information

What side effects are possible with Atm?

Possible side effects and safety information

The official safety profile for the Adapalene/Azithromycin topical combination is primarily defined by local Skin and Subcutaneous Tissue Disorders. These adverse reactions are classified by regulatory authorities based on their reported frequency in clinical use.


Adverse Reaction Frequencies

Classification Examples of Documented Reactions
Common (may affect up to 1 in 10) Skin irritation, Dry skin, Erythema (redness), Scaling/peeling.
Uncommon (may affect up to 1 in 100) Pruritus (itching), Burning sensation, Contact dermatitis, Initial worsening of acne (Acne flare), Eyelid irritation.

Serious Adverse Reactions and Safety Constraints

The medicine's regulatory documents include specific documentation of Serious Adverse Reactions, classified under Immune System Disorders. These include Severe Allergic Reactions (Hypersensitivity), such as Angioedema, which are rare but require immediate cessation of use. The label also notes the potential for secondary local infection.

Safety considerations for special populations note that due to the retinoid component, use is generally contraindicated or not recommended during pregnancy. Furthermore, a key safety constraint is the mandatory avoidance of exposure to sunlight and artificial UV light during treatment, as the medication may increase photosensitivity.

Time-related safety patterns indicate that local irritation and effects such as dry skin are frequently most pronounced during the initial four weeks of therapy, which is a documented and expected pattern.

Overdose and Emergency Response

Atm Overdose and When to Seek Help

The official regulatory documents specify distinct manifestations and emergency actions associated with overexposure to the components of Atm.


Overdose Manifestations and Risks

Exposure Type Documented Manifestations/Risks
Systemic Overexposure Adverse effects observed at doses higher than recommended include gastrointestinal upset (nausea, vomiting, diarrhea) and prostration. Chronic oral ingestion of the retinoid component can lead to effects similar to excessive Vitamin A intake.
Cardiovascular Risk The macrolide component carries a documented risk for prolongation of the QT interval, which can escalate to the potentially fatal arrhythmia Torsades de pointes. This risk is heightened in patients with existing heart conditions or uncorrected hypokalemia.
Topical Overuse Excessive application of the retinoid component to the skin may result in localized reactions such as marked redness, peeling, or discomfort.

Regulator-Mandated Emergency Actions

In the event of suspected overdose, immediate action is required. Official regulatory guidance mandates that you seek immediate medical attention or call a poison control center right away. Management is based on general symptomatic and supportive measures, as no specific antidote is known. Due to the potential for severe cardiovascular events, clinical monitoring of cardiac function is necessary following systemic overexposure.

Therapeutic Uses of Atm

What Atm Treats: Main Uses and Benefits

The primary therapeutic scope of Atm is the comprehensive management of Acne vulgaris in patients who commonly experience a mix of inflammatory and non-inflammatory symptoms. This combination is relevant in clinical settings where supportive symptom management is appropriate and is aligned with therapeutic domains involving inflammatory or irritative states.

Atm is generally used across conditions characterized by periods of heightened symptoms where the severity is considered moderate to severe. It is commonly used to help with managing both non-inflammatory lesions (e.g., comedones and whiteheads) and inflammatory states (e.g., papules and pustules). It assists with maintaining comfort during symptomatic periods by helping to address existing, visible lesions and is relevant for easing the accompanying redness and tenderness. It also plays a role in managing symptoms related to episodic or fluctuating manifestations, supporting the patient during difficult episodes and contributing to improved comfort during symptomatic periods.


Quick Fact: Relief for Mixed Acne Symptoms

Property Description
Primary Indication Acne vulgaris (moderate to severe)
Symptom Types Inflammatory and Non-inflammatory Lesions
Key Patient Benefit Supports easing overall symptom burden
Use Context Long-term management of recurrent symptoms

Regulatory References

  1. NIH MedlinePlus overview

Eligibility and Restrictions for Use

Eligibility Scope: Who Can and Cannot Use Azithromycin?

The official eligibility profile for azithromycin is strictly defined by government regulatory documents, focusing on absolute exclusions and populations requiring conditional use or special caution.

Category Regulatory Statement on Eligibility
Populations for whom use is contraindicated Patients with a known history of hypersensitivity to azithromycin, erythromycin, or any other macrolide or ketolide drug. Use is also forbidden in patients with a history of cholestatic jaundice or hepatic dysfunction previously associated with azithromycin use.
Age-related eligibility rules Safety and efficacy have not been established for most indications in infants under six months of age. For pharyngitis/tonsillitis, use is not established for children under two years of age. Special caution is advised for neonates (up to 42 days of life) due to the risk of Infantile Hypertrophic Pyloric Stenosis (IHPS).
Condition-specific eligibility rules Use requires caution and restriction in individuals with a known prolongation of the QT interval or other proarrhythmic conditions (such as uncorrected hypokalemia or severe cardiac insufficiency), due to the risk of heart rhythm abnormalities. Caution is also advised in patients with severe renal impairment and those with myasthenia gravis, as the medicine may exacerbate muscle weakness.

Eligibility is primarily determined by the absence of these absolute and conditional contraindications, allowing use in adults and older pediatric patients as defined by official labeling.

What should I know about interactions with other medicines?

Interactions with other medicines and products

The interaction profile for Atm is primarily defined by the local effects of its Adapalene component and the minimal systemic exposure of its active ingredients. All documented interactions reflect information officially stated in government regulatory sources.

Documented Topical Interactions

Co-administration with other topical acne therapies or products that are desquamating, abrasive, or peeling carries a risk of cumulative local irritation and drying effects. This includes topical preparations containing Benzoyl peroxide, sulfur, resorcinol, or salicylic acid. The use of drying agents, such as astringents or high-concentration alcohol products, may also contribute to increased irritation.

Systemic and Photosensitivity Notes

The minimal systemic absorption of both Adapalene and Azithromycin significantly mitigates the risk of serious systemic drug-drug interactions. While the macrolide class (Azithromycin) is known for CYP3A4 inhibition, this pharmacokinetic interaction is not expected to be clinically relevant for the topical product. However, the Adapalene component has a documented photosensitization potential. Co-administration with other systemic agents that increase sensitivity to UV light, such as certain antibiotics or diuretics, poses an additive risk.

Population-Specific Caution

Although systemic absorption is low, official caution is noted regarding patients with severe hepatic impairment, as the clearance of the Azithromycin component belongs to a macrolide class that is hepatically dependent. This suggests a theoretical, heightened risk if significant systemic absorption were to occur in this population.

Mechanism of Action

ᴺ️ How Atm Works

The function of Atm results from the coordinated pharmacodynamic actions of its two ingredients, which target follicular cell differentiation, bacterial protein synthesis, and inflammatory signaling.


Normalization of Follicular Cell Differentiation

This mechanism is driven by Adapalene, which acts as a selective agonist of nuclear Retinoic Acid Receptors ( RAR-beta and RAR-gamma) in epidermal cells. This interaction modulates gene transcription to control the proliferation and cohesiveness (hyperkeratinization) of follicular cells. The resulting physiological effect is the restoration of follicular patency, which reduces the mechanical conditions necessary for comedo initiation.


Inhibition of Bacterial Protein Synthesis

This domain is driven by Azithromycin, which exerts a bacteriostatic effect by binding to the 50S ribosomal subunit of susceptible bacteria, inhibiting their protein synthesis. This targeted pathway interference arrests bacterial growth, leading to a reduction in the C. acnes population and a subsequent lowering of pro-inflammatory bacterial metabolites in the affected area.


Multi-Pathway Suppression of Inflammation

Both ingredients contribute to anti-inflammatory activity. Adapalene engages in the inhibition of the AP-1 transcription factor and TLR-2 down-regulation, while Azithromycin modulates the release of pro-inflammatory cytokines from immune cells. The synergy in this domain supports a dampening of the local immune response and limits the magnitude of the tissue's inflammatory reaction.

Dosage and Administration Information

How to Use Atm

This section outlines the general principles for the administration and dosage patterns of Atm, strictly based on prescribing information, focusing on procedural use rather than clinical judgment.


Administration Scope and Protocol

Atm is designated exclusively for topical administration to the skin. The product, available as a fixed-dose combination topical gel or solution, must be applied to the affected areas only. The preparation sequence requires the skin to be cleansed and fully dried before the product is applied, and hands must be washed immediately after use.

Feature Official Use Principle
Route of Administration Topical (Dermal application) only.
Dosing Schedule A thin film applied over the entire affected area.
Frequency Once daily, typically administered in the evening.

Duration and Specific Conditions

The standard regimen involves a once-daily application. Guidelines often specify application in the evening to align with the properties of the retinoid component. A critical administrative constraint is the duration of use: due to the inclusion of the antibiotic, the treatment course for the combination product is generally time-limited, often restricted to a course of up to 12 weeks. This specific duration is a measure intended to support antimicrobial stewardship.

Atm is typically approved for use in adolescents and adults within the indicated age range for Acne vulgaris, such as patients aged 12 years and older. The product must be strictly for external use only, with deliberate care to avoid contact with sensitive areas including the eyes, lips, and mucous membranes.

Recent Clinical Evidence

Research evidence / Overview of studies for Atm

Evidence for Use in Acne Vulgaris (Mixed Lesion Type)

Atm was evaluated in research exploring Acne vulgaris in conditions characterized by fluctuating or episodic manifestations, where both inflammatory (such as papules and pustules) and non-inflammatory lesions (such as comedones) are present. The primary research base consists of short-term, randomized controlled trials (RCTs) and systematic reviews or network meta-analyses that consolidate findings from multiple studies comparing the combination strategy to monotherapy or inactive applications. These studies were conducted during periods of increased symptom activity, and research examined how symptoms change over defined time intervals.

The research primarily examined patient-reported outcomes describing perceived discomfort and changes in lesion counts. Studies monitored lesion counts for both inflammatory and non-inflammatory types, and studies monitored the proportion of subjects whose condition was rated as clear or almost clear by the research investigators. Findings describe patterns observed in the studies related to these objective measurements. The research base for the overall combination approach (retinoid plus antimicrobial) is characterized by evidence of sufficient weight to establish efficacy in clinical guidelines.

Study Outcomes and Measures of Success

This subsection will outline the specific endpoints that researchers used in research exploring how symptoms change over time. Research explored changes in specific lesion counts and the use of global assessment scores for treatment success. These outcomes, which include patient-reported outcomes describing perceived discomfort, were the main focus in the short-term trials. Studies reported measurements of symptom evolution in the observed populations during the defined time intervals.

Long-Term Evidence and Follow-up Periods

The typical follow-up duration in the core clinical trials used to establish the evidence was limited to the short-term assessment of 12 weeks. While some studies monitored responses over defined time intervals up to three to nine months, there is limited information for long-term outcomes regarding the long-term changes observed with the specific topical fixed-dose combination.

Evidence in Different Study Populations

The research examined specific patient groups. Study populations primarily consisted of Adolescents and Adults, generally aged 12 years and older, who were diagnosed with Moderate to Severe acne. Data for certain groups remain insufficient. For instance, research examined older adults is limited, and specific data for pregnant or breastfeeding populations are not fully characterized in the core research evidence.

What Research is Still Uncertain About Atm

The research base has several areas where certainty remains low or where data are still emerging. One key research limitation frame is that while the strategy of combining a retinoid and an antimicrobial was observed in some studies to be a standard approach, the evidence for the specific fixed-dose topical combination may be based on extrapolation from trials where the two active ingredients were applied as separate products. Furthermore, the follow-up durations were limited in many of the core efficacy trials. This means that while research provides insight into short-term changes, limited information is available for long-term outcomes, and comparative evidence is lacking regarding certain alternative treatment regimens.

Frequently Asked Questions (FAQ)

Common questions about Atm (FAQ)

Q: How is Atm different from other medicines used for the same condition?

A: Official documents describe Atm as a fixed-dose combination product, containing a retinoid (Adapalene) and a macrolide antibiotic (Azithromycin). The official product information notes that this combination strategy provides a dual mechanism to target both follicular cell differentiation and bacterial protein synthesis, differentiating it from single-ingredient treatments.

Q: Can Atm be taken by people with kidney issues?

A: Since Atm is a topical medicine, only a very small amount is absorbed into the rest of the body. The official product information does not document specific restrictions related to mild kidney issues. However, caution is noted in regulatory documents for patients with severe renal impairment because of the Azithromycin component, which is a common rule for this class of medicine.

Q: Are there any age restrictions for using Atm?

A: According to official regulatory labeling, Atm is typically approved for use in patients aged 12 years and older. Safety and effectiveness have not been established in clinical studies for children younger than 12 years old. This age range is noted to ensure the product is used within its officially studied population.

Q: Is it possible to take Atm long-term?

A: The initial treatment course for the combination product is often time-limited, typically restricted to a duration of up to 12 weeks, which is a regulatory measure to support antimicrobial stewardship. The possibility of use beyond 12 weeks is subject to re-evaluation by a healthcare provider.

Q: Is it known if Atm interacts with common over-the-counter pain relievers?

A: Official information notes that systemic interactions with oral pain relievers are not expected, consistent with the minimal systemic absorption of the topical product. However, regulatory documents caution against using the product with other topical products that contain exfoliating ingredients like salicylic acid, as this may lead to excessive skin irritation and dryness.

Q: Can people who are pregnant use Atm?

A: Atm is generally contraindicated or not recommended for use during pregnancy, as stated in regulatory documents. This is primarily due to the retinoid component (Adapalene), a class of medicine known to be associated with potential fetal risks. Official documents emphasize the need for discussion with a healthcare provider regarding use during pregnancy or while planning pregnancy.

Q: Are there any restrictions on driving or operating machinery while using Atm?

A: Because Atm is a topical treatment with minimal absorption into the bloodstream, the official regulatory documents state that the medicine is not expected to affect a person’s ability to drive or operate machinery. Warnings regarding these activities are usually reserved for medicines with known effects on the central nervous system.

Q: Do older adults typically have different side effects with Atm?

A: While specific clinical study data for older adults (65 years and older) are limited, regulatory documents do not document a specific difference in the pattern of adverse reactions when compared to younger adults and adolescents. The general side effect profile remains the primary focus of safety monitoring.

Q: What is the main difference between the brand name and generic versions of Atm?

A: According to regulatory guidance, a generic version of a medicine must demonstrate pharmaceutical equivalence and bioequivalence to the brand-name product. This means the active ingredients (Adapalene and Azithromycin) are the same in strength and form. Any differences are typically related to the inactive ingredients used in the formulation.

Q: Is Atm used for things other than its primary listed use?

A: Atm is a prescription medicine approved by regulatory bodies exclusively for the topical treatment of Acne vulgaris (common acne). Official labeling does not support its use for any other medical conditions.

Q: How soon after starting Atm can a person expect to notice effects?

A: Studies and official information indicate that maximum improvement is often observed by 12 weeks of continuous use. It is also noted that an initial period of local skin irritation, such as peeling or redness, is common during the first four weeks of therapy as the skin adjusts to the medicine.

Q: Are there foods or drinks that should be avoided when taking Atm?

A: Because Atm is a topical medicine with very minimal systemic absorption, official regulatory documents state that no clinically significant food-drug interactions are expected. Therefore, no restrictions on general food or drink consumption are noted.

Q: What should be done if a dose of Atm is forgotten?

A: According to the official patient information, if a dose is forgotten, it is advised to skip the missed dose and apply the next dose at the regularly scheduled time. It is specifically stated that the dose should not be doubled to make up for the missed one.

Q: Is it possible to stop using Atm suddenly?

A: To achieve the full therapeutic benefit of the medicine, patients are generally advised in the prescribing information to complete the full duration of the course recommended. The prescribing information indicates that completing the full course is important for achieving the intended outcome.

Q: Are there any common health supplements that interact with Atm?

A: Regulatory documents recommend being cautious about combining Atm with any products that contain high levels of Vitamin A (retinoids) or other similar drying agents. The official concern is not a systemic drug interaction but the risk of increased local irritation and side effects on the skin.

Q: How does Atm impact the body, generally speaking?

A: Atm is described in official documents as having its main impact locally on the skin. This dual-action medicine works to normalize skin cell turnover and provide local antimicrobial activity, with minimal amounts of the active ingredients being absorbed into the body.

Q: Where can official regulatory information about Atm be found?

A: The most detailed and authoritative source for information about Atm is the full Prescribing Information (FDA Label/DailyMed) or the Summary of Product Characteristics (EMA SmPC). These documents are maintained and published by government health regulatory agencies.

Q: Is there a limit to how long Atm can be used, based on studies?

A: The core efficacy and safety studies used by regulatory bodies to establish the evidence for the combination product were primarily short-term, evaluating the drug for periods up to 12 weeks. Long-term data beyond this duration are less established in the core clinical trial evidence.

Q: What is the shelf life of Atm tablets?

A: The specific shelf life for Atm is determined by the manufacturer and is indicated by the expiration date printed on the packaging. Official storage conditions require the medicine to be kept at Controlled Room Temperature and protected from excessive heat, moisture, and light.

Q: Does Atm interact with alcohol?

A: Due to minimal systemic absorption, the risk of interaction is low; however, the Azithromycin component belongs to a drug class where specific warnings related to alcohol may be noted in some product information. This minimal absorption is the main factor in the topical product’s safety profile.

Q: Can Atm be taken on an empty stomach?

A: Atm is an externally applied topical medicine, such as a gel or solution, and is not intended to be swallowed. Therefore, official instructions regarding taking the product with or without food do not apply, as the product is not an oral medication.

Q: Does Atm need to be taken at a specific time of day?

A: The recommended regimen is to apply the product once daily. Official administration guidance often specifies that application should occur in the evening to align with the stability and activity properties of the retinoid component in the formulation.

How should Atm be stored and disposed of?

How to Store and Dispose of Atm?

The storage and disposal of Atm (Adapalene/Azithromycin topical) must adhere strictly to the official requirements to maintain its stability and ensure safety.


Storage Conditions

Atm must be stored at Controlled Room Temperature, defined as 20 C to 25 C (68 F to 77 F), with temporary excursions permitted up to 30 C (86 F). The product must be protected from freezing and excessive heat, moisture, and direct light. It is a mandatory requirement to store the medication out of the reach of children and to keep the container tightly closed when not in use.


Disposal Instructions

Unused or expired Atm must be disposed of according to official regulatory guidance. If no take-back program is available, the product should be mixed with an undesirable substance (like dirt or cat litter), sealed in a bag, and placed in the household trash. Do not flush the medication down the toilet or pour it into the drain.

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

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