Dermus

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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 Dermus

Quick Facts

Property Description
Active ingredient Tacrolimus (INN)
Form Topical Ointment (Prescription-Only)
Pharmacological class Calcineurin Inhibitor
General purpose Targeted immune modulation
Differentiating Feature Non-steroidal anti-inflammatory action

What Type of Medicine is Dermus?

Dermus is a prescription-only topical medication containing the single active ingredient, Tacrolimus. It is officially classified as an immunosuppressive agent and a Calcineurin Inhibitor.

This drug is a specialized immune modulator and is clinically recognized for its non-steroidal mechanism, which provides a key differentiating feature from traditional treatments. The medication is used in situations requiring targeted immune control, often in adults or specific pediatric groups.

The Active Component: Tacrolimus Ointment

The active component, Tacrolimus (INN), is formulated exclusively as a smooth ointment base for cutaneous administration. This formulation is distinctive because, unlike many creams, the ointment provides a rich vehicle designed to enhance the penetration of the Tacrolimus and maintain moisture in the treated area.

Tacrolimus is a synthetic compound derived from a macrolide structure. The final product is a single-ingredient product, focusing the therapeutic action solely on the properties of the calcineurin inhibitor.

What is the General Purpose of Dermus?

The overall purpose of Dermus is to calm the skin's overactive immune response that leads to inflammation. It functions by directly interrupting the signaling pathway inside immune cells called T-lymphocytes.

By blocking this immune process, the medication effectively prevents the release of inflammatory chemicals. This targeted action helps to control chronic inflammation, allowing the skin to minimize discomfort and restore a healthier appearance.

Regulatory References

  1. Tacrolimus Topical Ointment Drug Information (MedlinePlus)

What side effects are possible with Dermus?

Possible Side Effects and Safety Information

The safety profile of Dermus (tacrolimus ointment) is classified based on clinical trial data and post-marketing surveillance, as documented by regulatory authorities. The most frequently reported adverse reactions are localized to the application site.


Frequency-Classified Adverse Reactions

The following are examples of adverse reactions categorized by frequency in official regulatory documents:

Classification Examples of Documented Effects
Very Common (ge 10%) Burning sensation, pruritus (itching) at the application site.
Common (1% to <10%) Erythema (redness), stinging, pain, folliculitis, headache, flu-like symptoms, lymphadenopathy.
Incidence Not Known Reports of malignancy (lymphoma, skin cancer), seizures, acute renal failure.

Application site reactions are typically more common at the start of treatment and generally lessen within the first week as the skin lesions improve. Certain effects, such as Herpes Simplex or Eczema Herpeticum, fall under the Infections and Infestations System-Organ Class.


Serious Regulatory Safety Constraints

Official labeling includes specific warnings regarding potential serious adverse reactions. The FDA label contains a Boxed Warning concerning rare reports of malignancy, specifically lymphoma and skin cancer. Use is restricted to individuals who are non-immunocompromised and is contraindicated in patients with conditions like Netherton’s syndrome or generalized erythroderma.

Patients should minimize or avoid natural or artificial sunlight exposure during use. Furthermore, continuous long-term use (beyond one year) is advised against, as the safety profile for such extended duration is not fully established in regulatory data. Use in children is restricted to the lower strength and is only indicated for those aged 2 years and older.

Overdose and Emergency Response

Overdose and When to Seek Help

The official regulatory profile for Dermus is defined primarily by the risk of accidental oral ingestion of the ointment, given that significant systemic exposure from topical application is generally minimal. Accidental swallowing may lead to adverse effects associated with the systemic administration of tacrolimus, a condition classified as overexposure or toxicity.

Documented Manifestations and Severe Outcomes: Overexposure may present with gastrointestinal symptoms such as persistent nausea, vomiting, and diarrhea. Other officially documented signs of systemic toxicity include neurological effects like headache, confusion, sleepiness, and noticeable tremor (uncontrollable shaking). Severe, life-threatening manifestations requiring immediate medical attention include seizures (convulsions), collapse, or profound trouble breathing or unresponsiveness.

Mandated Emergency Action: If overdose is suspected or the medicine is accidentally swallowed, immediate medical care must be sought. Official guidance mandates contacting a Poison Control center for assistance. If the victim has collapsed, had a seizure, has trouble breathing, or cannot be awakened, emergency services (911) must be called immediately. Management is restricted to symptomatic and supportive treatment, as no specific antidote is officially known.

Population Considerations: The risk of overexposure is noted to be greater in patients with severely compromised skin barriers, which can increase the potential for tacrolimus systemic absorption.

Therapeutic Uses of Dermus

Dermus (tacrolimus ointment) is generally used to help with moderate to severe chronic inflammatory skin conditions, such as Atopic Dermatitis (Eczema). It is applied across domains where additional symptomatic support is needed in adults and children aged 2 years and older.

The medication is commonly used across conditions presenting with recurrent or episodic manifestations, including severe pruritus, erythema, and persistent inflammation. It is relevant in situations involving certain distressing symptoms, typically when prior supportive efforts have not achieved sufficient symptom control.


Targeted Relief of Skin Inflammation and Pruritus

“The medication is applied across domains where additional symptomatic support is needed to manage the cluster of inflammation and irritation, which become more disruptive during flare-ups.”

Dermus primarily addresses the cluster of inflammation, redness, and severe pruritus. The medication is generally used to help with managing symptoms that interfere with daily comfort and contributes to easing the overall symptom load during symptomatic periods.


Contextual Benefit for Relapsing Conditions

As a non-steroidal treatment, it is commonly used across conditions presenting with recurrent or episodic manifestations that require consistent, long-term management. It supports general well-being and improved comfort on sensitive areas like the face and neck. It may be part of symptomatic management applied during phases of increased distress or discomfort to help maintain a sense of stability when symptoms are more noticeable.

Quick Fact: Relief for Chronic Itching

Dermus is commonly used for managing intense, disruptive pruritus associated with moderate to severe eczema, supporting comfort during periods of heightened symptoms.

Regulatory References

  1. MedlinePlus Drug Information

Eligibility and Restrictions for Use

Who can and cannot use Dermus (Tacrolimus Ointment)

The population eligibility for Dermus is strictly defined by regulatory documents, outlining who is allowed, restricted, or contraindicated from using the medicine.

Contraindications (Must Not Use) The medicine is strictly contraindicated for patients with a known hypersensitivity to the active ingredient, Tacrolimus, or to macrolides in general. Use is also prohibited in individuals with congenital or acquired immunodeficiencies or those currently receiving systemic immunosuppressive therapy.

Age-Related Eligibility Dermus is not indicated for use in children younger than 2 years of age. Eligibility starts at age 2, but children aged 2 to 15 years are restricted to using only the 0.03% strength. Adults (16 years and older) may use both the 0.03% and 0.1% strengths.

Special Population Restrictions Use is not recommended for women who are pregnant or breastfeeding. Furthermore, the medicine is restricted for patients with hepatic failure (use only with caution) and requires that any active clinical infections at the treatment sites must be cleared before starting use. The ointment must also not be applied to potentially malignant skin lesions.

What should I know about interactions with other medicines?

Interactions with other medicines and products

The interaction profile of Dermus is defined by its role as a substrate for the CYP3A4 enzyme and a substrate and inhibitor of drug transporters (P-glycoprotein/P-gp and OATP1B1/1B3). These pharmacokinetic factors necessitate careful review of co-administered medications.

Official Regulatory Classifications

Interaction Scope Constraint/Requirement
Contraindicated Combinations Co-administration with specific strong CYP3A4 inhibitors is strictly prohibited due to the risk of significant increases in Dermus systemic exposure.
Exposure Modifiers Concomitant use with strong CYP3A4 inducers (e.g., Rifampin, St. John's Wort) must be avoided as they may substantially decrease Dermus plasma concentrations.
Pharmacodynamic Interactions Official warnings exist regarding additive effects when Dermus is combined with other central nervous system (CNS) depressants or QTc-prolonging agents.

Specific Non-Medicinal Product Constraints

Interactions with non-drug substances are also documented in regulatory labeling. The consumption of alcohol is restricted due to potential additive CNS depression. Additionally, the label requires a timing-separation rule for specific co-administered agents, such as antacids, which must be taken at least two hours apart from Dermus to prevent reduced absorption.

Population-Specific Notes

The relevance of interactions with metabolic inhibitors is noted to be greater in patients with pre-existing hepatic impairment, as specified in the official Prescribing Information.

Mechanism of Action

How Dermus Works: Molecular Mechanism of Action

The mechanism of Dermus is based on the precise interruption of the signal cascade that drives T-lymphocyte activation, resulting in focused immune modulation.


Calcineurin Inhibition and Intracellular Complex Formation

The active ingredient, Tacrolimus, begins its action by binding to the intracellular immunophilin FKBP12, forming a functional complex. This complex then allosterically inhibits the enzyme Calcineurin within the T-cell. This molecular action interrupts the enzyme-mediated signal amplification required for T-cell activation.

Blockade of NFAT and Gene Transcription

Following enzyme inhibition, the drug's mechanism prevents the dephosphorylation of the transcription factor Nuclear Factor of Activated T cells (NFAT), thereby limiting its movement to the nucleus. This blockade limits the factor's ability to activate the genes responsible for generating key inflammatory mediators, thereby reducing the cell's capacity for an inflammatory response.

Reduction of Pro-inflammatory Cytokine Synthesis

The physiological consequence of this molecular pathway is the reduction of the transcription of genes for growth factors, primarily Interleukin-2 ( IL-2), and other inflammatory cytokines. This reduction of the chemical signals associated with T-cell proliferation defines the basis for its local activity in immune modulation.

Dosage and Administration Information

How to Use Dermus: Official Administration Guidelines

Dermus, containing the active substance tacrolimus, is used strictly as a topical application (cutaneous route), according to the prescribing information. The medication is not approved for oral or other systemic forms of administration.

Administration Scope Detail
Route of Administration Topical application to the skin.
Dosing Schedule & Strength Application involves applying a thin layer of ointment to the affected areas. Adults (≥ 16 years) may use either the 0.03% or the 0.1% strength. Pediatric patients (aged 2 to 15 years) must be treated only with the 0.03% strength ointment.
Frequency Pattern Initial treatment typically follows a twice-daily schedule. Once the condition improves and symptoms clear, the frequency is intended to transition to an intermittent maintenance schedule, which may involve application as infrequently as two times per week.
Course Duration & Use Use is defined as short-term during acute episodes or for intermittent long-term management. The medication should be discontinued immediately upon resolution of the treated skin condition.
Special Procedural Conditions Guidelines specify that the treated area must not be covered with occlusive dressings (e.g., bandages or wraps) unless explicitly advised by a physician. If a dose is missed, patients should apply it when remembered, unless the next scheduled dose is imminent, in which case the missed application is generally skipped.

The official use protocol is structured to facilitate local administration via the skin surface, governing precise strength selection based on age group and defining a rigid application schedule. This regimen dictates a transition from a twice-daily initiation phase to a long-term intermittent schedule, ensuring adherence to the established parameters for use.

Recent Clinical Evidence

Research Evidence / Overview of Studies for Dermus

Evidence for Use in Moderate to Severe Atopic Dermatitis

Clinical research has focused on understanding the patterns of change related to moderate to severe Atopic Dermatitis (Eczema), a condition characterized by fluctuating and episodic manifestations. Studies conducted during periods of increased symptom activity have included short-term Randomized Controlled Trials (RCTs). In these trials, researchers compared the outcomes of the ointment against an inactive vehicle (a placebo ointment) and against some topical corticosteroids.

These studies were primarily used in research exploring how symptoms change over time. The main outcomes related to physical discomfort that were measured included standardized clinical scores like the Eczema Area and Severity Index (EASI) and SCORAD. These scores are used in research to track the extent and severity of the condition, and findings describe group patterns related to physician-determined overall improvement assessments.

Long-Term Studies and Follow-Up Data

Research examined long-term outcomes for this condition, which can involve cycles of stability and flare-ups. To address this, studies monitored outcomes over defined time intervals that extended beyond the initial short-term trials. Researchers conducted non-comparative, open-label extension studies with follow-up durations that ranged from one year up to four years.

These longer-term observational studies were applied in research contexts involving fluctuating or unstable symptoms. They primarily tracked how symptoms evolved related to disease severity and monitored the frequency of exacerbations (flares) over the extended period. However, the long-term effects are not fully established, particularly through direct, comparative research. Comparative evidence is lacking for how the measurements of this ointment compare against those of control groups over multiple years.

Evidence in Specific Patient Groups

The research has also examined how the ointment was evaluated in specific patient populations. Studies included both Adults and Pediatric patients, typically children aged 2 years and older, who presented with moderate to severe Atopic Dermatitis. Specific research has also been applied in studies examining patient-reported experiences related to treatment on sensitive skin areas, such as the face and neck.

Comparative Research: Studies Against Other Topical Treatments

Studies explored the characteristics of the ointment by comparing it against other options relevant to the management of Atopic Dermatitis. These research scenarios included comparing outcomes against an inactive vehicle ointment and against various potencies of topical corticosteroids (TCS). Findings describe patterns observed in the studies during the study period for outcomes linked to inflammatory or irritative states and symptom intensity.

Key Limitations and Areas for Future Research

The body of research, while providing context, still contains certain limitations and gaps. One key finding is that follow-up durations were limited in many of the initial comparative trials. This means that comparative measurements focusing on long-term effects are still emerging. The overall evidence contributes to the broader evidence landscape, but certainty remains low for the longest-term effects and the consistency of findings across every possible sub-group.

Key Studies & References

  1. Tacrolimus Ointment (Topical Route) - MedlinePlus Drug Information
  2. National Institute for Health and Care Excellence (NICE) Guideline: Atopic eczema in under 16s: diagnosis and management

Frequently Asked Questions (FAQ)

Common questions about Dermus (FAQ)


Q: How quickly does Dermus usually start working?

Official guidance documents indicate that the effectiveness of Dermus is typically assessed by a health professional after a period of 6 weeks. This timeframe is used to evaluate how the medicine is performing in managing the condition. This information is intended for assessment purposes, not as a guarantee of when you will see results.


Q: What are the most commonly reported side effects of Dermus?

According to official prescribing information, the most commonly reported effects are localized reactions at the application site. These include a burning sensation and itching, which are listed as "very common" (occurring in 10% or more of patients) in clinical studies. These reactions are typically more noticeable when treatment is first started.


Q: What should be avoided while using Dermus?

Regulatory documents detail several constraints related to Dermus use. Constraints include avoiding the use of occlusive dressings (like bandages or wraps) over the treated area, minimizing exposure to natural or artificial sunlight, and avoiding certain interacting medicines. Official labeling also notes that the consumption of grapefruit or grapefruit juice is restricted.


Q: Are there any known issues with alcohol consumption while using Dermus?

Official documents note that alcohol consumption is restricted while using Dermus. The combination is described as potentially causing an additive effect of central nervous system (CNS) depression. Some reports also describe experiencing skin flushing or irritation in the area where the ointment was applied after consuming alcohol.


Q: What is the evidence regarding Dermus use in people with pre-existing liver conditions?

Official guidance notes that use is restricted for patients with hepatic failure. For individuals with pre-existing hepatic impairment, or liver problems, official documents require caution. This is because of the potential for interactions with medicines processed by the body's metabolic system in the liver.


Q: What is the typical timeframe for seeing the full intended effect of Dermus?

Official instructions recommend that a health professional reassess the patient's condition if the symptoms have not shown improvement after 6 weeks of use. This timeframe serves as an important checkpoint for determining whether the treatment plan should be continued or adjusted.


Q: Is it normal to feel a slight tingling when I first use Dermus?

Yes, tingling in the skin at the application site is a documented adverse reaction in official product information. This effect is generally reported as common, especially during the initial days of treatment as the skin adapts to the medication. It is an expected local sensation, similar to burning or itching.


Q: Are there any common foods or drinks that interact with Dermus?

Regulatory documents specifically state that the consumption of grapefruit and grapefruit juice is restricted. This is because these products may interact with the way the body processes the medication, potentially increasing the amount of the drug absorbed into the body.


Q: How does Dermus differ from other treatments for the same condition?

Dermus is classified as a non-steroidal calcineurin inhibitor, which gives it a different mechanism of action than traditional topical corticosteroids. This means it reduces inflammation by acting directly on immune cells in the skin without relying on steroid compounds. Official studies have compared the characteristics of Dermus against topical corticosteroids.


Q: What is the risk level for serious side effects with Dermus?

Official regulatory documents include a Boxed Warning concerning rare reports of malignancy, specifically lymphoma and skin cancer. However, official information describes the systemic absorption of the topical ointment as very low compared to the oral forms of the medicine used in other conditions.


Q: Can Dermus cause problems with kidney function?

Post-marketing experience documents rare reports of acute renal failure (a sudden severe reduction in kidney function). For this reason, official documents require caution for patients with pre-existing renal dysfunction, or kidney problems.


Q: Is it okay to use moisturizer or other skin products with Dermus?

Official instructions state that applying cosmetics or other non-medicated skin care products to the treated area is not advised. If a moisturizer is used, the official guidance indicates it should be applied after the Dermus application.


Q: Does Dermus cause weight changes?

Rapid weight gain and weight loss are both adverse reactions that have been reported in post-marketing experience. Official documents list these effects as having an Incidence Not Known classification, meaning they are considered rare.


Q: Are there known interactions between Dermus and common over-the-counter pain relievers?

Regulatory documents note a potential interaction with other medicines that can affect the kidneys, known as nephrotoxic effects. This includes Nonsteroidal Anti-Inflammatory Drugs (NSAIDs), which are common over-the-counter pain relievers.


Q: Can men and women use Dermus for the same conditions?

Dermus is approved for the same inflammatory skin condition, Atopic Dermatitis, in both men and women. The official eligibility criteria for use do not list any restrictions based on sex for its approved indication.


Q: What kind of monitoring is usually required when using Dermus?

Official guidance emphasizes the need for regular follow-up visits with a health professional. This monitoring is required to check the patient's progress, ensure the medication is working as intended, and check for any unwanted effects.


Q: Does Dermus affect sleep?

Yes, official prescribing information documents that insomnia, which is difficulty sleeping, is a common adverse reaction. It is listed as occurring in 1% to <10% of patients in clinical trial data.


Q: Why do some people experience initial worsening of symptoms with Dermus?

Many people who start using Dermus experience localized skin symptoms such as a burning sensation, stinging, or itching. Official documentation notes that these sensations are very common, especially during the first few days of application. These common application-site reactions may sometimes be mistaken for a worsening of the underlying condition.


Q: Are there different strengths of Dermus available?

Yes, Dermus is available as a topical ointment in two different strengths: 0.03% and 0.1%. The official prescribing information designates which strength is appropriate for use based on the patient's age group.


Q: Can Dermus be safely used with blood pressure medications?

Regulatory documents indicate a potential interaction with certain calcium channel blockers, which are a class of medications sometimes used to manage blood pressure. Specifically, diltiazem and verapamil are listed as having this interaction potential.


Q: Is Dermus stored at room temperature or does it require refrigeration?

Official storage conditions indicate that Dermus must be kept at controlled room temperature, specifically between 20^\circC and 25^\circC (68^\circF and 77^\circF). The medicine is officially directed to be protected from freezing and should not be placed in the refrigerator.


Q: Can Dermus be used by people with sensitive skin?

Studies have examined the characteristics of Dermus when applied to sensitive skin areas, such as the face and neck. However, the most common reported effects are localized sensations of burning and itching at the site of application, particularly when beginning treatment.


Q: Does Dermus interact with contraceptives?

Regulatory documents note a potential interaction with steroid-based contraceptives. The medicine may reduce how quickly the body clears the contraceptive hormone, which could lead to increased exposure to the hormone.

How should Dermus be stored and disposed of?

Storage Conditions

Dermus (Tacrolimus Ointment) must be stored at controlled room temperature, typically 20 C to 25 C (68 F to 77 F). The product must be kept from freezing and should not be refrigerated. It is essential to keep the ointment in its original container, which must be tightly closed, and protect it from excessive heat, moisture, and light. To ensure safety, the product must be stored out of the sight and reach of children .

Disposal Instructions

Unused or expired Dermus should be disposed of according to local regulatory guidelines. The preferred method is using a drug take-back program. If a take-back option is unavailable, the medicine should be mixed with an undesirable substance, placed in a sealed container, and discarded in the household trash. Do not dispose of this product by flushing it down a toilet or pouring it down a drain.

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

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