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Imatinib Denk

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Medically reviewed

Laura Arias

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.

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Overview of Imatinib Denk

What is Imatinib Denk?

Imatinib Denk is a pharmaceutical medication containing the active substance imatinib. It belongs to a class of drugs known as protein tyrosine kinase inhibitors. These agents are designed to interfere with specific proteins involved in the signaling pathways that lead to the uncontrolled growth and proliferation of certain types of cells.

Mechanism of Action

The active ingredient, imatinib, works by blocking the action of an abnormal enzyme (tyrosine kinase) that sends signals to cells to multiply. By inhibiting this specific enzyme, the medication helps to slow down or stop the production of abnormal cells.

In various biological conditions, this enzyme is linked to the Bcr-Abl protein, which is often the result of a specific genetic abnormality. Imatinib binds to the site of this protein, effectively turning off the 'switch' that triggers cellular overgrowth.

Therapeutic Use Cases

Imatinib Denk is primarily used in the management of specific blood-related conditions and certain types of solid tumors. Its application is generally focused on diseases where the Bcr-Abl protein or similar tyrosine kinases (such as KIT or PDGFR) are known to drive the progression of the condition.

Commonly addressed conditions include:

  • Chronic Myeloid Leukemia (CML): A type of blood cancer where the bone marrow produces too many white blood cells.
  • Philadelphia Chromosome-Positive Acute Lymphoblastic Leukemia (Ph+ ALL): A rapid-form leukemia characterized by a specific genetic mutation.
  • Gastrointestinal Stromal Tumors (GIST): A type of cancer that grows in the walls of the digestive tract.
  • Dermatofibrosarcoma Protuberans (DFSP): A rare type of tumor that develops in the deep layers of the skin.
  • Hypereosinophilic Syndrome (HES): A condition involving an overproduction of eosinophils, a type of white blood cell.

Form and Composition

Imatinib Denk is typically formulated as film-coated tablets for oral administration. As a generic version of the reference medicinal product, it contains the same active substance and is designed to deliver the same therapeutic effect. The medication is specifically targeted at the molecular level, aiming to provide a systemic approach to managing cellular malfunctions without affecting all rapidly dividing cells in the body, distinguishing it from traditional cytotoxic chemotherapy.

Regulatory References

  1. NCI Drug Dictionary: Imatinib Mesylate
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What side effects are possible with Imatinib Denk?

Possible Side Effects and Safety Information

The safety profile of Imatinib Denk is based on comprehensive data from clinical studies and regulatory documents, which formally classify documented adverse reactions by frequency and affected body systems. The information presented is strictly aligned with regulatory labels from authorities such as the EMA and FDA.

Frequency-Classified Adverse Reactions

Adverse reactions are officially categorized by how often they occur. The most frequently reported reactions, classified as Very Common ( >10%), include fluid retention (edema), nausea, vomiting, diarrhea, muscle cramps, musculoskeletal pain, fatigue, and certain blood disorders (neutropenia, anemia, thrombocytopenia) [FDA Label, EMA SmPC]. Reactions are generally observed most often during the initial stage of therapy.

Serious Safety Concerns

The regulatory labels specify several serious safety concerns. These include the potential for severe hepatotoxicity (liver damage), cardiac dysfunction (e.g., severe congestive heart failure), and progression to severe forms of fluid retention (e.g., pleural effusion, pulmonary edema). Cases of serious gastrointestinal hemorrhage and perforations have also been documented. Long-term use is associated with potential toxicities to the liver, kidney, and heart, as noted in official documents.

Population and General Safety Constraints

Safety statements exist for specific populations. Growth retardation has been reported in pediatric patients, and the drug carries a potential for fetal harm during pregnancy. Patients with severe hepatic impairment may experience increased exposure to the drug. Due to reports of blurred vision and dizziness, official caution is advised regarding driving a car or operating machinery. The label also mandates the monitoring of liver function (hepatic transaminases and bilirubin) prior to and monthly during treatment.

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Overdose and Emergency Response

Overdose and when to seek help

The official regulatory information describes specific manifestations that occur in cases of Imatinib overdosage, which necessitate seeking immediate medical attention.

Documented Manifestations and Consequences

Overdose cases documented in official prescribing information, including those with doses up to 3,200 mg, have shown a variety of symptoms, particularly affecting the gastrointestinal and hematologic systems.

System Documented Clinical Manifestations
Gastrointestinal Nausea, vomiting, diarrhea, abdominal pain, flatulence
Systemic/Cutaneous Fatigue, muscle spasms, swelling, edema, rash erythema, fever, jaundice

Serious consequences documented in the setting of overdosage are related to severe blood cell deficiencies, including pancytopenia, thrombocytopenia, and neutropenia. Signs of liver injury, such as elevated aminotransferases and jaundice, have also been reported with higher exposures.

Emergency Action and Supportive Management

In the event of a known or suspected overdosage, immediate medical attention is required. Official regulatory guidance mandates that the patient must be observed and given appropriate supportive treatment.

Regulatory documents confirm that no specific antidote is known for Imatinib. Furthermore, due to the drug’s high plasma protein binding, dialysis is unlikely to be helpful in removing Imatinib from the body. Population-specific considerations include documented overdose cases in children with unique reported symptoms, such as face swelling and limb pain.

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Therapeutic Uses of Imatinib Denk

What Imatinib Denk Treats: Main Uses and Benefits

Imatinib Denk is commonly used for managing specific types of cancers and blood disorders, focusing on the specific drivers of the conditions, which contributes to long-term patient support.

This medication is commonly used for managing multiple conditions, including Chronic Myeloid Leukemia (CML) and specific tumors.

The treatment is relevant in clinical settings marked by increased discomfort or tension. It helps address symptom clusters that may become intense or disruptive, such as fatigue, night sweats, or tumor-related discomfort.

“The approach is relevant in managing symptoms that interfere with daily comfort and assists with maintaining functional stability.”

For individuals with GIST, the treatment may assist with stabilizing or reducing the tumor size, which can help ease related pain and discomfort. For CML, the medication supports the management of the condition and is commonly used to help with sustaining long-term symptomatic control.

Quick Fact: Managing Disease-Related Fatigue
The medication may assist with easing systemic symptoms like fatigue and night sweats that are linked to the underlying disease activity.
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Eligibility and Restrictions for Use

Who Can and Cannot Use Imatinib Denk?

The official regulatory profile for Imatinib Denk establishes absolute contraindications and conditional requirements for use across different patient populations.

Use is contraindicated (absolutely forbidden) in patients with a known hypersensitivity to the active substance Imatinib or any of its excipients. This is the sole non-negotiable exclusion.

Conditional and Restricted Use

Age-Related Eligibility: The medicine is approved for adult patients and pediatric patients for specific leukemias (typically starting at one year of age). Safety and efficacy are not established in children younger than 1 year of age. Pediatric patients require mandated close monitoring of growth as a condition of continued use.

Organ Function and Comorbidity: Patients with severe hepatic impairment or moderate renal impairment are eligible for use, but only if they adhere to an officially specified initial dose reduction. Patients with pre-existing cardiac risk factors require careful monitoring during treatment.

Reproductive Status: For women of reproductive potential, use is permitted under the mandatory condition of using effective contraception throughout treatment and for a specified time following the final dose. Breastfeeding is not recommended during the treatment period.

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What should I know about interactions with other medicines?

Interactions with other medicines and products

Imatinib is predominantly metabolized by the CYP3A4 enzyme and is also an inhibitor of CYP3A4, CYP2D6, CYP2C9, and the drug transporter P-glycoprotein (P-gp). This dual activity is the primary basis for officially documented drug-drug interactions.

Interaction Type Regulatory Restriction/Outcome
Strong CYP3A4 Inducers Co-administration is contraindicated (e.g., Rifampicin, Phenytoin, Carbamazepine). This results in a significant decrease in Imatinib exposure (AUC).
Strong CYP3A4 Inhibitors Co-administration (e.g., Ketoconazole, Itraconazole) significantly increases Imatinib plasma concentrations.
Coumarin Derivatives Requires close monitoring, as Imatinib increases the anticoagulant effect, documented by an increase in the International Normalized Ratio (INR).
P-gp Substrates Imatinib may increase the plasma concentrations of co-administered P-gp substrate medicines.
Simvastatin A maximum daily dose restriction is mandated for this co-administered CYP3A4 substrate due to increased exposure.

Interactions with Food and Herbal Products: The herbal product St. John’s Wort (Hypericum perforatum) is a strong CYP3A4 inducer and is therefore contraindicated. Grapefruit juice is documented as a CYP3A4 inhibitor that may increase Imatinib plasma concentrations. Official documents note that Imatinib exposure is increased in patients with hepatic impairment.

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Mechanism of Action

Targeted Molecular Blockade of Kinase Enzymes

Imatinib functions as a selective Type 2 protein-tyrosine kinase inhibitor (TKI). Its core mechanism involves binding to the adenosine triphosphate (ATP) pocket of specific, abnormally activated enzymes, primarily the BCR-ABL fusion protein, c-KIT, and PDGF-R. Acting as an ATP-competitive inhibitor, the drug occupies the enzyme's active site, locking the kinase in its inactive conformation. This action prevents the enzyme from performing the phosphorylation of downstream proteins, thereby modulating the signal transmission associated with cell proliferation.


Interruption of Cell Survival and Proliferation Signals

By blocking the primary kinase targets, Imatinib interrupts critical signal transduction pathways (like Ras/MAPK and PI3K/AKT) that continuously drive cell division and promote survival. This interruption removes the constitutive growth signal, forcing the affected cell population into growth arrest and triggering apoptosis (programmed cell death). The resulting physiological consequence is the selective suppression and reduction of the cell populations dependent on the blocked kinases.


Mechanistic Constraints and Resistance

The functional capacity of this mechanism is constrained by biological factors, most notably the development of point mutations in the target enzyme (e.g., the T315I mutation in BCR-ABL), which structurally prevent Imatinib from binding. Furthermore, the over-expression of efflux transporters can reduce the drug’s necessary intracellular concentration, allowing the affected cell line to retain proliferative signaling and bypass the targeted molecular interference.

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Dosage and Administration Information

How to Use Imatinib Denk: Official Administration Guidelines

Imatinib Denk is prescribed for oral administration and must be taken according to specific schedules. The film-coated tablets should be swallowed whole, but the tablets may also be dispersed in a set volume of still water or apple juice for patients unable to swallow them.


Dosing and Frequency Rules

Standard starting doses for adults are typically 400 mg or 600 mg once daily, depending on the specific approved indication. The total daily dose should not exceed the maximum of 800 mg. Doses of 400 mg or 600 mg are taken once daily, while the maximum 800 mg dose is required to be administered as 400 mg twice daily (morning and evening).

Administration Timing: All doses must be taken with a meal and a large glass of water to minimize potential gastrointestinal irritation and optimize absorption.


Use Patterns and Adjustments

Treatment Duration: For most indications, the medicine is continued long-term, typically until disease progression. A distinct exception is the adjuvant treatment of GIST, which is associated with a recommended course of three years.

Missed Dose Guidance: If a scheduled dose is forgotten, the patient should continue with the next regularly scheduled dose and must not take an extra dose to compensate for the missed one.

Population-Specific Dosing: Pediatric dosing is calculated using Body Surface Area (340 mg/m^2 daily), not exceeding 800 mg total daily. Furthermore, a dose reduction, for example from 400 mg to 300 mg per day, is utilized for patients with severe hepatic impairment.

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Recent Clinical Evidence

Research evidence / Overview of studies for Imatinib Denk

The clinical evidence for Imatinib Denk is based on findings reported from formal clinical trials, followed by extended observation periods in patient cohorts. The studies were designed to monitor specific changes in disease activity.


Evidence for use in Chronic Myeloid Leukemia (CML) Studies

Research has extensively examined Imatinib in patients with newly diagnosed Chronic Myeloid Leukemia (CML). This body of evidence includes landmark international Randomized Controlled Trials (RCTs) that compared the outcomes recorded in the Imatinib group against those observed with previous standard therapies. These studies were designed to measure specific changes, including the achievement of Hematologic Response (HR) and Cytogenetic Response (CgR), which are key disease response markers.

The pivotal studies reported measurements of molecular and cytogenetic response rates that were recorded in the observed patient groups. Long-term observational cohorts were established to track patients for extended periods, with some data showing observation periods over a decade. Studies observed and recorded measurements of Overall Survival (OS) in these patient populations. Research also explored the study of treatment reduction or discontinuation in a selected patient subgroup.

How Research Addressed Different CML Phases

The design of the studies differed based on the stage of CML. For patients in the more advanced accelerated phase or blast crisis, research primarily relied on smaller single-arm studies and Phase I/II trials. These studies were designed to monitor short-term symptom changes and initial response rates. Because the disease presents with cycles of stability and flare-ups in advanced phases, study measurements described a lower consistency of response over time compared to the pattern observed in the chronic phase.


Evidence for use in Gastrointestinal Stromal Tumors (GIST) Studies

Research was studied for adult patients with Gastrointestinal Stromal Tumors (GIST) in two main contexts: advanced/metastatic disease and post-surgical (adjuvant) use. For the adjuvant setting (after the tumor was surgically removed), the evidence includes Randomized, double-blind, placebo-controlled Phase III trials designed to measure Recurrence-Free Survival (RFS). These adjuvant trials reported measurements of RFS that were documented for a longer period in the treatment arm compared to the control group.

Research on Treatment Duration in GIST

Clinical trials were evaluated in the adjuvant setting to compare different timeframes of use, such as one year versus three years. These studies were designed to measure whether continued observation of patients for a longer period recorded different measurements in the endpoints of RFS and Overall Survival (OS). However, the role of different treatment durations is not fully established, and studies comparing different timeframes have recorded varied RFS and OS measurements.

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Frequently Asked Questions (FAQ)

Common questions about Imatinib Denk (FAQ)

Q: What specific cancers or blood disorders is Imatinib Denk approved to treat?

Imatinib is approved by regulatory authorities for the management of several conditions. These include Philadelphia chromosome positive chronic myeloid leukemia (Ph+ CML) and acute lymphoblastic leukemia (Ph+ ALL). Official documents also list its use for solid tumors such as Gastrointestinal Stromal Tumors (GIST) and other conditions like MDS/MPD and ASM.

Q: Do muscle cramps or bone pain happen often with Imatinib Denk, and what causes them?

Muscle cramps and musculoskeletal pain are listed in official product information as very common side effects, meaning they are frequently reported in patients. Regulatory documents confirm the frequency of these symptoms. However, official sources do not state the exact underlying medical cause or molecular mechanism of why these specific pains occur.

Q: Can I drink alcohol in moderation while taking Imatinib Denk?

Official information indicates that Imatinib is associated with a potential risk of hepatotoxicity (liver damage) and hemorrhage (bleeding). Although a specific restriction on alcohol consumption is not detailed in the drug label, general medical guidance suggests that consuming alcohol can increase the risk of liver problems. Consultation with a healthcare provider is recommended for personalized guidance on alcohol consumption.

Q: What types of prescription medicines are known to have major interactions with Imatinib Denk?

Imatinib interacts with medicines that affect the CYP3A4 liver enzyme. Official documents list strong inhibitors (like certain antifungals) and strong inducers (like certain anti-seizure medicines), which can significantly alter Imatinib concentrations in the blood. Close monitoring is also required when taken with blood thinners called Coumarin Derivatives due to the potential increased risk of bleeding.

Q: What should be done if I experience sudden, rapid weight gain while taking Imatinib Denk?

Official guidance indicates that unexpected rapid weight gain or the appearance of significant swelling (edema) should be communicated to a healthcare provider promptly. Severe fluid retention is a serious safety concern. It is managed through measures such as temporary dose interruption, as determined by a physician.

Q: Can Imatinib Denk cause problems with blood clotting or increase the risk of bleeding?

The regulatory label notes that Imatinib carries a risk of hemorrhage (bleeding), including serious bleeding within the stomach or intestines (gastrointestinal hemorrhage). The medicine may also cause thrombocytopenia (low platelet count), which generally increases the risk of bleeding. Official safety information suggests monitoring for signs of unusual bleeding or bruising.

Q: How is the effectiveness of Imatinib Denk monitored by the doctor?

The medicine's effectiveness is monitored by checking for key disease indicators, which often involves analyzing blood and bone marrow samples. The achievement of specific response markers, such as Hematologic Response (HR) and Cytogenetic Response (CgR), is tracked. Ongoing patient monitoring typically involves frequent checks of Complete Blood Counts (CBCs) and liver function tests.

Q: Can Imatinib Denk lead to or worsen existing heart problems?

The regulatory label states that Imatinib can cause or worsen conditions like congestive heart failure and issues with the heart's pumping function (left ventricular dysfunction). Patients with pre-existing cardiac risk factors require careful monitoring throughout treatment. Patients are advised to ensure their complete medical history, especially heart health, is known to their prescribing physician.

Q: Is it true that Imatinib Denk can interact with certain antifungals or antiviral medicines?

Yes, regulatory documents confirm that Imatinib can interact with medicines that are processed by the CYP3A4 enzyme, which includes many antifungals and antivirals. Specifically, strong CYP3A4 inhibitors, such as certain antifungal agents (like ketoconazole), can significantly increase the concentration of Imatinib. Official guidance indicates this requires caution and potential adjustments to the dosage plan.

Q: Are there any long-term effects of taking Imatinib Denk that people commonly report?

The official product information mentions that long-term use is associated with potential toxicities to major organs, including the liver, kidneys, and heart. Other reported long-term effects include problems with thyroid function (hypothyroidism) in some patients and growth retardation in pediatric patients. Regular monitoring helps manage these potential concerns.

Q: What kind of changes in blood cell counts can happen while using Imatinib Denk?

The medicine frequently causes myelosuppression, which is a reduction in the body’s ability to produce new blood cells. This results in low blood counts, specifically neutropenia (low white blood cells), anemia (low red blood cells), and thrombocytopenia (low platelets). This common effect is typically managed through frequent monitoring of complete blood counts.

Q: Can Imatinib Denk cause problems with my liver or kidneys?

Due to this potential risk, regulatory documents state that liver function should be measured and monitored before treatment begins and regularly throughout the course of therapy. Imatinib can cause severe hepatotoxicity (liver damage) and has been associated with the potential for renal toxicity (kidney damage).

Q: What are the signs of a serious side effect, like severe skin reactions or internal bleeding?

Serious side effects to watch for include signs of internal bleeding, such as blood in vomit or black, tarry stools. Additionally, severe dermatologic reactions (skin reactions) like painful, blistering, or peeling skin should be considered serious. Official safety guidance advises seeking immediate medical assistance if these signs occur.

Q: Does Imatinib Denk affect fertility in men or women?

The medicine is noted to have a potential for embryo-fetal toxicity and can cause harm to an unborn baby. While direct effects on the ability to conceive (fertility) for men or women are not fully detailed in regulatory labels, official information indicates that women of reproductive potential are generally required to use effective contraception during treatment and for a specified time afterward.

Q: Is Imatinib Denk the only drug used for Chronic Myeloid Leukemia (CML), or are there others?

No, Imatinib is not the only drug used for CML. While it was a landmark first-generation treatment, clinical trials have been conducted comparing it to both previous standard therapies and newer Tyrosine Kinase Inhibitors (TKIs). This indicates that multiple approved treatment options exist for CML.

Q: How quickly can a person expect Imatinib Denk to start working?

Based on data from clinical trials in patients with chronic phase CML, the time until the first measurable sign of the medicine working, known as hematologic response, was approximately one month. Achieving a complete response, such as a cytogenetic response, typically requires a longer period of time.

Q: What is the main difference between Imatinib Denk and other similar targeted therapies (TKIs)?

Imatinib is defined as a first-generation TKI (Tyrosine Kinase Inhibitor). It works by blocking the activity of specific molecular targets, primarily the BCR-ABL fusion protein. The differences from newer TKIs often relate to the specific spectrum of enzyme binding and their ability to overcome certain forms of drug resistance.

Q: Is Imatinib Denk a cure, or does it mainly control the condition?

For most of the approved conditions, the official product information indicates that the treatment is typically continued long-term until disease progression. Clinical studies measure outcomes related to long-term disease control, such as Overall Survival and Recurrence-Free Survival, rather than a definitive cure.

Q: Are there research studies looking into new uses for Imatinib Denk?

Regulatory documents list the conditions for which the medicine is approved and the clinical evidence supporting those uses. While research is an ongoing process, the official drug label is restricted to providing safety and dosing information only for the approved indications (CML, GIST, etc.) supported by existing evidence.

Q: Can Imatinib Denk cause eye problems, like blurred vision or swelling around the eyes?

Yes, official product information lists edema (swelling) as a common side effect, which can frequently affect the area around the eyes (periorbital edema). Additionally, the label cautions that patients should be careful when driving or operating machinery due to reports of blurred vision and dizziness.

Q: Why do some people experience hair loss or changes in skin/nails when taking Imatinib Denk?

Regulatory documents list hair loss (alopecia) and various dermatologic reactions (skin issues) as reported side effects of the medicine. These are acknowledged adverse reactions of the drug. However, the exact molecular reason for these specific changes in the skin, hair, and nails is not typically detailed in patient-focused regulatory information.

Q: Does Imatinib Denk interact with hormone therapies or birth control pills?

Imatinib is known to inhibit the CYP3A4 enzyme, which is responsible for breaking down many other medications, including most oral contraceptives and some hormone therapies. This means Imatinib can cause increased concentrations of these co-administered medicines. Consultation with a healthcare provider is recommended to determine the specific interaction risk.

Q: Does Imatinib Denk have potential interactions with common dental procedures or anesthetics?

Official safety guidance advises patients to consult their medical doctor before having dental work or elective surgery. This is due to the potential for bleeding complications, especially when the medicine has caused low blood cell counts, which can increase the risk of bruising or bleeding.

Q: What is a Tumor Lysis Syndrome, and is it a risk when starting Imatinib Denk?

Tumor Lysis Syndrome (TLS) is a potential risk that may occur early in the treatment of some patients. It involves the rapid breakdown of a large number of cancer cells, releasing their contents into the blood. Healthcare providers may employ measures such as advising adequate hydration to manage this potential risk.

Q: Is it normal for Imatinib Denk to cause or worsen symptoms of depression?

The medicine's official adverse reaction lists document side effects related to the central nervous system, including Insomnia and Depression. These mood-related symptoms are acknowledged adverse reactions of the medicine. Official information suggests patients communicate any new or worsening mood changes to their healthcare provider.

Q: Can Imatinib Denk cause diarrhea, and what is the recommendation for managing it?

Diarrhea is listed as a Very Common side effect, meaning it is often reported. Official regulatory labels advise that if a severe adverse reaction, such as severe diarrhea, develops, treatment may be temporarily withheld (stopped) until the event resolves. It may then be resumed at an appropriate dose, as determined by a healthcare provider.

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How should Imatinib Denk be stored and disposed of?

How to Store and Dispose of Imatinib Denk

The storage and disposal of Imatinib Denk must follow official regulatory requirements to ensure product integrity and environmental safety.


Storage Requirements

Imatinib Denk must be stored at a temperature that does not exceed 30 C. The tablets must remain in the original container (blister pack) to ensure protection from moisture and light. For safety, the medicine must always be kept out of the sight and reach of children.


Disposal Instructions

Any unused, unwanted, or expired Imatinib Denk must be disposed of according to local requirements. It is essential to consult with a pharmacist or nurse for proper guidance, as the product should not be thrown into household waste or released into the environment, such as by entering drains or wastewater.

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

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