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What Is Cotellic (Cobimetinib)?

What Is Cotellic (Cobimetinib)?

Cotellic (Cobimetinib) is a targeted cancer therapy used to treat certain cancers in adults, including advanced melanoma and histiocytic neoplasms. It belongs to a class of medications known as MEK inhibitors, which block specific proteins involved in cancer cell growth and survival.

For histiocytic neoplasms, this medication is used alone. For melanoma, it is taken together with another anticancer medication to treat tumors that have a specific genetic change called a BRAF mutation.

Quick Facts About Cotellic

Quick Facts About Cotellic

Below is a quick overview of important Cotellic facts for patients and caregivers:

Brand NameCotellic
Active IngredientCobimetinib
Strengths Available20 mg
Drug ClassMEK (kinase) inhibitor
Available FormTablets
FDA-ApprovedYes
Primary UseAdvanced melanoma, histiocytic neoplasms
Route of AdministrationOral
StorageStore at room temperature (below 30°C / 86°F)

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All Cotellic orders require a valid prescription and are fulfilled by licensed Canadian pharmacies that follow strict quality and safety standards.

What Is Cotellic Used For?

What Is Cotellic Used For?

Cotellic is prescribed in combination with vemurafenib to treat certain types of melanoma skin cancer with specific BRAF gene mutations. It is primarily used for:

Unresectable or Metastatic Melanoma:

Cotellic is used in combination with vemurafenib to treat melanoma that:

  • Cannot be removed by surgery (unresectable)
  • Has spread to other parts of the body (metastatic)
  • Contains a BRAF V600E or V600K gene mutation

Histiocytic Neoplasms:

Cotellic is approved as a single agent for the treatment of adult patients with certain histiocytic neoplasms.

Note: For melanoma treatment, testing for BRAF V600E or V600K mutations is required before starting Cotellic.

What Is the Mechanism of Action of Cotellic 20 mg?

What Is the Mechanism of Action of Cotellic 20 mg?

Cotellic 20 mg works by blocking MEK1 and MEK2 enzymes that are part of a signaling pathway responsible for cancer cell growth. In tumors with BRAF mutations, this pathway becomes overactive and causes uncontrolled cancer progression. By inhibiting MEK proteins, Cotellic helps slow tumor growth and improve treatment response, especially when combined with vemurafenib.

Cotellic Dosage Guide

Cotellic Dosage Guide

The recommended dosage of Cotellic is taken in repeating 28-day treatment cycles as shown below:

Treatment PeriodRecommended Dosage
Days 1-2160 mg once daily (three 20 mg tablets taken by mouth)
Days 22-28No medication (7 days off treatment)

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This 21-day-on/7-day-off cycle is continued until disease progression or unacceptable side effects occur.

Important Dosage Information

Here is some important dosage information:

  • Cotellic is taken orally once daily.
  • The tablets may be taken with or without food.
  • Always follow your healthcare provider’s instructions exactly.

Missed dose or vomiting:

If a dose is missed or vomiting occurs after taking Cotellic, do not take an additional dose. Resume treatment with the next scheduled dose.

Dose Adjustments

In some cases, doctors may reduce the dosage due to side effects or drug interactions:

Adjustment LevelModified Dose
First reduction40 mg once daily
Second reduction20 mg once daily
If unable to tolerate 20 mgCotellic is permanently discontinued

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Dose changes are determined by a healthcare provider based on safety and tolerance.

What Are the Side Effects of Cotellic?

What Are the Side Effects of Cotellic?

Cotellic may cause different side effects depending on the condition being treated. Some effects are common and mild, while others may be serious and require medical attention. Commonly reported Cotellic side effects are listed below:

Common Side Effects in Melanoma Patients

In adults treated for unresectable or metastatic melanoma, the most commonly reported side effects include:

  • Diarrhea
  • Sensitivity to sunlight (photosensitivity)
  • Nausea
  • Fever
  • Vomiting

Common Side Effects in Histiocytic Neoplasms Patients

In adults treated for histiocytic neoplasms, commonly reported side effects include:

  • Acne-like skin bumps (red or pus-filled) on the face, scalp, chest, or upper back
  • Diarrhea
  • Infections
  • Fatigue or tiredness
  • Nausea
  • Swelling of the arms, legs, feet, or other body areas
  • Dry skin
  • Skin rash (flat or raised red areas)
  • Itching
  • Indigestion or heartburn
  • Vomiting
  • Urinary tract infections
  • Lung-related problems such as shortness of breath

Rare or Serious Side Effects

Although these are less common, some side effects can be serious. Seek immediate medical care if you experience:

  • Development of new skin cancers
  • Unusual or severe bleeding (blood in urine or stool, vomiting blood, severe headaches)
  • Heart problems (shortness of breath, swelling in ankles or feet, fast heartbeat, extreme fatigue)
  • Vision changes or eye damage (blurred vision, partial or complete vision loss, halos around lights)
  • Severe skin reactions (widespread rash, blistering, peeling skin)
  • Liver injury (yellowing of skin or eyes, dark urine, severe weakness)
  • Muscle damage or rhabdomyolysis (muscle pain, weakness, dark-colored urine)

If any serious side effects are suspected, stop taking the medication and seek immediate medical support or contact a poison control center for guidance.

Important Safety Information for Cotellic

Important Safety Information for Cotellic

Cotellic is a targeted cancer therapy that may cause serious side effects. Patients should be monitored during treatment to reduce risks and ensure safe use.

What Precautions Should Be Taken While Using Cotellic?

To ensure effectiveness and safety during treatment, patients should follow these precautions:

  • Regular skin examinations are required before treatment and every few months during therapy to detect new cancers early
  • Heart function should be tested before starting treatment and monitored regularly
  • Eye exams should be performed periodically and whenever vision changes occur
  • Liver function tests should be done before and during treatment
  • Blood tests may be needed to monitor muscle health and kidney function
  • Inform your healthcare provider about all supplements and medications you take
  • Use effective birth control during treatment and for at least 2 weeks after the last dose

What Are the Warnings for Cotellic?

This medication may lead to the following serious medical conditions:

  • Development of new cancers, including skin and internal malignancies
  • Severe bleeding events involving the brain, digestive system, or urinary tract
  • Heart muscle weakening (cardiomyopathy) can reduce heart function
  • Serious skin reactions, including severe rashes and peeling
  • Eye problems such as fluid buildup in the retina or retinal vein blockage
  • Liver damage is indicated by abnormal liver function tests
  • Muscle breakdown (rhabdomyolysis), which may harm the kidneys
  • Extreme sensitivity to sunlight that can cause severe sunburn
  • Harm to an unborn child if used during pregnancy

Seek immediate medical help if any serious symptoms occur.

Sun Safety Tip

Cotellic can make your skin extremely sensitive to sunlight. To protect yourself:

  • Avoid direct sun exposure whenever possible
  • Wear long sleeves, hats, and protective clothing
  • Apply broad-spectrum sunscreen (SPF 30+) and lip balm daily

Pregnancy and Breastfeeding

Cotellic can cause harm to an unborn baby.

  • Use effective birth control during treatment and for at least 2 weeks after the final dose
  • Avoid becoming pregnant while taking this medication

There are no adequate studies in pregnant women, but animal studies showed fetal harm.

Breastfeeding is not recommended during treatment and for 2 weeks after stopping Cotellic, as serious side effects in infants may occur. Always consult a healthcare provider before use.

Drug Interactions for Cotellic

Drug Interactions for Cotellic

Cotellic can interact with medications that affect certain liver enzymes (CYP3A), which may increase side effects or reduce treatment effectiveness. Always consult a healthcare provider before combining Cotellic with other medications. Medications that may interact include:

  • Strong or moderate CYP3A inhibitors (such as itraconazole and certain antibiotics like erythromycin or ciprofloxacin)
  • Strong or moderate CYP3A inducers (such as carbamazepine, phenytoin, rifampin, efavirenz, and St. John’s Wort)

Some medications can significantly increase Cotellic levels in the body, while others may lower its effectiveness.

Possible Alternatives to Cotellic

Depending on the type of cancer and genetic mutation involved, healthcare providers may consider other targeted therapy options.

Alternative ProductActive IngredientCommon UseForm
MektoviBinimetinibBRAF-mutated melanomaTablets
MekinistTrametinibBRAF-related cancersTablets
Braftovi combinationsEncorafenib with MEK inhibitorsAdvanced melanomaTablets

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Note: Treatment choice depends on genetic test results, cancer type, and the individual patient's response. A doctor should determine the most appropriate alternative.

Why Buy Cotellic from Polar Bear Meds

Why Buy Cotellic from Polar Bear Meds

Buying prescription cancer medications from local U.S. pharmacies can be extremely expensive. Ordering Cotellic online from Polar Bear Meds helps reduce overall treatment costs while maintaining quality and safety standards.

  • Get Cotellic at significantly lower prices than many U.S. retail pharmacies.
  • All medications are dispensed by licensed, reputable Canadian pharmacies.
  • Guaranteed authentic and quality-controlled products.
  • Fast and secure shipping across the United States, typically within 3-5 business days via Xpress Post.
  • Discreet packaging with order tracking for added assurance.
  • Simple online ordering with easy prescription upload.
  • Transparent pricing with no hidden fees.
  • Additional savings are available with the coupon code WELCOMEPB10, which provides 10% off your first order.
  • Dedicated customer support team to assist with prescriptions, orders, and delivery questions.

Note: A valid prescription from a licensed healthcare provider is required to purchase Cotellic 20 mg.

Important Disclaimer

Important Disclaimer

This content is for informational purposes only and does not replace expert medical guidance, diagnosis, or treatment. Cotellic is a prescription medication used to treat certain types of melanoma skin cancer. Always consult an authorized healthcare professional before starting, stopping, or changing the dosage of Cotellic. Individual results, side effects, and dosing needs may vary.

Cotellic FAQs

Cotellic FAQs

Dr. Jackson Miller

Medically Reviewed by Dr. Jackson Miller (M.D)

Dr. Jackson Miller is a board-certified medicine physician & hospitalist. He is a healthcare professional with a strong background in patient care. With years of experience and a patient-first approach, he believes the foundation of good health is a patient who feels informed and empowered. He contributes to medical content review, drawing on his background in clinical practice and patient education. He focuses on presenting health information in a clear, accurate, and accessible way to help readers make informed decisions. His work emphasizes clarity, evidence-based guidance, and understandable explanations of medical topics.

Find Dr. Jackson Miller on:LinkedIn

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