Binimetinib Side Effects

Medically reviewed by Drugs.com. Last updated on Dec 17, 2024.

Applies to binimetinib: oral tablet.

Serious side effects of binimetinib

Along with its needed effects, binimetinib may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.

Check with your doctor immediately if any of the following side effects occur while taking binimetinib:

More common side effects

• bleeding gums
• bloating or swelling of the face, arms, hands, lower legs, or feet
• blurred vision or any other change in vision
• chest pain or tightness
• coughing up blood
• decreased urine output
• difficulty in breathing or swallowing
• dilated neck veins
• dizziness
• fever
• headache
• hoarseness
• increased menstrual flow or vaginal bleeding
• irregular breathing
• irregular heartbeat
• irritation
• itching, hives, skin rash
• joint pain, stiffness, or swelling
• nervousness
• nosebleed
• paralysis
• pounding in the ears
• prolonged bleeding from cuts
• rapid weight gain
• red or black, tarry stools
• red or dark brown urine
• redness of the skin
• slow or fast heartbeat
• stomach cramps
• tenderness
• tingling of the hands or feet
• trouble seeing
• unusual tiredness or weakness
• unusual weight gain or loss
• watery or bloody diarrhea

Rare side effects

• dark urine
• muscle cramps, spasms, pain, or stiffness

Other side effects of binimetinib

Some side effects of binimetinib may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects.

Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:

More common side effects

• constipation
• diarrhea
• nausea
• stomach pain
• vomiting

For healthcare professionals

Applies to binimetinib: oral tablet.

Hematologic adverse events

• Very common (10% or more): Anemia (36%), hemorrhage (19%), leukopenia (13%), lymphoma (13%), neutropenia (13%)
• Common (1% to 10%): Venous thromboembolism (VTE)^[Ref]

Hypersensitivity

• Common (1% to 10%): Hypersensitivity^[Ref]

Musculoskeletal

• Uncommon (0.1% to 1%): Rhabdomyolysis^[Ref]

Ocular

• Very common (10% or more): Retinopathy (20%), visual impairment (20%)
• Common (1% to 10%): Retinal detachment, macular edema, uveitis
• Uncommon (0.1% to 1%): Retinal vein occlusion^[Ref]

Metabolic

• Very common (10% or more): Hyponatremia (18%), peripheral edema (13%)^[Ref]

Hepatic

• Very common (10% or more): Increased gamma glutamyl transferase (45%)
• Common (1% to 10%): Alanine aminotransferase (ALT) increased, aspartate aminotransferase (AST) increased
• Uncommon (0.1% to 1%): Alkaline phosphatase increased^[Ref]

Respiratory

• Uncommon (0.1% to 1%): Interstitial lung disease^[Ref]

Other

• Very common (10% or more): Fatigue (43%), pyrexia (18%)^[Ref]

Nervous system

• Very common (10% or more): Dizziness (15%)^[Ref]

Renal

• Very common (10% or more): Increased creatinine (93%), increased creatine phosphokinase (58%)^[Ref]

Cardiovascular

• Very common (10% or more): Hypertension (11%)
• Common (1% to 10%): Cardiomyopathy, fatal intracranial hemorrhage (in the setting of new or progressive brain metastases)^[Ref]

Dermatologic

• Very common (10% or more): Rash (22%)
• Common (1% to 10%): Panniculitis^[Ref]

Gastrointestinal

• Very common (10% or more): Nausea (41%), diarrhea (36%), vomiting (30%), abdominal pain (28%), constipation (22%)
• Common (1% to 10%): Rectal hemorrhage, hematochezia, hemorrhoidal hemorrhage, colitis^[Ref]

Frequently asked questions

• What is Mektovi used to treat?

Further information

Binimetinib side effects can vary depending on the individual. Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

Note: Medication side effects may be underreported. If you are experiencing side effects that are not listed, submit a report to the FDA by following this guide.

Medical Disclaimer