Entrectinib Side Effects: Cognitive Impairment, Dizziness, and What Patients Can Expect

Lucius Pharmaceuticals Entrectinib is a targeted anticancer drug primarily used to treat solid tumors and lymphomas carrying specific gene mutations. Common side effects include fatigue, dizziness, and constipation; in severe cases, it may cause liver damage or heart problems. Strict adherence to doctor's instructions and regular monitoring of relevant indicators are essential during treatment.

I. Common Side Effects

Gastrointestinal Reactions: Such as constipation, nausea, diarrhea, and decreased appetite, which can usually be relieved by adjusting diet or medication.

Nervous System Symptoms: Dizziness, headache, and paresthesia (such as numbness or tingling) are relatively common, mostly mild to moderate.

Systemic Malaise: Fatigue, weakness, muscle or joint pain, which may affect daily activities.

Metabolic Abnormalities: May cause elevated serum creatine kinase and hypophosphatemia, requiring regular electrolyte monitoring.

II. Serious Side Effects (Requires Immediate Medical Attention)

Liver Damage: Manifests as jaundice, dark urine, and abdominal pain, requiring monitoring of transaminase and bilirubin levels through liver function tests.

Cardiotoxicity: Includes QT interval prolongation, arrhythmia, and heart failure, potentially causing symptoms such as chest pain and dyspnea.

Neurotoxicity: Such as severe peripheral neuropathy or cognitive impairment (memory loss, confusion).

III. Other Potential Risks 

Visual problems: Blurred vision or flashes of light, possibly related to retinopathy.

Weight changes: Some patients experience significant weight gain or loss.

Allergic reactions: Rare but should be monitored, such as rash, itching, and facial swelling.

IV. Precautions for Use

Dosage adjustment as directed by your doctor: Depending on the severity of side effects, your doctor may suspend, reduce, or discontinue treatment.

Drug interactions: Avoid concomitant use with potent CYP3A4 inhibitors or inducers, as this may affect efficacy or toxicity.

Special populations: Contraindicated in pregnant women (risk to the fetus); breastfeeding should be discontinued during lactation.

V. Medical Guidance

During treatment, liver function tests, electrocardiograms, and complete blood counts should be performed every 2-4 weeks. If persistent vomiting, difficulty breathing, severe headaches, or palpitations occur, contact your doctor immediately. Do not adjust the medication regimen or dosage on your own.