Pyrotinib is a small-molecule targeted drug primarily indicated for the treatment of HER2-positive breast cancer. Its common adverse reactions mainly include diarrhea, skin reactions, hematological abnormalities, and hepatic dysfunction. Dosage adjustment or symptomatic treatment should be performed under the guidance of a physician based on specific symptoms.
Common Adverse Reactions and Clinical Manifestations
Diarrhea
It has a high incidence rate and may be accompanied by abdominal pain and dehydration, which can lead to electrolyte imbalance in severe cases. Mild to moderate diarrhea can be relieved by dietary adjustments and fluid replacement. For severe cases, drug administration should be suspended and medical advice should be sought immediately.
Skin Reactions
Manifestations include rash, pruritus, and hand-foot syndrome (characterized by redness, swelling, and desquamation of the palms and soles). Daily precautions include avoiding prolonged sun exposure and using mild skin care products. Topical or oral medications are required for severe conditions.
Gastrointestinal Discomfort
Symptoms such as nausea, vomiting, and decreased appetite can be alleviated by eating small, frequent meals and taking oral antiemetics.
Hematological Abnormalities
These include leukopenia and neutropenia. Regular monitoring of complete blood count (CBC) is necessary, and leukopoietic agents should be administered when appropriate.
Hepatic Dysfunction
Elevated transaminase levels may occur. Regular liver function tests are required. Hepatoprotective therapy or dosage adjustment should be implemented if abnormalities are detected.
Severe Adverse Reactions and Management
Interstitial Lung Disease (rare)
Clinical manifestations include cough and dyspnea. Immediate drug discontinuation and medical consultation are required once such symptoms occur.
Cardiotoxicity
Palpitations and chest tightness may develop. Regular cardiac function monitoring is essential, especially for patients with a history of heart disease.
Medication Precautions
Dosage adjustment as per medical advice
Physicians may reduce the dosage or suspend the medication based on the severity of adverse reactions.
Regular monitoring
During the treatment period, regular examinations including complete blood count, liver and kidney function tests, and electrocardiogram (ECG) are required.
Prompt medical attention
Immediate medical consultation is necessary if persistent diarrhea, dyspnea, jaundice, or severe skin ulceration occurs.
Daily Patient Management
Maintain a light diet and avoid irritating foods to prevent exacerbation of gastrointestinal reactions.
Pay attention to skin moisturization, avoid scratching rash areas to prevent secondary infection.
Record daily changes in symptoms and provide a detailed feedback to the physician during follow-up visits.
Pyrotinib is a prescription-only medication. It must be used strictly in accordance with the physician's instructions. Dosage adjustment or drug discontinuation without authorization is prohibited. In case of any discomfort during treatment, patients should promptly communicate with the attending physician to ensure the safety and efficacy of medication.
