What are the side effects of tucatinib? Common adverse reactions and countermeasures

Tucatinib is an oral HER2 tyrosine kinase inhibitor mainly used to treat HER2-positive breast cancer, especially patients with brain metastases. Although tucatinib has significant efficacy in prolonging survival, it may still cause a series of side effects. The following are common adverse reactions and corresponding countermeasures.

1. Diarrhea

Symptoms: Diarrhea is one of the most common adverse reactions of tucatinib, which may manifest as mild to severe diarrhea. In severe cases, it can lead to dehydration and electrolyte imbalance.

Countermeasures:

Mild diarrhea (Grade 1~2): Increase water intake, pay attention to dietary adjustments, and avoid spicy, greasy and high-fiber foods.

Moderate to severe diarrhea (Grade 3 and above): antidiarrheal drugs such as loperamide (loperamide) can be used, and the dose should be suspended or adjusted if necessary.

2. Abnormal liver function

Symptoms: Some patients may experience elevated liver enzymes (ALT, AST) after taking tucatinib, which may lead to liver damage in severe cases.

Countermeasures:

Regularly monitor liver function (test once every 2~3 weeks).

If the liver enzyme elevation exceeds the normal value5 times, it is necessary to consider reducing the dose or suspending the medication, and then evaluate whether to restart treatment after the liver function recovers.

Avoid drinking alcohol and using other drugs that may damage the liver, such as certain antibiotics, antipyretics and analgesics.

3. Nausea and Vomiting

Symptoms: Some patients may experience mild to moderate nausea during medication, sometimes accompanied by vomiting, affecting appetite and nutritional intake.

Countermeasures:

Mild nausea: It is recommended to eat small amounts frequently and avoid greasy and irritating foods. You can consume ginger tea in moderation to relieve symptoms.

Moderate to severe nausea: Consider using antiemetics, such as ondansetron (ondansetron).

Adjust dosage or suspend medication if necessary.

4. Skin rash and hand-foot syndrome

Symptoms: Dry skin, erythema, itching, or pain and peeling of the hands and feet may occur.

Countermeasures:

Mild symptoms: Use moisturizer, anti-inflammatory cream, such as skin care products containing urea or vitamin E.

Moderate and above: Use glucocorticoid ointment or antihistamines, and adjust the dose or suspend medication if necessary.

5. Fatigue and weakness

Symptoms: Some patients may experience obvious fatigue, which affects daily activities.

Countermeasures:

Get adequate rest, maintain a regular schedule, and avoid overexertion.

Maintain a balanced diet and consume more foods rich in protein and vitaminsB groups.

Moderate light exercise, such as walking or yoga, can help improve fatigue.

6. Hypertension

Symptoms: Some patients may experience increased blood pressure after taking tucatinib, and in severe cases, the risk of cardiovascular disease may increase.

Countermeasures:

Monitor blood pressure regularly and adjust the antihypertensive drug regimen if it rises significantly.

Avoid high-salt diets and reduce caffeine and alcohol intake.

Patients with severe hypertension need to suspend or adjust the tucatinib dose.

7. Other rare side effects

Stomatitis: This can be relieved by gargling with warm water and avoiding irritating foods.

Decreased appetite: Encourage small meals more frequently and increase high-calorie, high-protein diet.

Abnormal renal function: Monitor renal function indicators regularly and adjust dosage if necessary.

Although Tucatinib can effectively improveHER2The prognosis of patients with positive breast cancer, but its side effects cannot be ignored. During clinical use, adverse reactions must be closely monitored and targeted measures must be taken to improve patient tolerance and quality of life. If serious adverse reactions occur, you need to seek medical treatment promptly and adjust the treatment plan according to the doctor's instructions.

Reference materials:https://www.tukysa.com/