What adverse reactions may zotuximab cause? How can patients monitor and manage these reactions?

Zolbetuximab (zolbetuximab) is a targeted immunotherapy drug used to treat certain types of cancer, especially HER2-negative, gastric cancer and gastroesophageal junction cancer. As an antibody drug, zotuximab blocks the growth and spread of tumor cells by binding to the CLDN18.2 protein on the surface of cancer cells. However, like many anticancer drugs, zotuximab may cause some adverse effects. Patients need to be closely monitored for side effects while receiving this treatment and take appropriate steps to manage them.

1. Common adverse reactions

Zotuximab may cause some common side effects, including but not limited to:

Allergic reactions: Some patients may experience mild to moderate allergic reactions, manifesting as rash, itching, fever, chills, etc. In severe cases, anaphylactic shock may occur, with symptoms such as difficulty breathing, pale complexion, and hypotension. Treatment needs to be stopped immediately and emergency treatment required.

Gastrointestinal reactions: One of the most common side effects of zotuximab is gastrointestinal reactions, such as nausea, vomiting, diarrhea, etc. These symptoms are often related to the immune effects of the drug and irritation of the gastrointestinal tract. Some patients may suffer from loss of appetite or constipation, which affects their normal life and weight.

Abnormal liver function: Zotuximab may cause an increase in liver enzymes, such as abnormalities in ALT, AST and other indicators, which may cause liver damage. Patients need to regularly monitor liver function during treatment to detect possible liver problems in time.

Fatigue: Patients may experience fatigue or weakness due to an immune response or gastrointestinal discomfort caused by the drug, which has an impact on daily life.

2. Serious adverse reactions

In addition to common side effects, zotuximab may cause some serious adverse reactions, including:

Immune-related adverse reactions: Zotuximab, as an immunotherapy drug, may trigger some immune system overreactions, manifesting as immune pneumonia, colitis, hepatitis or kidney problems. Some patients may develop immune reactions such as rashes and joint pain, which may even affect their lives. Immune adverse reactions usually require treatment to be suspended and medications to be adjusted or immunosuppressants to be used according to the condition.

Pulmonary complications: As mentioned above, immune-related pneumonia may occur, manifesting as dyspnea, dry cough, chest pain, etc., and may require hospitalization in severe cases.

3. How to monitor and manage adverse reactions

Patients need to take steps to monitor and manage side effects while taking zotuximab:

Regular examinations and monitoring: Patients should undergo regular blood tests, liver and kidney function tests, and lung function monitoring before and during treatment. Doctors will adjust treatment plans or take preventive measures based on test results.

Report any symptoms of discomfort: Patients should pay close attention to their body reactions, especially symptoms of discomfort such as rash, fever, difficulty breathing, diarrhea, and jaundice. If these symptoms occur, notify your doctor immediately to avoid worsening of symptoms.

Medication Adjustment and Treatment Suspension: If a patient experiences a serious adverse reaction, treatment may need to be suspended or the dose of the medication may need to be adjusted as recommended by the physician. When certain immune-related reactions occur, doctors may choose to use steroids or other immunosuppressive drugs to relieve symptoms.

Management of gastrointestinal symptoms: For gastrointestinal discomfort, patients can make appropriate dietary adjustments, avoid irritating foods, and use anti-nausea or antidiarrheal drugs to relieve discomfort. At the same time, maintaining adequate fluid intake can help improve dehydration problems caused by diarrhea.

4. Lifestyle and dietary advice

During the use of zotuximab, patients should focus on lifestyle adjustments to reduce the impact of side effects:

Reasonable diet: Patients should maintain a balanced diet, choose foods that are easy to digest, low in fat, and low in sugar, and avoid spicy and greasy foods to reduce the burden on the gastrointestinal tract. At the same time, increase the intake of vegetables and fruits to ensure adequate nutritional support.

Adequate rest: Since drugs may cause fatigue, patients should ensure adequate sleep, avoid overexertion, and engage in moderate light exercise to maintain physical vitality.

Maintain mental health: Physical discomfort during cancer treatment may cause psychological stress. Patients should maintain communication with family and friends, seek psychological support, and maintain a positive attitude.

Although zotuximab is an effective immunotherapy drug, it may cause a variety of side effects during treatment. Patients should follow the doctor's advice, conduct regular health monitoring, report discomfort symptoms in a timely manner, and adjust treatment plans as needed. Through reasonable drug management, lifestyle adjustments and psychological support, patients can better cope with adverse reactions and improve treatment effects.

Reference materials:https://www.astellas.com/en/news/29401