Possible Side Effects
VYLOY (zolbetuximab-clzb) may cause serious side effects, including:
- Allergic reactions, including anaphylaxis and infusion-related reactions. Allergic reactions are common during treatment with VYLOY and can sometimes be serious. Serious allergic reactions can happen during or after your VYLOY infusion, including life-threatening allergic reactions and serious infusion-related reactions that may lead to death. Your healthcare provider will monitor you during your infusion and for 2 hours after or longer if needed. Tell your healthcare provider or get emergency medical help right away if you get any of the following symptoms of a serious allergic reaction during or after your infusion of VYLOY:
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- itchy, raised bumps on the skin (hives)
- coughing that does not go away
- nausea or vomiting
- stomach (abdominal) pain
- increased saliva
- breathing problems such as wheezing
- throat tightness or change in voice
- fever
- chest discomfort
- chills or shaking
- back pain
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- Severe nausea and vomiting. Nausea and vomiting are common during treatment with VYLOY and can sometimes be severe. Nausea and vomiting happened more often during the first treatment cycle. Before you receive each VYLOY infusion, your healthcare provider will give you medicines to help prevent nausea and vomiting. Tell your healthcare provider right away if nausea or vomiting does not go away or gets worse.
The most common side effects of VYLOY include:
- tiredness
- decreased appetite
- diarrhea
- tingling or numbness of the arms or legs
- stomach (abdominal) pain
- constipation
- decreased weight
- fever
- decreased white blood cells, red blood cells and platelets
- decreased protein (albumin) in the blood
- changes in kidney function tests
- changes in blood sugar (glucose)
- changes in liver functions tests
- changes in body salts (electrolytes) in your blood
Your healthcare provider may slow the rate of your infusion, temporarily stop, or completely stop treatment with VYLOY if you have certain side effects.