Trastuzumab Side Effects and Warnings

What are the precautions when taking this medicine?

• If you are 65 or older, use this medicine with caution. You could have more side effects.

• If you have heart disease, talk with healthcare provider.

• If you have lung disease, talk with healthcare provider.

• Tell dentists, surgeons, and other healthcare providers that you use this medicine.

• Check medicines with healthcare provider. This medicine may not mix well with other medicines.

• Use birth control that you can trust to prevent pregnancy while taking this medicine.

What are some possible side effects of this medicine?

• Flu-like symptoms. These include headache, weakness, fever, shakes, aches, pains, and sweating. Mild pain medicine may help.

• Risk of infection. Avoid people with infections, colds, or flu.

• Nausea or vomiting. Small frequent meals, frequent mouth care, sucking hard, sugar-free candy, or chewing sugar-free gum may help.

• Feeling dizzy. Rise slowly over several minutes from sitting or lying position. Be careful climbing.

• Feeling tired or weak.

• Headache.

• Not hungry.

• Diarrhea.

• Belly pain.

• Rash.

• Cough.

• Runny nose.

Reasons to call healthcare provider immediately

• If you suspect an overdose, call your local poison control center or emergency department immediately.

• Signs of a life-threatening reaction. These include wheezing; chest tightness; fever; itching; bad cough; blue skin color; fits; or swelling of face, lips, tongue, or throat.

• Signs or symptoms of infection. These include a fever of 100.5 degrees or higher, chills, severe sore throat, ear or sinus pain, cough, increased sputum or change in color, painful urination, mouth sores, wound that will not heal, or anal itching or pain.

• Difficulty breathing.

• Chest pain or pressure or fast heartbeat.

• Severe dizziness or passing out.

• Severe headache.

• Severe nausea or vomiting.

• Severe diarrhea.

• Significant weight gain.

• Unusual bruising or bleeding.

• Feeling extremely tired or weak.

• Any rash.

• No improvement in condition or feeling worse.