Potential Risks of
Treatment
Potential Risks of
Treatment
What is the most important information I should know about ENHERTU?
ENHERTU can cause side effects.
Some serious or life-threatening side effects may affect your lungs, heart, or white blood cell count, affecting
your ability to fight infection.
Pay special attention to new or worsening symptoms as they may be related to:
Call or see your healthcare provider right away if you develop any of the following signs and symptoms or if these symptoms get worse:
- Cough
- Trouble breathing or shortness of breath
- Fever
- Other new or worsening breathing symptoms (e.g., chest tightness, wheezing)
If lung problems develop, your healthcare provider may treat you with corticosteroid medicines.
- Low white blood cell counts are common with ENHERTU and can sometimes be severe
- Your healthcare provider will check your white blood cell counts before starting ENHERTU and before starting each dose
- Tell your healthcare provider right away if you develop any signs or symptoms of an infection or have fever or chills during treatment with ENHERTU
Your healthcare provider will check your heart function before starting treatment with ENHERTU. Tell your healthcare provider right away if you get any of the following signs and symptoms:
- New or worsening shortness of breath
- Coughing
- Feeling tired
- Swelling of your ankles or legs
- Irregular heartbeat
- Sudden weight gain
- Dizziness or feeling light-headed
- Loss of consciousness
Tell your healthcare provider right away if you become pregnant or think you might be pregnant during treatment with ENHERTU
- If you are able to become pregnant, your healthcare provider should do a pregnancy test before you start treatment with ENHERTU
- Females who are able to become pregnant should use effective birth control (contraception) during treatment with ENHERTU and for at least 7 months after the last dose
- Males who have female partners that are able to become pregnant should use effective birth control (contraception) during treatment with ENHERTU and for at least 4 months after the
last dose
Your healthcare provider will check you for these problems during your treatment with ENHERTU. Your healthcare provider may reduce your dose, delay treatment, or completely stop treatment with ENHERTU if you have severe side effects.
Will my healthcare provider adjust my dose if I have side effects?
To help manage side effects, your healthcare provider may:
Lower your dose
Delay your dose
Stop ENHERTU
What can I do to help manage side effects?
Tips to help with side effects
- Try to eat 5 or 6 small meals and snacks each day instead of 3 large meals
- Eat bland, easy-to-digest food and drinks
- Avoid food and drinks that are too hot or too cold
- Avoid strong smells, if possible
- If you are vomiting, take deep, slow breaths and, if possible, get fresh air
- Try to eat 5 or 6 small meals and snacks each day instead of 3 large meals
- Eat foods that are low in fiber
- Drink clear liquids to replace lost fluids. Check with your healthcare provider to figure out how much and what types of fluid might be best
- Try activities such as meditation, which helps with relaxation and decreases stress
- Plan rest time and try not to do too much
- Try regular exercise during times when your energy level is high (according to your healthcare provider’s approval)
- Let other people help you with everyday tasks
- Talk to your healthcare provider about the possibility of hair loss
- Consider cutting your hair short to feel more in control of hair loss
- Be gentle when you wash your hair. Use a mild shampoo, such as baby shampoo
- Avoid items such as electric hair dryers, hairspray, hair dyes, products to perm or relax hair, hair bands, and/or clips that can hurt your scalp
- If you plan on buying a wig, you should do so while you still have hair
- Protect your scalp
- Cover your head to stay warm. You may feel colder if you lose your hair
- Sleep on a satin pillow case. Satin creates less friction and may be more comfortable
What are the possible side effects of ENHERTU?
ENHERTU can cause serious side effects.
See "What is the most important information I should know about ENHERTU?".
The most common side effects of ENHERTU, when used in people with breast cancer, include:
- Nausea
- Low white blood cell counts
- Low red blood cell counts
- Feeling tired
- Vomiting
- Hair loss
- Increased liver function tests
- Low platelet counts
- Constipation
- Decreased appetite
- Diarrhea
- Low levels of blood potassium
- Cough
The most common side effects of ENHERTU, when used in people with stomach cancer, include:
- Low red blood cell counts
- Low white blood cell counts
- Low platelet counts
- Nausea
- Decreased appetite
- Increased liver function tests
- Feeling tired
- Diarrhea
- Low levels of blood potassium
- Vomiting
- Constipation
- Fever
- Hair loss
ENHERTU may cause fertility problems in males, which may affect the ability to father children. Talk to your healthcare provider if you have concerns about fertility.
These are not all of the possible side effects of ENHERTU. Call your doctor for medical advice about side effects. You may report side effects to Daiichi Sankyo at 1-877-437-7763 or to FDA at 1-800-FDA-1088.
Before you receive ENHERTU, tell your healthcare provider about all of your medical conditions, including if you:
- Have lung or breathing problems.
- Have signs or symptoms of an infection.
- Have or have had any heart problems.
- Are breastfeeding or plan to breastfeed. It is not known if ENHERTU passes into your breast milk. Do not breastfeed during treatment with ENHERTU and for 7 months after the last dose.
Tell your healthcare provider about all the medicines you take, including prescription and over-the-counter medicines, vitamins, and herbal supplements.
Harm to your unborn baby. Tell your healthcare provider right away if you become pregnant or think you might be pregnant during treatment with ENHERTU.
- If you are able to become pregnant, your healthcare provider should do a pregnancy test before you start treatment with ENHERTU.
- Females who are able to become pregnant should use effective birth control (contraception) during treatment with ENHERTU and for at least 7 months after the last dose.
- Males who have female partners that are able to become pregnant should use effective birth control (contraception) during treatment with ENHERTU and for at least 4 months after the last dose.
Managing side effects with ENHERTU
Let your healthcare provider know right away if you are experiencing any side effects.
Your healthcare provider may take steps to help manage your side effects, including:
- Slowing down, interrupting, or stopping ENHERTU treatment
- Prescribing other medicines to help lessen side effects
- Recommending lifestyle changes
Are there resources that I or my caregiver might find helpful?
