Fam-trastuzumab deruxtecan-nxki

Generic name: Fam-trastuzumab Deruxtecan-nxki
Drug class: HER2 inhibitors

Usage of Fam-trastuzumab deruxtecan-nxki

Fam-trastuzumab deruxtecan-nxki injection is used to treat HER2-positive metastatic (cancer that has spread to other parts of the body) or unresectable (cancer that cannot be removed with surgery) breast cancer in patients who have previously received an anti-HER2 breast cancer treatment for metastatic disease or have breast cancer that has come back during or within 6 months of completing treatment for early-stage breast cancer.

Fam-trastuzumab deruxtecan-nxki injection is also used to treat HER2-low metastatic (cancer that has spread to other parts of the body) or unresectable (cancer that cannot be removed with surgery) breast cancer in patients who have previously received treatment for metastatic disease or have breast cancer that has come back during or within 6 months of completing treatment (after surgery).

Fam-trastuzumab deruxtecan-nxki injection is also used to treat metastatic (cancer that has spread to other parts of the body) or unresectable (cancer that cannot be removed with surgery) non-small cell lung cancer (NSCLC) in patients whose cancer has an abnormal HER2 gene and who have previously received treatment.

Fam-trastuzumab deruxtecan-nxki injection is also used to treat HER2-positive metastatic (cancer that has spread to other parts of the body) or locally advanced (cancer that has spread to areas near the stomach) stomach cancer called gastric or gastroesophageal junction (GEJ) adenocarcinoma in patients who have previously received trastuzumab-based regimen.

Your doctor will test for the presence of the HER2 gene. HER2 protein is produced by some tumors. Fam-trastuzumab deruxtecan-nxki interferes with the growth of this protein which also prevents tumor growth. The tumor cells will then be destroyed by the body.

This medicine is to be given only by or under the immediate supervision of your doctor.

Fam-trastuzumab deruxtecan-nxki side effects

Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.

Check with your doctor or nurse immediately if any of the following side effects occur:

More common

Black, tarry stools

bloody nose

bone or muscle pain

burning, numbness, tingling, or painful sensations

chest pain or tightness

chills

cough

decreased urine output

difficult breathing

dilated neck veins

dry mouth

fever

general feeling of discomfort or illness

increased thirst

irregular breathing

irregular heartbeat

loss of appetite

lower back or side pain

mood changes

muscle cramps

nausea or vomiting

numbness or tingling in the hands, feet, or lips

painful or difficult urination

pale skin

seizures

sneezing

sore throat

swelling of the face, fingers, feet, or lower legs

thickening of bronChial secretions

trouble breathing

ulcers, sores, or white spots in the mouth

unsteadiness or awkwardness

unusual bleeding or bruising

unusual tiredness or weakness

weakness in the arms, hands, legs, or feet

weight gain

Some side effects may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:

More common

Acid or sour stomach

belching

constipation

decreased appetite

diarrhea

dizziness

dry eyes

hair loss or thinning of the hair

headache

heartburn

indigestion

rash

stomach discomfort, upset, or pain

swelling or inflammation of the mouth

Less common

Bloated

change in taste

darkening of the skin

excess air or gas in the stomach or intestines

full feeling

loss of taste

passing gas

Incidence not known

Bleeding, blistering, burning, coldness, discoloration of the skin, feeling of pressure, hives, infection, inflammation, itching, lumps, numbness, pain, rash, redness, scarring, soreness, stinging, swelling, tenderness, tingling, ulceration, or warmth at the injection site

Other side effects not listed may also occur in some patients. If you notice any other effects, check with your healthcare professional.

Call your doctor for medical advice about side effects. You may report side effects to the FDA at 1-800-FDA-1088.

Before taking Fam-trastuzumab deruxtecan-nxki

In deciding to use a medicine, the risks of taking the medicine must be weighed against the good it will do. This is a decision you and your doctor will make. For this medicine, the following should be considered:

Allergies

Tell your doctor if you have ever HAD any unusual or allergic Reaction to this medicine or any other medicines. Also tell your health care professional if you have any other types of allergies, such as to foods, dyes, preservatives, or animals. For non-prescription products, read the label or package ingredients carefully.

Pediatric

Appropriate studies have not been performed on the relationship of age to the effects of Enhertu® in the pediatric population. Safety and efficacy have not been established.

Geriatric

Appropriate studies performed to date have not demonstrated geriatric-specific problems that would limit the usefulness of Enhertu® in the elderly. However, elderly patients are more likely to have unwanted side effects which may require caution in patients receiving this medicine.

Breast Feeding

There are no adequate studies in women for determining infant risk when using this medication during breastfeeding. Weigh the potential benefits against the potential risks before taking this medication while breastfeeding.

Interactions with Medicines

Although certain medicines should not be used together at all, in other cases two different medicines may be used together even if an interaction might occur. In these cases, your doctor may want to change the dose, or other precautions may be necessary. Tell your healthcare professional if you are taking any other prescription or nonprescription (over-the-counter [OTC]) medicine.

Interactions with Food/Tobacco/Alcohol

Certain medicines should not be used at or around the time of eating food or eating certain types of food since interactions may occur. Using alcohol or tobacco with certain medicines may also cause interactions to occur. Discuss with your healthcare professional the use of your medicine with food, alcohol, or tobacco.

Relate drugs

How to use Fam-trastuzumab deruxtecan-nxki

Medicines used to treat cancer are very strong and can have many side effects. Before receiving this medicine, make sure you understand all the risks and benefits. It is important for you to work closely with your doctor during your treatment.

A doctor or other trained health professional will give you this medicine in a medical facility. It is given through a needle placed into one of your veins. The medicine must be given slowly, so the needle will have to stay in place for at least 30 to 90 minutes. The injection is usually given once every 3 weeks.

You may also receive other medicines to help prevent nausea and vomiting.

Warnings

It is very important that your doctor check your progress closely while receiving the medicine and at regular visits. This will allow your doctor to see if the medicine is working properly and to decide if you should continue to receive it. Blood tests may be needed to check for unwanted effects.

Receiving this medicine while you are pregnant can harm your unborn baby. It may also cause birth defects if the father is receiving it when his sexual partner becomes pregnant. If you are a woman who can get pregnant, your doctor may do tests to make sure you are not pregnant before starting treatment. Female patients should use effective birth control during treatment with this medicine and for 7 months after the last dose. Male patients who have female partners should use effective birth control during treatment with this medicine and for 4 months after the last dose. If you think you have become pregnant while receiving the medicine, tell your doctor right away.

Talk with your doctor before receiving this medicine if you plan to have children. Some men who receive this medicine have become infertile (unable to have children).

Tell your doctor right away if you are having chest pain or tightness, chills, cough, fever, general feeling or discomfort or illness, thickening of bronchial secretions, or trouble breathing while receiving this medicine. These could be symptoms of a serious lung problem (eg, interstitial lung disease or pneumonitis).

This medicine can temporarily lower the number of white blood cells in your blood, increasing the chance of getting an infection. It can also lower the number of platelets, which are necessary for proper blood clotting. If this occurs, there are certain precautions you can take, especially when your blood count is low, to reduce the risk of infection or bleeding:

If you can, avoid people with infections. Check with your doctor immediately if you think you are getting an infection or if you get a fever or chills, cough or hoarseness, lower back or side pain, or painful or difficult urination.

Check with your doctor immediately if you notice any unusual bleeding or bruising, black, tarry stools, blood in the urine or stools, or pinpoint red spots on your skin.

Be careful when using a regular toothbrush, dental floss, or toothpick. Your medical doctor, dentist, or nurse may recommend other ways to clean your teeth and gums. Check with your medical doctor before having any dental work done.

Do not touch your eyes or the inside of your nose unless you have just washed your hands and have not touched anything else in the meantime.

Be careful not to cut yourself when you are using sharp objects such as a safety razor or fingernail or toenail cutters.

Avoid contact sports or other situations where bruising or injury could occur.

This medicine may cause heart failure. Your doctor may test your heart before and during treatment. Contact your doctor right away if you have chest pain, increased coughing, trouble breathing, rapid weight gain, or swelling in your ankles or legs. These could be symptoms of heart failure.

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