Capmatinib (Tabrecta®)
Pronounce: kap-MA-ti-nib
Classification: Kinase Inhibitor
About Capmatinib (Tabrecta®)
A kinase is an enzyme that helps a cell grow. There are different types of kinases. Each type affects a different phase of cell growth. Kinase inhibitors slow down the growth of cancer cells.
How to Take Capmatinib
This medication comes in a tablet form to be taken by mouth. It can be taken with or without food. The tablet should be taken whole and not crushed, broken, or chewed. If you miss a dose or vomit after taking your dose, do not take another dose. Take your next dose as scheduled. It is important to make sure you are taking the correct amount of medication every time. Before every dose, check that what you are taking matches what you have been prescribed.
The blood levels of this medication can be affected by certain foods and medications, so they should be avoided. These include (but are not limited to): grapefruit, grapefruit juice, carbamazepine, rifampin, ritonavir, and St. John’s wort. Be sure to tell your healthcare provider about all medications and supplements you take.
Storage and Handling
Store your medication in the original container with the label. If you want to use a pillbox, talk to your pharmacist. Keep it in a dry place at room temperature unless your provider or pharmacist tells you otherwise. Keep containers out of reach of children and pets.
If a caregiver prepares your dose for you, they should consider wearing gloves or pour the pills directly from their container into the cap, a small cup, or directly into your hand. They should avoid touching the pills. They should always wash their hands before and after giving you the medication. Pregnant or nursing people should not prepare the dose for you. Ask your provider where to return any unused medication for disposal. Do not flush down the toilet or throw in the trash.
Where Do I Get This Medication?
Some cancer medications are only available through specialty pharmacies. Your provider or pharmacist will start this process. Your insurance plan may also affect where you can get your medication. Call your prescription plan provider to find out which specialty pharmacies are in-network.
Insurance Information
This medication may be covered by your prescription plan. If you qualify, you may be able to get financial help through patient assistance programs (PAP). Co-pay cards may also be available to lower your out-of-pocket cost if you have commercial (not Medicare/Medicaid/Tricare) insurance. Your pharmacist, social worker, or navigator can help find resources for financial support.
Possible Side Effects
These are some of the most common or most serious side effects of this medication. Talk with your provider about the side effects you are having and how they can be managed.
Liver Toxicity
This medication can cause liver toxicity, or liver problems, which your provider may monitor for with blood tests called liver function tests. Symptoms may be:
- Yellowing of your skin or eyes.
- Dark or brown urine.
- Pain in your abdomen (belly).
Tell your provider if you have any of these symptoms.
Peripheral Edema
Peripheral edema is swelling in your hands, arms, legs, ankles, and feet. It is caused by retention (buildup) of fluid. To help get rid of the fluid, you can elevate (lift up) the affected body part and rest it on a pillow. You may need medications to help your body get rid of the extra fluid, and you may be told to follow a low salt diet. Tell your providers if you have any new or worsening swelling.
Nausea and/or Vomiting
Talk to your providers if you have nausea and/or vomiting. They can prescribe medications to help you. Making changes to your diet can also help. Avoid things that make your symptoms worse, like heavy or greasy/fatty foods and spicy or acidic foods, like tomatoes, lemons, and oranges. Try saltines or ginger ale to help your symptoms.
Call your providers if you cannot keep fluids down for more than 12 hours or if you feel lightheaded or dizzy.
Muscle or Joint Pain/Aches and Headache
You may have joint or muscle pain/aches and headaches while taking this medication. Your provider can recommend medications and other ways to help relieve your pain.
Fatigue
Fatigue can cause exhaustion, feeling worn out and that your body is "heavy" and hard to move, or being unable to focus. It is common when you have cancer, and it is not the same as feeling tired. You may need to adjust your schedule to manage fatigue. Plan times to rest during the day and save your energy for more important activities. Exercise can help lessen fatigue. Talk to your providers about ways to deal with this side effect.
Decrease in Appetite or Taste Changes
Nutrition is an important part of your care. Cancer treatment can affect your appetite and make it hard to eat. Ask your provider about nutrition counseling services. Some tips you can follow are:
- Try to eat five or six small meals or snacks during the day, instead of 3 larger meals.
- Nutritional supplements may help if you are not eating enough.
- You may have a metallic taste or find that food has no taste. You may dislike foods or beverages that you liked before cancer treatment. These symptoms can last for months or longer after treatment ends.
- Avoid any food that you think smells or tastes bad. If red meat is a problem, eat chicken, turkey, eggs, dairy products, and fish without a strong smell. Sometimes cold food has less of an odor.
- Add extra flavor to meat or fish by marinating it in sweet juices, sweet and sour sauce, or dressing.
- Use seasonings like basil, oregano, or rosemary to add flavor.
Reproductive Concerns
There is a higher risk of health problems for your baby if you are pregnant, become pregnant, or get someone pregnant while on this medication. To lower the risk of birth defects, you should use birth control (contraception) to avoid pregnancy.
Talk with your provider about what kind of birth control is safest for you and your partner.
If you can become pregnant, you will need to use effective birth control during treatment and for 1 week after the last dose of this medication, even if your menstrual cycle has stopped or changed.
If you can get someone pregnant, you will need to use effective birth control during treatment and for 1 week after the last dose of this medication, even if you believe you are not producing sperm.
You should not breastfeed during treatment and for 1 week after the last dose of this medication.
Important but Less Common Side Effects
Lung Changes
This medication may cause pulmonary fibrosis. This is when your lung tissue gets thicker, causing scarring and stiffening. This is more likely to happen if you had high doses of the medication. Symptoms can be:
- Shortness of breath.
- Cough, wheezing, or trouble breathing.
These problems can happen months to years after treatment ends. Call your provider right away if you have any of these symptoms.
Photosensitivity
Your skin may be more sensitive to the sun, which can lead to severe sunburn or rash. Sun sensitivity can last even after treatment is done. Avoid the sun between 10 to 2pm when it is strongest. Wear sunscreen (at least SPF 30 with UVA/UVB protection) every day and reapply when you are in the sun for extended periods of time). Wear sunglasses with UVA/UVB protection, a hat, and long sleeves/pants to protect your skin. Seek out shade whenever possible.
Pancreas Problems
This medication can affect your pancreas. Call your provider if you have any symptoms of pancreatitis (inflammation of the pancreas), such as:
- Bloating,
- Indigestion.
- Nausea and/or vomiting.
- Fatty stools (that are bulky, pale, oily, and sometimes float).
- Not feeling hungry (loss of appetite).
- Sweating.
- Abdominal (belly) pain or swelling.
- Weight loss.
Your provider may monitor certain blood levels with labs during and after treatment.