Sorafenib (Nexavar®)
Pronounce: soe-RAF-e-nib
Classification: Multikinase Inhibitor
About Sorafenib (Nexavar®)
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.
This medication actually works by targeting two specific receptors, RAF kinase and VEGF receptors. Blocking the RAF kinase slows down cell division and tumor growth. VEGF receptors are responsible for angiogenesis, or the development of new blood vessels by and for the tumor, so blocking these receptors essentially attacks the tumor's source of nutrients.
How to Take Sorafenib
Sorafenib comes as a tablet to take by mouth. It is usually taken twice a day and should be taken on an empty stomach, 1 hour before or 2 hours after eating. Take it at around the same time every day. If you miss a dose, skip the missed dose and take the next dose at the scheduled time. Do not try to catch up or double the next dose.
It is important to take the correct amount of medication. Before each dose, check that the medication and the amount match what your provider prescribed.
The blood levels of this medication can be affected by certain foods and medications, so they should be avoided. These include: warfarin, carbamazepine, rifampin, phenytoin, St. John's wort, and phenobarbital. Be sure to tell your provider about all medications and supplements you take.
Storage and Handling
Store your medication in the original, labeled container at room temperature and in a dry location (unless otherwise directed by your healthcare provider or pharmacist). This medication should not be stored in a pillbox. Keep containers out of reach of children and pets.
If a caregiver prepares your dose for you, they should consider wearing gloves or pouring 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.
High Blood Pressure
This medication can cause high blood pressure (hypertension). You should have your blood pressure checked often during therapy, so that if you have high blood pressure, it can be treated. If your blood pressure cannot be controlled, your provider may want you to stop taking the medication. Tell your providers about any headaches, vision changes, or dizziness.
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.
Diarrhea
Diarrhea is when you pass three or more stools in a day. Your providers can suggest medications to relieve diarrhea. Do not take any medications to manage your diarrhea without talking to your provider first, as your stool may need to be tested. To manage it, try eating foods that are low in fiber and bland, like white rice and boiled or baked chicken. Try not to eat raw fruits, vegetables, whole grain breads, cereals, and seeds. Soluble fiber is a type of fiber found in some foods that helps absorb (soak up) fluid. Foods high in soluble fiber are applesauce, bananas (ripe), canned fruit, oranges, boiled potatoes, white rice, foods made with white flour, oatmeal, cream of rice, cream of wheat, and farina. Stay hydrated by drinking 8 to 10 glasses of non-alcoholic, non-caffeinated fluid each day.
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.
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.
Hand-Foot Syndrome
Hand-foot syndrome (HFS) is a skin reaction on the palms of your hands and/or the soles of your feet. HFS can be caused by certain chemotherapy agents being absorbed (taken in) by your skin cells. HFS can start as a mild tingling, numbness, pins-and-needles feeling, redness, or pain or swelling of your hands and/or feet. It can lead to painful swelling, blistering, or peeling skin, making it hard to do your normal activities. Tell your providers right away if you have these symptoms, as they may need to change your chemotherapy dose or take a break to let your skin heal. Some ways to help prevent HFS are:
- Keep your hands and feet clean and dry.
- Avoid tight shoes or socks.
- Avoid activities that put pressure on your palms or soles during treatment and for 1 week after treatment.
- Use an alcohol-free moisturizer often, and do not use products with perfumes or scents.
- Do not use very hot water for baths and showers
Mouth Ulcers (Mucositis)
This medication can cause sores or soreness in your mouth and/or throat, called mucositis. Tell your providers if your mouth, tongue, inside of your cheek, or throat becomes white, has ulcers, or is painful. Medications can be used to manage pain. Regular mouth care can help prevent or manage mouth sores. Some things you can do are:
- Brush with a soft-bristle toothbrush or cotton swab twice a day.
- Avoid mouthwashes that contain alcohol. A baking soda and/or salt with warm water mouth rinse (2 level teaspoons of baking soda or 1 level teaspoon of salt in an eight-ounce glass of warm water) can be used a few times each day.
- If your mouth gets dry, eat moist foods, drink plenty of fluids (6 to 8 glasses), and suck on sugarless hard candy.
- Avoid smoking and chewing tobacco, and drinking alcoholic beverages and citrus juices.
Nail and Skin Changes
It is important to keep your fingernails and toenails clean and dry. Your fingernails/toenails may become dark, brittle, or fall off. If any nails fall off, clean the nail bed well with soap and water and cover it with a band-aid. Nail polish is safe to use, but do not wear fake nails (gels, acrylics, overlay).
You may notice dry skin or changes in the color or tone of your skin. This medication can make your skin more sensitive to the sun, which can result in a severe sunburn or rash. Sun sensitivity can last even after you are done with chemotherapy. Avoid the sun between 10 am and 4 pm, when it is strongest. Wear sunscreen every day and reapply when you are in the sun. The best sunscreen is SPF 30 or higher and protects against both types of sunlight, UVA and UVB. Wear sunglasses, a hat, and long sleeves/pants to protect your skin, a lip balm with SPF of at least 30, and stay in the shade whenever possible.
Tell your providers if you develop red, painful, or itchy skin, sunburn, skin irritation, bumps, or thick, dry skin.
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 6 months 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 3 months after the last dose of this medication, even if you believe you are not producing sperm. You should not breastfeed during treatment and for 2 weeks after the last dose of this medication.
Important but Less Common Side Effects
Wound Healing
If you have a wound, this medication can affect how it heals. It can make your wound heal very slowly or not heal completely (like a surgical wound not healing or not staying closed). If you are having a procedure or surgery:
- Tell your provider that you have a surgical procedure planned.
- Tell the surgeon that you are taking this medication.
- This medication will likely be stopped before you have any surgery.
- Any surgical incision should be fully healed before starting or restarting this medication.
If you have a surgical wound that has not healed or starts to have signs of infection (redness, swelling, warmth), tell your provider.
Gastrointestinal (GI) Tear
This medication can cause gastrointestinal (GI) perforation, or a tear, in the wall of your intestines. Signs of this can be:
- New or worsening pain in the abdomen (belly).
- New abdominal swelling.
- Chills.
- Fever.
- Constipation.
- Nausea or vomiting.
If you have any of these symptoms, call your provider.
QT Prolongation
QT prolongation is when your heart is not working how it should, and it can cause slow or abnormal heartbeats or an abnormal heart rhythm. Tell your provider right away if you feel abnormal heartbeats or if you feel dizzy or faint.
Bleeding
If you notice you are bleeding more easily or for no reason, especially new bleeding from your gums or nose, call your provider right away. You may also bruise more easily.
If you have bright red or dark, tarry stool, blood in your vomit, vomit that looks like coffee grounds, or have any signs of stroke (severe headache, trouble talking, weakness on one side, confusion), call 911 right away.
This medication can cause bleeding or lab changes if you are also taking warfarin (coumadin). Be sure to tell your provider about all medications and supplements you take.
Blood Clots, Heart Attack, and Stroke
This medication increases your risk for blood clots, stroke, and heart attack. Symptoms may be:
- Swelling, redness, or pain in an arm or leg.
- Chest pain or pressure.
- Pain in your back, neck, or jaw.
- Shortness of breath.
- Numbness or tingling.
Tell your provider right away if you have any of these symptoms.
TSH Levels in Thyroid Cancer Treatment
Patients with thyroid cancer may need to have their TSH levels monitored more frequently while on this medication.
Drug Induced Hepatitis
This medication can cause liver failure, which your oncology care team may monitor for using blood tests called liver function tests. Notify your healthcare provider if you notice yellowing of the skin or eyes, your urine appears dark or brown, or you have pain in your abdomen, as these can be signs of liver toxicity.