Bortezomib (Velcade®)
Pronounce: bor-TEZ-oh-mib
Classification: Proteasome Inhibitor
About Bortezomib (Velcade®)
This medication works by inhibiting the 26S proteasome. A proteasome is an enzyme that is responsible for breaking down proteins in all cells (healthy or cancerous). By blocking the action of proteasome, protein builds up in the cells and causes them to die, therefore preventing tumor growth.
How to Take Bortezomib
This medication can be given into a vein (IV, intravenous) or an injection under the skin (subcutaneous). The actual dose is based on your body size and the schedule is dependent on the type of cancer you have.
Certain medications and foods, including green tea, ketoconazole, rifampin, and St. John’s Wort, can interfere with blood levels of this medication. Make sure your provider is aware of all the medications, vitamins, and supplements you are taking.
This medication can cause fatigue, dizziness, passing out, or lower blood pressure when you move from a sitting down to a standing position. Call your provider right away, and do not drive or operate machinery if you have any of these symptoms.
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.
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.
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.
Low White Blood Cell Count (Leukopenia or Neutropenia)
White blood cells (WBC) help your body fight infection. While you are having treatment for cancer, your WBC count can drop, putting you at a higher risk of an infection. Tell your provider right away if you have a fever (temperature greater than 100.4°F or 38°C), sore throat or cold, shortness of breath, cough, burning with urination, or a sore that doesn't heal.
Tips for preventing infection:
- Hand washing: both yours and your visitors is the best way to prevent the spread of infection.
- Avoid large crowds and people who are sick (those who have a cold, fever, or cough, or live with someone with these symptoms).
- When working outside, wear clothes that protect you, like long pants and gloves.
- Do not handle pet waste.
- Keep all cuts and scratches clean.
- Shower or bathe daily.
- Brush your teeth at least twice a day.
- Do not cut cuticles or ingrown nails. You may wear nail polish, but not fake nails.
- Ask your providers before scheduling dental appointments or procedures.
- Ask your providers before you or someone you live with has any vaccines.
Low Red Blood Cell Count (Amemia)
Anemia is when your red blood cell count is lower than normal. Red blood cells carry oxygen to the tissues in your body. When your red cell count is low, you may feel tired or weak. Tell your providers if you have shortness of breath, trouble breathing, or pain in your chest. If your count gets too low, you may receive a blood transfusion.
Low Platelet Count (Thrombocytopenia)
Platelets are blood cells that help your blood clot. Thrombocytopenia is when your platelet count is lower than normal, and you are at a higher risk of bleeding. Tell your providers if you have any bruising or bleeding, including nose bleeds, bleeding gums, or blood in your urine or stool. If your count gets too low, you may receive platelets from a donor.
- Do not use a razor (an electric razor is fine).
- Do not do activities that can cause injury or bleeding.
- Talk to your provider before taking any non-steroidal, anti-inflammatory medications (NSAIDs) like Motrin/Advil (ibuprofen), Aleve (naproxen), Celebrex (celecoxib), and others. These can raise the risk of bleeding.
- Use a soft-bristle toothbrush to brush your teeth. Ask your provider about flossing or using toothpicks.
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.
Peripheral Neuropathy
Peripheral neuropathy is when the nerves not in your brain or spinal cord are damaged. It causes numbness or a tingling feeling in the hands and/or feet, which can also cause pain and trouble with balance. The more you take this medication, the worse your neuropathy can get. The symptoms may slowly get better, or they may never fully go away. Tell your providers if you have symptoms of neuropathy, so that changes can be made to your treatment plan and to manage your symptoms.
Rash
Some people may get a rash, scaly skin, or red, itchy bumps from this medication. Tell your provider if you notice any of these changes in your skin, since it could be a reaction. Your provider may suggest:
- Using an alcohol-free moisturizer on your skin and lips, and do not use moisturizers with perfumes or scents.
- Keep the area clean to avoid infection, especially if it cracks or bleeds.
- Using a topical medication (applied to the skin) if the itching bothers you.
Be sure to talk with your provider about how to care for your skin.
Muscle or Joint Pain/Aches and Headache
Your care team can recommend medications and other strategies to help relieve pain.
Constipation
Constipation is when you have less bowel movements than usual or are having trouble passing stool. To relieve constipation, you can include fiber in your diet (fruits like prunes, apples, peaches, and pear nectars/juices), drink 8 to 10 glasses of non-alcoholic fluids a day, and stay active. Taking a stool softener once or twice a day can prevent constipation. If you do not have a bowel movement for 2 to 3 days, call your provider.
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.
Fertility
This medication may affect your reproductive system, causing changes to your menstrual cycle or sperm. You may have menopausal effects, such as hot flashes and vaginal dryness or be unable to get or keep an erection. Your desire for sex may decrease during treatment. You may want to consider sperm banking or egg harvesting if you might wish to have a child in the future. Talk about your options with your provider before treatment.
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 7 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 4 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 months after the last dose of this medication.
Important but Less Common Side Effects
Virus Reactivation
Cold sores and shingles reactivation have been reported with this medication; your provider may prescribe you a medication to take to prevent those outbreaks from occurring.
Low Blood Pressure (Hypotension)
This medication can cause low blood pressure (hypotension). You may have your blood pressure checked while having treatment. Let your provider know if you have any headaches, vision changes, dizziness, or take blood pressure medication.
Lung Changes
This medication may cause acute respiratory distress syndrome (ARDS) or acute diffuse pulmonary disease, including interstitial pneumonia and lung infiltration. Call your provider if you have shortness of breath, cough, wheezing, or difficulty breathing.
Heart Problems
This medication can cause the development or worsening of, congestive heart failure, decreased left ventricular ejection fraction, and an abnormal heart rhythm called QT prolongation. Call your provider if you develop swelling of the feet or ankles, shortness of breath, feel abnormal heartbeats, or if you feel dizzy or faint.
Posterior Reversible Encephalopathy Syndrome (PRES)
This medication can cause a neurological (brain) disorder called posterior reversible encephalopathy syndrome (PRES or reversible posterior leukoencephalopathy (RPLS). Symptoms of PRES/RPLS are:
- Headache.
- Seizure.
- Lethargy (feeling tired, drowsy, sluggish).
- Confusion.
- Blindness and other vision changes.
- Neurological problems.
Tell your provider about any of these symptoms right away.
Tumor Lysis Syndrome
Tumor Lysis Syndrome (TLS) is a side effect that happens when tumor cells die too quickly, and their waste overwhelms the body. You may be given a medication (allopurinol) and IV fluids to help prevent this. TLS can affect your kidney function. Your provider will monitor your kidney function with blood work. Symptoms may be:
- Nausea.
- Vomiting.
- Diarrhea.
- Lethargy (feeling tired, drowsy, sluggish).
- Little or no urine output.
Tell your provider right away if you have any of these symptoms.
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.
Note to Diabetic Patients
Diabetic patients who take oral hypoglycemic medications should closely monitor their blood sugar and may require adjustment of their diabetic medications.
Damage to Small Blood Vessels
This medication can cause damage to small blood vessels called thrombotic microangiopathy (TMA), which can result in blood clots. Symptoms of TMA include fever, fatigue, bruising, swelling, confusion, vision loss, and seizures. Report any of these symptoms to your provider right away.