Why is this medication prescribed?
Dabrafenib is used to treat a certain type of melanoma (a type of skin cancer) that cannot be treated with surgery or that has spread to other parts of the body. Dabrafenib is in a class of medications called kinase inhibitors. It works by blocking the action of an abnormal protein that signals cancer cells to multiply. This helps stop the spread of cancer cells.
How should this medicine be used?
Dabrafenib comes as a capsule to take by mouth. It is usually taken twice a day on an empty stomach, 1 hour before or 2 hours after a meal. Take dabrafenib about 12 hours apart at around the same times every day. Follow the directions on your prescription label carefully, and ask your doctor or pharmacist to explain any part you do not understand. Take dabrafenib exactly as directed. Do not take more or less of it or take it more often than prescribed by your doctor. Do not stop taking dabrafenib without talking to your doctor.
Swallow the capsules whole; do not split, chew, or crush them.
Your doctor may adjust your dose of dabrafenib depending on your response to treatment and any side effects that you experience. Talk to your doctor about how you are feeling during your treatment.
Your doctor or pharmacist will give you the manufacturer's patient information sheet (Medication Guide) when you begin treatment with dabrafenib and each time you refill your prescription. Read the information carefully and ask your doctor or pharmacist if you have any questions. You can also visit the Food and Drug Administration (FDA) website (http://www.fda.gov/Drugs/DrugSafety/ucm085729.htm) or the manufacturer's website to obtain the Medication Guide.
Other uses for this medicine
This medication may be prescribed for other uses; ask your doctor or pharmacist for more information.
What special precautions should I follow?
Before taking dabrafenib,
- tell your doctor and pharmacist if you are allergic to dabrafenib, any other medications, or any of the ingredients in dabrafenib capsules. Ask your pharmacist or check the Medication Guide for a list of the ingredients.
- tell your doctor and pharmacist what other prescription and nonprescription medications, vitamins, and nutritional supplements you are taking or plan to take. Be sure to mention any of the following: antacids, such as aluminum hydroxide/magnesium hydroxide (Maalox), calcium carbonate (Tums) or calcium carbonate and magnesium (Rolaids); certain medications for seizures such as carbamazepine (Carbatrol, Epitol, Tegretol), phenobarbital (Luminal), and phenytoin (Dilantin, Phenytek); clarithromycin (Biaxin, in PrevPac); dexamethasone (Decadron); gemfibrozil (Lopid); ketoconazole (Nizoral); medications to reduce stomach acid, such as cimetidine (Tagamet), esomeprazole (Nexium), famotidine (Pepcid), omeprazole (Prilosec, Prilosec OTC, Zegerid), pantoprazole (Protonix), and ranitidine (Zantac); midazolam (Versed); nefazodone; nefazodone; rifampin (Rifadin, in Rifamate, in Rifater, Rimactane); and warfarin (Coumadin, Jantoven. Your doctor may need to change the doses of your medications or monitor you carefully for side effects. Many other medications may also interact with dabrafenib, so be sure to tell your doctor about all the medications you are taking, even those that do not appear on this list.
- tell your doctor what herbal products you are taking, especially St. John's wort.
- tell your doctor if you have or have ever had diabetes, glucose-6-phosphate dehydrogenase (G6PD) deficiency (a genetic condition), liver or kidney disease, or any other medical condition.
- you should know that dabrafenib may temporarily or permanently stop sperm production and may cause infertility in men; however, you should not assume that you cannot get someone else pregnant. Tell your doctor if you are pregnant or plan to become pregnant, or if you plan to father a child. You or your partner should not become pregnant while you are taking dabrafenib. If you or your partner becomes pregnant while taking dabrafenib, call your doctor. Dabrafenib may harm the fetus.
- you should know that dabrafenib may decrease the effectiveness of hormonal contraceptives (birth control pills, patches, rings, implants, and injections). You should use another method of birth control to prevent pregnancy in yourself or your partner during your treatment with dabrafenib and for at least 1 month afterwards. Talk to your doctor about birth control methods that will work for you.
- tell your doctor if you are breast-feeding or plan to breast-feed. You should not breast-feed while taking dabrafenib.
- if you are having surgery, including dental surgery, tell the doctor or dentist that you are taking dabrafenib.
What special dietary instructions should I follow?
Unless your doctor tells you otherwise, continue your normal diet.
What should I do if I forget a dose?
Take the missed dose as soon as you remember it. However, if it is less than 6 hours until your next scheduled dose, skip the missed dose and continue your regular dosing schedule. Do not take a double dose to make up for a missed one.
What side effects can this medication cause?
Dabrafenib may cause side effects. Tell your doctor if any of these symptoms are severe or do not go away:
- joint, muscle, or back pain
- cough, runny nose, or sore throat
- hair loss
Some side effects can be serious. If you experience any of these symptoms call your doctor immediately:
- changes in skin such as a new wart, skin sore, or red bump that bleeds or does not heal
- change in size or color of a mole
- decreased urination
- swelling of hands, feet, ankles, or lower legs
- frequent urination
- increased thirst
- breath that smells like fruit
- eye pain
- red or swollen eyelids
- sensitivity to light
- blurred vision or vision changes
- swelling, pain, redness, or peeling of skin on the palms and soles of the feet
- ongoing pain that begins in the stomach area, but may spread to the back
Dabrafenib may increase the risk that you will develop new skin cancers. Talk to your doctor about the risks of taking this medication.
Dabrafenib may cause other side effects. Call your doctor if you have any unusual problems while taking this medication.
If you experience a serious side effect, you or your doctor may send a report to the Food and Drug Administration's (FDA) MedWatch Adverse Event Reporting program online (http://www.fda.gov/Safety/MedWatch) or by phone (1-800-332-1088).
What should I know about storage and disposal of this medication?
Keep this medication in the container it came in, tightly closed, and out of reach of children. Store it at room temperature and away from excess heat and moisture (not in the bathroom). Throw away any medication that is outdated or no longer needed. Talk to your pharmacist about the proper disposal of your medication.
In case of emergency/overdose
In case of overdose, call your local poison control center at 1-800-222-1222. If the victim has collapsed or is not breathing, call local emergency services at 911.
What other information should I know?
Keep all appointments with your doctor and the laboratory. Your doctor will order certain lab tests before and during your treatment to check your body's response to dabrafenib. Your doctor will check your skin for any changes before, every 2 months during your treatment, and for up to 6 months after treatment.
Do not let anyone else take your medication. Ask your pharmacist any questions you have about refilling your prescription.
It is important for you to keep a written list of all of the prescription and nonprescription (over-the-counter) medicines you are taking, as well as any products such as vitamins, minerals, or other dietary supplements. You should bring this list with you each time you visit a doctor or if you are admitted to a hospital. It is also important information to carry with you in case of emergencies.