Before you begin using a medication, be sure to inform your doctor of any medical conditions or allergies you may have, any medications you are taking, whether you are pregnant or breast-feeding, and any other significant facts about your health. These factors may affect how you should use this medication.
Anemia: Regorafenib may cause low levels of red blood cells. If you experience symptoms of reduced red blood cell count (anemia) such as shortness of breath, feeling unusually tired or pale skin, contact your doctor as soon as possible.
Your doctor will do blood tests regularly to monitor the number of specific types of blood cells, including red blood cells, in your blood.
Bleeding: Regorafenib may cause a reduced number of platelets in the blood, which can make it difficult to stop cuts from bleeding. If you have a medical condition or are taking medication that affect blood clotting, discuss with your doctor how this medication may affect your medical condition, how your medical condition may affect the dosing and effectiveness of this medication, and whether any special monitoring is needed. Your doctor will order routine blood tests to make sure potential problems are caught early.
If you notice any signs of bleeding, such as frequent nosebleeds, or unexplained bruising, notify your doctor as soon as possible. If you notice signs of bleeding in the stomach such as black and tarry stools, vomiting material that looks like coffee grounds or passing blood in the stool, contact your doctor immediately.
Fluid and electrolyte balance: This medication may cause the levels of electrolytes such as potassium, sodium, magnesium, chloride, and calcium in the blood to change while taking this medication. If you experience symptoms of fluid and electrolyte imbalance such as muscle pains or cramps; dry mouth; numb hands, feet, or lips; or racing heartbeat, contact your doctor as soon as possible. Your doctor will do blood tests regularly to monitor the levels of these electrolytes in your blood while you are taking this medication.
Gastrointestinal problems: Rarely, regorafenib can cause perforation of the stomach or intestines. If you experience severe abdominal pain, fever, vomiting, or nausea, contact your doctor immediately.
Hand-Foot Skin Reaction: This medication may cause a tingling, burning sensation on the palms of the hands or soles of the feet. This can progress to swelling or thickening of the skin on the hands and feet. In more severe cases, sores develop, sometimes with blisters or shedding the skin. This reaction is not life-threatening but can be very uncomfortable and treatable. If you notice any early signs of this reaction, contact your doctor as soon as possible.
Heart disease: Changes in heart rhythm (arrhythmia), decreased heart rate, increased blood pressure, and heart attack may occur with the use of this medication. If you have a history of heart problems, discuss with your doctor how this medication may affect your medical condition, how your medical condition may affect the dosing and effectiveness of this medication, and whether any special monitoring is needed.
If you experience signs of a heart attack, such as sudden chest pain or pain radiating to back, down arm, jaw; sensation of fullness of the chest; nausea, vomiting, sweating, or anxiety, get medical help immediately.
Infection: As well as killing cancer cells, regorafenib can reduce the number of cells that fight infection in the body (white blood cells). If possible, avoid contact with people with contagious infections.
Tell your doctor immediately if you notice signs of an infection, such as fever or chills, severe diarrhea, shortness of breath, prolonged dizziness, headache, stiff neck, weight loss, or listlessness. Your doctor will do blood tests regularly to monitor the number of specific types of blood cells in your blood.
Liver function: Regorafenib may reduce liver function and can cause liver failure. If you have liver problems, discuss with your doctor how this medication may affect your medical condition, how your medical condition may affect the dosing and effectiveness of this medication, and whether any special monitoring is needed. Your doctor may want to test your liver function regularly with blood tests while you are taking this medication.
If you experience symptoms of liver problems such as fatigue, feeling unwell, loss of appetite, nausea, yellowing of the skin or whites of the eyes, dark urine, pale stools, abdominal pain or swelling, and itchy skin, contact your doctor immediately.
Reversible Posterior Leukoencephalopathy Syndrome (RPLS): This is a rare disease of the brain that may occur when using medications like regorafenib. If you have had a previous episode of RPLS, regorafenib may not be an appropriate medication for you. Make sure your doctor knows you have experienced this before. If you experience signs and symptoms of RPLS, such as headache, seizures, change in awareness or consciousness or vision changes, contact your doctor immediately.
Skin rash: Regorafenib may cause skin rash or itchiness with or without a rash. Rarely, people taking regorafenib experience a severe skin reaction that can be life-threatening. If you experience a rash that gets worse, or develops into blisters, sores on the lips or eyes or covers a large area of the body, contact your doctor immediately.
Surgery: This medication causes changes to the blood and any slow down the healing process for wounds. Make sure anyone involved in your medical care knows you are taking regorafenib.
Pregnancy: There is no information about the effect of regorafenib on an unborn baby if this medication is used during pregnancy. Women who may become pregnant while taking this medication must use an effective form of birth control, even if they have not had their first menstrual period. Effective birth control must be used by both women and men during treatment with regorafenib, and for at least eight weeks following the discontinuation of treatment. If you become pregnant while taking this medication, contact your doctor immediately.
Breast-feeding: It is not known if regorafenib passes into breast milk. If you are a breast-feeding mother and are taking this medication, it may affect your baby. Talk to your doctor about whether you should continue breast-feeding.
Children: The safety and effectiveness of using this medication have not been established for children.