Pazopanib

Pazopanib is a powerful medication, from the Multi-Tyrosine Kinase Inhibitors class. It blocks several proteins involved in cancer growth and spread, including VEGFR 1, 2, and 3; PDGFRs α and β; c-KIT, and others. By targeting these proteins, it prevents the formation of new blood vessels that tumors need to thrive. Pazopanib competes with ATP (Adenosine triphosphate), a molecule that activates these proteins, to inhibit their signaling pathways, thus preventing tumor cell growth, survival, and migration.

Administration

This oral medication (pill) should be taken once a day on an empty stomach. You should not eat anything for at least 2 hours before and 1 hour after taking Pazopanib.

Potential Side Effects & Management

• Infection Risk: Given treatments’ intensity, reduced white blood cell counts heighten infection risks, necessitating vigilance and timely medical intervention. If you have a fever over 38.3°C, you should advise your medical team or go to the emergency department.
• Bruising and Bleeding: Reduced platelets due to treatment can lead to easy bruising, nosebleeds, or blood in urine/stool. Platelet transfusion might be necessary.
• Nausea, Vomiting and Hair Loss: Managing these side effects can significantly impact quality of life during treatment.
• Stomach Pain: Pain, bloating, indigestion, or discomfort in the abdomen. Your doctor can prescribe medications to alleviate these symptoms.
• Diarrhea: Increased bowel activity.
• Fatigue: This treatment may cause fatigue or weakness, which can impact daily activities.
• Weight Loss: this treatment may cause a reduction in body weight. Check with your healthcare providers what measures can be taken to prevent deficiencies.
• Liver Problems: This treatment can lead to liver injury, characterized by elevated levels of liver enzymes (transaminases) and bilirubin in the blood. Close monitoring of liver function through regular blood tests is essential.
• Loss of Appetite: Treatment can impact appetite and lead to anorexia. Dietary changes may be suggested.
• Rash: Rash symptoms typically start within 2 to 4 weeks of treatment initiation but may also appear later, even after a few months.
• Headache, Muscle or Joint Pain: Pain in head, muscles or joints may arise; notify your doctor for pain relief, especially if persistent.
• Abnormalities in laboratory tests: Electrolyte (essential minerals in the blood) imbalances, changes in glucose levels, and elevated thyroid-stimulating hormone (TSH), may occur as side effects of pazopanib treatment.
• Hypertension: This treatment may cause elevated blood pressure.

When to Seek Medical Attention

If you experience the following symptoms, seek immediate medical attention to assess and manage potential complications.

1. Gastrointestinal Perforation and Fistula: Perforation occurs when there is a hole or tear in the wall of the gastrointestinal tract, allowing its contents to leak into the abdominal cavity. A fistula is an abnormal connection between two organs or between an organ and the skin, which can develop as a result of inflammation, injury, or infection.
– Recognizing Signs: Look out for severe abdominal pain, accompanied by chills, fever, nausea, or vomiting, bloody or dark stools which could indicate gastrointestinal perforation or fistula formation.

2. Blood Clots:
-Blood clots are gel-like clumps of blood that can form inside your blood vessels. They can block blood flow and lead to serious problems like heart attacks and strokes.
– Identifying Symptoms: Pay attention to chest pain or pressure, pain in arms, back, neck, or jaw, shortness of breath, numbness or weakness on one side of the body, trouble talking, sudden severe headache, or sudden vision changes, which may indicate a blood clot.

3. Cardiac Dysfunction:
-Cardiac dysfunction refers to problems with the heart’s ability to pump blood effectively.
– Monitoring for Complications: Pay attention to any symptoms of heart failure, such as shortness of breath or swelling of the ankles and feet.

4. Hemorrhage:
– Hemorrhage refers to severe bleeding, either internally or externally.
– Identifying Manifestations: Be aware of signs of bleeding, such as coughing up blood or finding blood in your stool.

5. Posterior Reversible Encephalopathy Syndrome (PRES):
– Posterior Reversible Encephalopathy Syndrome (PRES) is a rare neurological disorder characterized by symptoms such as headache, seizures, confusion, visual disturbances, and lethargy, often accompanied by high blood pressure.
– Recognizing Symptoms: Be mindful of symptoms like headache, confusion, or visual disturbances, especially if you have high blood pressure.

6. Retinal Detachment:
– Retinal detachment is a serious eye condition where the retina, a layer of tissue at the back of the eye, pulls away from its normal position, leading to vision problems such as blurry or impaired vision.
– Identifying Visual Changes: Report any changes in your vision, such as blurriness or impaired vision.