Lenvatinib Generic: Side Effects, Warning and More

lenvatinib side effects


Lenvatinib side effects & Side effects of Lenvatinib

Lenvatinib is a powerful drug used to treat many types of advanced cancer, but it can cause various side effects. Understanding these potential side effects can help patients manage them better during careful treatment. Below, we provide a comprehensive overview of common and serious side effects associated with Lenvatinib.


Common Lenvatinib Side Effects:

  1. Hypertension (High Blood Pressure): High blood pressure is one of the most common side effects of lenvatinib. Regular monitoring of blood pressure is essential, and antihypertensive medication may be required to manage this condition.
  2. Fatigue: Many patients experience fatigue, which can affect daily activities and overall quality of life. Adequate rest and a balanced diet can help manage these symptoms.
  3. Diarrhea: Diarrhea is another common side effect, which can lead to dehydration if not managed properly. Staying hydrated and, in some cases, using antidiarrheal medications can help reduce this problem.
  4. Decreased Appetite: Lenvatinib may decrease appetite, leading to weight loss and nutritional deficiencies. Nutritional supplements and frequent meals may be beneficial.
  5. Stomatitis (Mouth Sores): Mouth sores and ulcers may occur, making eating and speaking would be uncomfortable. Ignore spicy or acidic foods. 


Serious Lenvatinib Side Effects:

  1. Proteinuria (Protein in Urine): Lenvatinib can cause proteinuria, which indicates kidney problems. Regular urine tests are needed to monitor kidney function.
  2. Thyroid Dysfunction: Hypothyroidism may occur, and regular thyroid function tests and appropriate management with thyroid medication.
  3. Liver Toxicity: Elevated liver enzymes are a potential side effect, necessitating regular liver function tests to monitor hepatotoxicity.
  4. Cardiovascular Events: Cardiovascular problems, including heart failure and arterial thromboembolic events (such as stroke or heart attack). Patients with heart conditions should be closely monitored.
  5. Gastrointestinal Perforation and Fistula Formation: Lenvatinib can cause serious gastrointestinal problems such as perforation and fistulas.


Managing Side Effects:

  • Regular monitoring: Frequent blood tests and monitoring are crucial for early detection and management of side effects.
  • Medication adjustments: Your healthcare provider may adjust the dose of lenvatinib or prescribe additional medications to manage side effects.
  • Lifestyle changes: Maintaining a healthy diet, staying hydrated, and engaging in light physical activity can help alleviate some side effects.
  • Communication: Open communication with your healthcare team is essential. Report any new or worsening symptoms immediately.


Lenvatinib 4mg Side Effects:

Side effects at the 4mg dose may be similar to the higher dose but less severe. These include mild hypertension, fatigue, diarrhea, and loss of appetite.


Lenvatinib 10mg Side Effects:

Side effects are more pronounced at the 10mg dose, with a higher incidence of severe hypertension, cardiac dysfunction, and kidney impairment.


Overdose of Lenvatinib:-


(1)Symptoms of Lenvatinib Overdose:-

Symptoms of lenvatinib overdose may vary depending on the amount taken and the individual’s health status. Common signs and symptoms include:

  1. Severe hypertension: Extremely high blood pressure that can cause headaches, dizziness, and even hypertensive crisis.
  2. Nausea and vomiting: Overeating can irritate the gastrointestinal system.
  3. Diarrhea: Overdose may increase gastrointestinal side effects.
  4. Fatigue: Severe tiredness or fatigue beyond normal levels.
  5. Cardiac dysfunction: irregular heartbeat, chest pain, or other cardiac problems.
  6. Liver dysfunction: Jaundice, abdominal pain, or other symptoms of liver stress.
  7. Renal impairment: Decreased urine output, swelling of feet or ankles, or signs of kidney strain.


(2)Treatment of Lenvatinib Overdose:

Management of lenvatinib overdose generally involves supportive and symptomatic care. There is no specific antidote for lenvatinib overdose, so treatment focuses on managing the symptoms and complications that arise. Possible treatment strategies include:


  1. Monitoring and Stabilization: Continuous monitoring of vital signs (blood pressure, heart rate, respiratory rate) and stabilization of the patient’s condition.
  2. Blood pressure management: use of antihypertensive drugs in the control of severe hypertension.
  3. Fluid and electrolyte management: Intravenous fluids may be given to manage dehydration and maintain electrolyte balance.
  4. Cardiac monitoring: Close monitoring of cardiac function to detect and manage any arrhythmias or cardiac dysfunction.
  5. Gastrointestinal Support: Medicines to control nausea, vomiting and diarrhea.
  6. Renal and Hepatic Support: Monitor and support kidney and liver function, including dialysis in potentially severe renal impairment.



What to Do if You Miss a Dose of Lenvatinib:


(1)General Guidelines for Missed Dosages:

If you miss a dose of lenvatinib, it is important to take the following steps to ensure that you continue to receive the benefits of the drug while minimizing the risk of adverse effects:

  • Time Matters:
      • If you remember the missed dose within 12 hours of your regular dose, take the missed dose as soon as you remember.
      • If it is more than 12 hours from your scheduled dose, skip the missed dose altogether.
  • Regular schedule:
      • Continue with your usual dosing schedule after a missed dose. Do not take extra capsules to compensate for a missed dose.
  • Continuity:
      • Try to take lenvatinib at the same time each day to help maintain consistent levels of the drug in your bloodstream.
  • Set reminders:
    • Using a daily alarm or reminder can help you remember to take your medication consistently.


(2)What to Do in Specific Scenarios:


 Miss a Morning Dose:-

If you take lenvatinib on the morning of your scheduled schedule and you realize you missed your dose later that day:

  • Within 12 hours: Take the dose as soon as you remember and continue on your regular schedule the next day.
  • After 12 hours: Skip the missed dose and continue with your next scheduled dose the next morning.


Miss an Evening Dose:-

For those who taking lenvatinib in the evening:

  • Within 12 hours: Take the missed dose as soon as you remember.
  • After 12 hours: Skip the missed dose and take the next dose at the regular time.



Lenvatinib is a potent kinase inhibitor used to treat a variety of cancers, including thyroid cancer, renal cell carcinoma, hepatocellular carcinoma, and endometrial cancer. However, its use during pregnancy poses significant risks to both the mother and the developing fetus. This section outlines important considerations, risks, and recommendations for the management of pregnancy in patients treated with lenvatinib.


Recommendations for Women of Childbearing Potential:-


  • Effective contraception: Women of childbearing potential should use reliable contraception during lenvatinib treatment and for at least one month after the final dose. Effective contraceptive methods include hormonal contraceptives (such as the pill, patch, or injection), intrauterine devices (IUDs), and barrier methods (such as condoms and diaphragms).
  • Counseling: Healthcare providers should counsel female patients regarding the importance of using effective contraception and the potential risk of pregnancy during lenvatinib treatment.

Pregnancy Testing:-

  • Baseline Testing: Pregnancy testing should be performed prior to initiation of lenvatinib treatment to ensure that the patient is not pregnant.
  • Periodic tests: Regular pregnancy tests may be recommended during treatment to detect unwanted pregnancies as early as possible.


Warning and Precaution of Lenvatinib:-

Lenvatinib is a powerful drug used to treat many types of cancer. Although it offers significant therapeutic benefits. And it also carries potential risks and side effects that require careful monitoring and adherence to certain precautions.


(1)Cardiovascular Events:-


  • Caution: Lenvatinib may cause high blood pressure.
  • Precautions: Monitor blood pressure regularly during treatment and manage hypertension with antihypertensive therapy as needed.
  • Management: In severe hypertension that cannot be controlled with medication, lenvatinib should be temporarily discontinued and restarted at a lower dose after blood pressure is controlled.

Cardiac Dysfunction:-

  • Caution: Lenvatinib may cause cardiac dysfunction including heart failure and decreased left ventricular ejection fraction (LVEF).
  • Caution: Patients with pre-existing heart conditions should be closely monitored.


  • Caution: Lenvatinib may cause liver damage with severe hepatotoxicity.
  • Precautions: Monitor liver function tests before starting treatment and periodically during treatment.
  • Management: Dose reduction, temporary interruption, or discontinuation of lenvatinib in patients with elevated liver enzymes or clinical signs of liver dysfunction.


(3)Renal Impairment:-
  • Caution: Lenvatinib may cause renal impairment or worsen pre-existing renal conditions.
  • Caution: Monitor renal function regularly, especially in patients with pre-existing renal disease or receiving nephrotoxic drugs.
  • Management: Adjust dose or discontinue lenvatinib if significant renal impairment occurs.



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