What is Verzenio?
Verzenio (Abemaciclib) is used to treat adults in all stages of with hormone-receptor-positive (HR+), HER2-, node-positive, early breast cancer that has a high risk of returning.
It is also used in some cases of Metastatic breast cancer (MBC), given with an aromatase inhibitor as initial endocrine-based therapy for males or postmenopausal women.
How does Verzenio work?
Verzenio is used as a combination treatment along with endocrine therapy. Cancer cells grow in an uncontrolled fashion. Verzenio stops cancer cells from metastasizing (dividing and growing) by inhibiting cyclin-dependent kinases. By interfering with kinases, a type of protein in the body that controls cell division, Verzenio can prevent the growth of cancer cells.
It can be used alone or in combination with Faslodex to treat hormone-receptor-positive, HER2-negative, metastatic, or advanced-stage breast cancer. It may also be used in combination with an aromatase inhibitor to treat advanced-stage breast cancer in post-menopausal women who have not previously received hormone therapies.
It may also be used in tandem with tamoxifen to reduce the risk of recurrent, early-stage, hormone-receptor-positive, HER2-negative, node-positive breast cancer that is highly likely to come back.
Dosage
Verzenio is a pill that is taken orally. The starting doses of Verzenio are
- 150 mg twice daily, taken in combination with another endocrine treatment such as Faslodex, tamoxifen, or an aromatase inhibitor
- 200 mg taken twice daily as monotherapy for patients with HR+, HER2-negative advanced or metastatic breast cancer who have progressed after prior endocrine therapy.
To get the most benefit from the drug, take it regularly. Do not increase your dose or use this drug for longer than prescribed. Your condition will not improve faster, and the risk of serious side effects is guaranteed to increase.
Overdose
If someone experiences symptoms, namely fainting or trouble breathing, call emergency services (911) or a poison control center immediately. US resident can call 1-800-222-1222 to reach their local poison control center.
Missed Doses
If you vomit your dose of Verzenio, do not take another. Plan to take your next dose at your regularly scheduled time. Refrain from taking two doses at once.
Side Effects
Like most other breast cancer medicines, Verzenio can cause intense side effects.
One of the most common side effects of Verzenio is diarrhea. For most, this symptom begins during the first week (give or take) of treatment. Your doctor will likely prescribe an antidiarrheal as a preventative measure.
Additional side effects include:
- lowered white blood cell count
- fatigue
- nausea
- abdominal pain
- increased risk of infection
- anemia
- vomiting
- headache
- hair loss
- low platelet counts
In rarer but more serious cases, Verzenio can cause severe side effects, including:
- Liver issues – yellowing of skin or eyes, dark urine, extreme fatigue, loss of appetite, bleeding or bruising more than usual
- Severe Neutropenia (low white blood cell count) – low white blood cell counts are a typical side effect, but in cases of severe neutropenia, one may have to decrease or halt their dosage of Verzenio. Before and during treatment with Verzenio, your doctor will monitor your white blood cell count.
- Blood clots – Verzenio may cause serious or life-threatening clots in your lungs and arteries. If you experience shortness of breath, rapid heart rate, rapid breathing, or a sudden sharp chest pain, tell your doctor immediately.
Since you may take Verzenio in combination with other drugs such as Faslodex, tamoxifen, or an aromatase inhibitor, you may also experience side effects from those medications. Common Faslodex side effects include hot flashes, nausea, and vomiting. Tamoxifen may also cause hot flashes, nausea, and fatigue. Aromatase inhibitors are also known to cause joint stiffness and pain.
Overall, this medicine has been prescribed because your provider has determined that the projected benefits outweigh the negative effects. If any symptoms become bothersome or your health worsens on Verzenio, be sure to notify your provider to see about alternatives or techniques for reducing the severity of side effects.
Tell your doctor immediately if you experience serious side effects, namely: unusual tiredness, bruising or bleeding easily, liver damage (frequent nausea and vomiting, loss of appetite), stomach or abdominal pain, yellowing of the skin or eyes, and dark urine.
Serious allergic reactions to this drug are rare. However, if you notice symptoms of an allergic reaction, such as itchiness, rash, swelling/inflammation, dizziness, or trouble breathing, seek emergency help immediately.
Serious side effects can be reported to the FDA at 1-800-FDA-1088 or fda.gov/medwatch.
Warnings & Precautions
With diarrhea as a side effect, it is important to try to mitigate dehydration. Tell your doctor if you have loose stools so they can prescribe an antidiarrheal. Be sure to drink plenty of fluids to reduce your risk of dehydration.
Temporary hair loss might occur. Your hair should grow back as normal upon finishing treatment with Verzenio.
Before taking this medication, tell your doctor or pharmacist your full medical history, especially if you have a history of liver disease or bleeding/clotting issues.
This drug may lower your ability to fight off pathogens. Your risk of developing a serious or fatal infection is higher on this medication. If you experience signs of infection such as sore throat, fever, chills, or cough, notify your doctor promptly.
This drug can be absorbed through the skin and lungs and may harm an unborn baby. As such, women who are pregnant should not handle the medication, breathe dust from the tablets, or ingest this medication.
Storage & Safety
For safety and best results, store your prescription at its recommended temperature. Keep it away from light and high moisture (e.g. away from your bathroom). Keep all medications out of reach of children and pets.
Do not flush or pour medications down the toilet or drain (unless you are told to do so). If this product is no longer needed or has expired, consult your pharmacist or local waste disposal company on how to properly discard your medication.
Drug Interactions
There are specific medicines, supplements, and foods you should avoid if you are taking Verzenio.
- Consuming grapefruit or grapefruit juice can increase the effects of Verzenio.
- Taking a strong CYP3A inhibitor is not recommended while on Verzenio. This class of medicines includes antifungal medicines such as Nizoral.
- Taking a strong CYP3A inducer may decrease the effects of Verzenio. This class of medicine includes Rifamate, an antibiotic often used for tuberculosis treatment.
Before taking a new medication, be sure to consult with your provider on all other medications you are currently on. This includes supplements and over-the-counter medications, as they might have active ingredients that interact with the drug.
Women who are pregnant or planning to become pregnant should not take Verzenio, as it can be harmful to a developing fetus. Using effective birth control while taking Verzenio is highly recommended for preventing unwanted pregnancy and birth defects.
Women who are breastfeeding or plan to breastfeed should not take Verzenio, as it can cause harm to unborn fetuses.
Consulting with a medical professional can help limit unwanted side effects or drug interactions that may be very risky or even fatal. Be sure to keep a list of all the products you use and share it with your doctor or pharmacist so they can determine the right dosage for you.
Alternative Medications
Ibrance is another form of kinase inhibitor that is used for the treatment of breast cancer. While Verzenio can be used as a monotherapy (on its own), Ibrance is always taken in combination with another drug, usually an aromatase inhibitor or fulvestrant (an estrogen receptor antagonist).
Ibrance is taken every day for a course of 21 days, followed by a 7-day break, where Verzenio is taken twice daily, every day.
Comparative trials between Verzenio and Ibrance are underway as of 2023, and the advantages of treatment with either or both of them are not yet fully understood. Lab trials thus far have shown that there may be benefits of stopping Ibrance temporarily and switching to Verzenio after a treatment break. Scientists are awaiting further results before providing sweeping advice for treatment.
Frequently Asked Questions
Disclaimer
Pharma Giant provides medical information to help you better understand medications and medical conditions.This content is for informational use only and does not replace advice from a licensed medical practitioner. Consult your doctor or pharmacist before starting or changing any medication. All our partners follow strict safety standards set by their country’s health authorities to make sure you receive safe and high-quality medications.
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