Abemaciclib — Uses, Dosage, Side Effects & Safety

Drug class: Cyclin-dependent kinase (CDK) 4/6 inhibitor

Overview

Abemaciclib is a prescription medication used to treat certain types of breast cancer, specifically hormone receptor-positive (HR+), human epidermal growth factor receptor 2-negative (HER2-) advanced or metastatic breast cancer. It is often used in combination with hormone therapies or, in some cases, as a single agent. Abemaciclib works by blocking proteins called cyclin-dependent kinases 4 and 6 (CDK4/6), which are involved in cell division. By inhibiting these proteins, abemaciclib slows down or stops the growth of cancer cells. Key points for patients: Abemaciclib is taken orally, usually twice daily. It is important to take the medication exactly as prescribed and to report any side effects, especially diarrhea or signs of infection, to your healthcare provider promptly.

Therapeutic uses

• Breast cancer
• Other hormone receptor-positive cancers

Common side effects

• Diarrhea
• Neutropenia
• Fatigue
• Nausea
• Abdominal pain
• Venous thromboembolism
• Interstitial lung disease

Frequently Asked Questions about Abemaciclib

What is abemaciclib used for?

Abemaciclib is used to treat HR+/HER2- advanced or metastatic breast cancer, often in combination with hormone therapy.

How should I take abemaciclib?

Take abemaciclib tablets by mouth, usually twice daily, with or without food. Swallow whole and take at the same times each day.

What are the most common side effects?

The most common side effects are diarrhea, nausea, fatigue, decreased appetite, and low white blood cell counts.

Can I take abemaciclib if I am pregnant or breastfeeding?

Abemaciclib is not recommended during pregnancy or breastfeeding due to potential harm to the baby.

What should I do if I miss a dose?

Take the missed dose as soon as you remember unless it is almost time for your next dose. Do not double up doses.

Are there any foods or medicines I should avoid?

Avoid grapefruit products and medicines that strongly affect CYP3A4 enzymes. Always inform your doctor about all other medicines you are taking.

How will my doctor monitor me during treatment?

Your doctor will monitor your blood counts, liver function, and watch for signs of infection or severe diarrhea during treatment.

Educational information only. Always consult a qualified healthcare professional before starting, stopping, or changing any medication.