This page contains brief details about the drug , it's indication, dosage & administaration, mechanism of action, related brands with strength, warnings and common side effects.

Background and Date of Approval

Abemaciclib is an anticancer medication containing the active ingredient Abemaciclib.  It is a prescription medication that belongs to a class of drugs known as cyclin-dependent kinase (CDK) inhibitors. It is used to treat certain types of cancer, including breast cancer, that has spread to other parts of the body. Cancer is a condition in which cells multiply in an uncontrolled and abnormal manner. This medication works by inhibiting the proteins called cyclin-dependent kinases that play a significant role in the rapid multiplication of cancer cells. This medicine is intended for oral use only and it is given in combination with other hormonal medications
Abemaciclib was developed by Eli Lilly and Company and was first approved by the US Food and Drug Administration (FDA) in 2017 for the treatment of advanced or metastatic breast cancer. Since then, it has been approved for use in other countries and in treating other types of cancer.

Mechanism of Action of undefined

Abemaciclib works by blocking the activity of CDK4 and CDK6 enzymes, which are involved in cell division and growth. By inhibiting these enzymes, it slows down or stops the growth of cancer cells.

Uses of undefined

Abemaciclib is a single-agent treatment for advanced or metastatic breast cancer that has progressed despite other treatments, or in combination with other drugs as a first-line treatment. In combination with other drugs, it is also used in the treatment of advanced or metastatic breast cancer, non-small cell lung cancer, endometrial cancer and pediatric patients with neuroblastoma.

undefined Drug administaration and Dosage available

Abemaciclib is usually taken orally, with or without food. The tablets should be swallowed whole with a glass of water and not crushed, chewed or broken. The dosage and frequency will depend on various factors, including the patient's age, weight, overall health, and the type and stage of cancer being treated. It's important to follow the dosing instructions provided by a healthcare provider, and not to adjust the dosage or frequency without consulting with them first. If a dose is missed, it should be taken as soon as possible unless it's within 6 hours of the next scheduled dose. In that case, the missed dose should be skipped and the regular dosing schedule resumed. It is important not to take a double dose to make up for a missed dose.

Warnings, Precautions and Side Effects of undefined


Abemaciclib comes with several warnings and precautions that patients should be aware of. These include a risk of severe skin reactions, such as Stevens-Johnson syndrome and toxic epidermal necrolysis, which can be life-threatening. Additionally, it can cause heart problems, including heart failure and decreased heart function, and lung problems, including interstitial lung disease and pneumonitis. It can also cause eye problems, including retinal vein occlusion and uveitis, and patients should be monitored for any changes in vision or eye pain. During pregnancy it can cause harmful effect on developing foetus. Breastfeeding while taking it also can cause harmful effect infant.


To ensure the safe use of Abemaciclib, patients should inform their healthcare provider of any medical conditions they have, disclose all medications they are taking, avoid exposure to sunlight and tanning beds, use sunscreen and wear protective clothing when outdoors, and stay hydrated by drinking plenty of fluids. Breastfeeding should be avoided while taking it and for at least 4 months after the final dose. Women of reproductive age should use effective contraception during treatment and for at least 4 months after the final dose. It is important for patients taking it to be aware of these potential risks and report any new or worsening symptoms to their healthcare provider immediately. It is important to follow these precautions to reduce the risk of potential side effects and to ensure that Abemaciclib is effective in treating the intended condition.

Side Effects

Abemaciclib can cause both common and serious side effects. Common side effects include fatigue, diarrhoea, nausea, vomiting, decreased appetite, headache, and infections. Fatigue and diarrhoea are two of the most commonly reported side effects, and they can be severe in some cases. Nausea, vomiting, and decreased appetite can also occur and may require medical management. Headache is another common side effect that can range from mild to severe. It can also suppress the immune system, which can increase the risk of infections. Serious side effects may include blood clots, liver problems, interstitial lung disease, and fetal harm if used during pregnancy. Patients should seek immediate medical attention if they experience symptoms such as chest pain, shortness of breath, yellowing of the skin or eyes, or persistent cough. It is important to note that not all patients will experience these side effects, and some may experience different side effects not listed here. Patients should speak with their healthcare provider regarding any concerns about medication side effects.

Word Of Advice

Suppose you have been prescribed Abemaciclib or any other medication. In that case, it is important to follow the instructions provided by your healthcare provider and to report any side effects or concerns promptly. it can cause serious side effects, so it is important to monitor your symptoms and seek medical attention if you experience any concerning changes in your health. It is also important to avoid alcohol and to follow any safety recommendations provided by your healthcare provider while taking it. Remember to attend all scheduled appointments and follow-up visits with your healthcare provider to ensure your treatment is effective and any side effects are managed appropriately. With proper monitoring and management, Abemaciclib can be an effective treatment option for certain types of cancer.

Frequently Asked Question


  1. Eli Lilly Nederland BV, Electronic medicines compendium (emc), [Revised on May 2022] [ Accessed on 29 March 2023],
  2. Lilly USA, US Food and Drug Administration, [Revised on October 2021] [Accessed on 29 March2023],
  3. DeVita, Hellman, and Rosenberg's Cancer: Principles & Practice of Oncology Authors,11th Edition, 2018, 1006-1022
  4. Bruce A. Chabner, Dan L. Longo, Cancer Chemotherapy and Biotherapy: Principles and Practice, Edition: 6th, 2019, 501-502


The drug information on this page is not a substitute for medical advice. It is meant for educational purposes only. For further details, consult your doctor about your medical condition to know if you can receive this treatment.