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Pabreca, consists of Palbociclib, is an oral medication developed for the treatment of hormone receptor-positive (HR+), human epidermal growth factor receptor 2-negative (HER2-) advanced or metastatic breast cancer. As a selective inhibitor of cyclin-dependent kinases 4 and 6 (CDK4/6), Palbociclib plays a crucial role in controlling cell division, thereby inhibiting the proliferation of cancer cells.
Mechanism of Action
In the G1 phase of the cell cycle, mammalian cells must pass a checkpoint, known as the restriction point "R", in order to complete the cell cycle and divide. CDK4 and CDK6 complex with Cyclin D drive the phosphorylation of the retinoblastoma protein, Rb, which allows the cell to pass R and commit to division. Regulation of one or more proteins involved in this checkpoint is lost in many cancers. However, by inhibiting CDK4/6, Palbociclib ensures that the cyclin D-CDK4/6 complex cannot aid in phosphorylating Rb. This prevents the cell from passing R and exiting G1, and in turn from proceeding through the cell cycle.
Indications and Usage
Palbociclib is approved for use in combination with other therapies for the treatment of HR+, HER2- advanced or metastatic breast cancer:
With an aromatase inhibitor: As initial endocrine-based therapy in postmenopausal women and in men who have not been previously treated with hormone therapy.
With fulvestrant: In adults whose disease has progressed following endocrine therapy.
These combinations have been shown to improve progression-free survival in patients with advanced breast cancer.
Palbociclib represents a significant advancement in the treatment of HR+, HER2- advanced or metastatic breast cancer. By targeting specific proteins involved in cell cycle regulation, it offers a targeted approach to therapy, improving progression-free survival when combined with endocrine treatments. Ongoing research continues to explore its full potential and strategies to overcome resistance mechanisms.
Administration and Dosage
The recommended dosage of Palbociclib involves taking the medication once daily for the first 21 days of a 28-day cycle, followed by a 7-day break. Capsules should be taken with food, while tablets can be taken with or without food. It's important to swallow the capsules and tablets whole without opening, chewing, or crushing them. If vomiting occurs after taking a dose, patients should not take an additional dose but continue with the next scheduled dose. Dose adjustments may be necessary based on individual tolerance and side effects.
Side Effects
Common side effects of Palbociclib include:
Neutropenia (low white blood cell count)
Infections
Fatigue
Nausea
Stomatitis (inflammation of the mouth)
Anemia
Hair thinning or loss
Serious side effects can occur, such as severe neutropenia leading to infections, interstitial lung disease, and liver function abnormalities. Patients should promptly report any signs of infection, breathing difficulties, or unusual bleeding to their healthcare provider.
Drug Interactions and Precautions
Palbociclib is metabolized primarily by the liver enzyme CYP3A. Concomitant use of strong CYP3A inhibitors (e.g., clarithromycin, ketoconazole) or inducers (e.g., rifampin, St. John's wort) can affect Palbociclib levels in the blood. Patients are advised to avoid grapefruit products during treatment, as they can increase drug levels. Regular blood tests are necessary to monitor blood cell counts and liver function during therapy. Women of childbearing potential should use effective contraception during treatment and for at least three weeks after the last dose due to potential harm to a fetus. Men with female partners of reproductive potential should use contraception during treatment and for three months after the final dose.
Similar Drugs
Other CDK4/6 inhibitors approved for HR+, HER2- advanced breast cancer include:
Ribociclib (Kisqali): Approved for use in combination with an aromatase inhibitor.
Abemaciclib (Verzenio): Approved for use as monotherapy or in combination with endocrine therapy.
These agents share a similar mechanism of action but may differ in their side effect profiles and dosing schedules.
Pabreca 125mg Capsule is used to treat the following -
Main Benefits
This is the usual dosage recommended in most common treatment cases. Please remember that every patient and their case is different, so the dosage can be different based on the disease, route of administration, patient's age and medical history.
Find the right dosage based on disease and age
Age Group | Dosage |
Based on research, the following side effects have been observed when Pabreca 125mg Capsule is used -
Common
Is the use of Pabreca 125mg Capsule safe for pregnant women?
Pregnant women may get severe side effects after taking Pabreca. If you are pregnant, do not take Pabreca without a doctor's advice.
Is the use of Pabreca 125mg Capsule safe during breastfeeding?
Pabreca should not be taken without taking your doctor's advice, as it may have severe side effects on breastfeeding women.
What is the effect of Pabreca 125mg Capsule on the Kidneys?
There may be some adverse effects on kidney after taking Pabreca. If you observe any such side effects, stop taking this drug. Consume this medicine again only if your doctor advises you to do so.
What is the effect of Pabreca 125mg Capsule on the Liver?
Pabreca can have moderate side effects on the liver. If you notice any harmful effects then stop taking this drug right away. Consult your doctor before using this medicine again.
What is the effect of Pabreca 125mg Capsule on the Heart?
There may be an adverse effect on the heart after taking Pabreca. If you observe any side effects on your body then stop taking this drug. Restart this medicine only if your doctor advises you to do so.
Is this Pabreca 125mg Capsule habit forming or addictive?
Forming a habit of Pabreca 125mg Capsule has not been reported.
Is it safe to drive or operate heavy machinery when consuming?
You may feel sleepy or tired after taking Pabreca 125mg Capsule. So it is best to avoid driving.
Is it safe?
Yes, Pabreca 125mg Capsule is safe but you must consult your doctor before taking it.
Is it able to treat mental disorders?
No, the use of Pabreca 125mg Capsule in mental disorders is not effective.
Interaction between Food and Pabreca 125mg Capsule
Information is not available on the interaction of any foods with Pabreca 125mg Capsule, due to a lack of research on this.
Interaction between Alcohol and Pabreca 125mg Capsule
Due to lack of research, nothing can be said about side effects of consuming alcohol while taking Pabreca 125mg Capsule.
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