Ribociclib 200mg Film-Coated Tablets — CDK4/6 Inhibitor for HR-Positive HER2-Negative Advanced and Metastatic Breast Cancer With Proven Overall Survival Benefit Across Pre/Perimenopausal and Postmenopausal Women
Kryxana® (Ribociclib) — CDK4/6 Inhibitor With the Most Comprehensive Overall Survival Evidence in HR-Positive Breast Cancer
The Only CDK4/6 Inhibitor With Proven OS Benefit in Premenopausal Women — Three Phase 3 Trials Demonstrating Significant Survival Improvement
Kryxana® (Ribociclib) is a selective cyclin-dependent kinase 4 and 6 (CDK4/6) inhibitor used in combination with endocrine therapy for hormone receptor-positive (HR+) HER2-negative locally advanced or metastatic breast cancer — in pre/perimenopausal and postmenopausal women. Ribociclib inhibits CDK4 and CDK6 — preventing phosphorylation of the retinoblastoma protein (Rb) and blocking cell cycle progression from G1 to S phase — arresting HR-positive breast cancer cell proliferation.
Kryxana is distinguished from the other CDK4/6 inhibitors by the most comprehensive overall survival evidence in the class. Three landmark Phase 3 trials — MONALEESA-2, MONALEESA-3, and MONALEESA-7 — all demonstrate significant OS benefit with Ribociclib across different patient populations:
This breadth of OS evidence across both pre/perimenopausal and postmenopausal women — and across first and second-line treatment — makes Kryxana the CDK4/6 inhibitor with the strongest and most comprehensive overall survival data in HR-positive metastatic breast cancer.
A.K. Pharma is a trusted medicine distributor in Delhi supplying genuine Kryxana (Ribociclib) to hospitals, oncology centres, breast cancer clinics, and pharmacies across India. Manufactured by Novartis, Kryxana is an essential medicine in modern breast cancer oncology — changing the treatment paradigm for HR-positive metastatic breast cancer globally.
What is Kryxana (Ribociclib)?
Kryxana contains Ribociclib — a selective, small molecule CDK4/6 inhibitor that competitively binds to the ATP-binding site of CDK4 and CDK6 kinases — blocking their catalytic activity and preventing downstream Rb phosphorylation and cell cycle progression.
The CDK4/6-Rb-E2F Axis — Central Driver of HR-Positive Breast Cancer Proliferation:
In normal cells, cell cycle progression from G1 to S phase is tightly regulated by:
In HR-positive breast cancer:
Ribociclib’s Mechanism: Ribociclib competitively inhibits ATP binding to CDK4 and CDK6 — without ATP, CDK4/6 cannot phosphorylate Rb. Hypophosphorylated Rb remains bound to E2F → E2F target genes are not transcribed → G1 cell cycle arrest → HR-positive breast cancer cell proliferation is blocked.
Synergy With Endocrine Therapy: Ribociclib and endocrine therapies (aromatase inhibitors, Fulvestrant) act synergistically — endocrine therapy reduces cyclin D1 expression (less CDK4/6 substrate) while Ribociclib directly inhibits CDK4/6. Dual targeting of both upstream (via reduced cyclin D1) and downstream (via direct CDK4/6 inhibition) components of the same pathway provides more complete cell cycle blockade — translating to significantly longer PFS and OS than endocrine therapy alone.
Full prescribing information is available at the FDA label for Ribociclib.
Clinical Studies and Evidence
MONALEESA-2 Trial (Ribociclib + Letrozole — First-Line Postmenopausal) Published in the New England Journal of Medicine (2016) with updated OS analysis published in Annals of Oncology (2021), MONALEESA-2 was a Phase 3 randomised controlled trial of 668 postmenopausal women with HR-positive HER2-negative locally advanced or metastatic breast cancer who had not received prior systemic therapy for metastatic disease — comparing Ribociclib + Letrozole vs placebo + Letrozole. Key results at final OS analysis:
MONALEESA-7 Trial (Ribociclib + Endocrine Therapy — Premenopausal Women) Published in the New England Journal of Medicine (2018) for PFS data and Annals of Oncology (2023) for updated OS data, MONALEESA-7 was a Phase 3 randomised controlled trial of 672 pre/perimenopausal women with HR-positive HER2-negative advanced breast cancer — comparing Ribociclib + endocrine therapy (Tamoxifen or NSAI + Goserelin) vs placebo + endocrine therapy. Key results at final OS analysis:
MONALEESA-3 Trial (Ribociclib + Fulvestrant — First and Second-Line Postmenopausal) Published in the New England Journal of Medicine (2018) with final OS analysis published in New England Journal of Medicine (2021), MONALEESA-3 enrolled 726 postmenopausal women with HR-positive HER2-negative advanced breast cancer — both first-line and second-line (after prior endocrine therapy) — comparing Ribociclib + Fulvestrant (Faslodex) vs placebo + Fulvestrant. Key results at final OS analysis:
MONALEESA-2 — Early Stage Breast Cancer Signal (Emerging Data) Emerging data from ongoing adjuvant trials investigating Ribociclib in early breast cancer are being monitored — though unlike Ramiven (Abemaciclib) which has approved adjuvant indication (monarchE), Ribociclib does not currently have an approved adjuvant indication.
Available Strengths
Kryxana is available as:
| Presentation | Dose | Pack Size |
|---|---|---|
| Kryxana 200mg Film-Coated Tablets | 200mg per tablet | 63 tablets per pack (3-week supply per cycle) |
Standard dose: 600mg (three 200mg tablets) orally once daily for 21 days followed by 7 days off — repeating in 28-day cycles.
The 63-tablet pack provides exactly one cycle of treatment (21 days × 3 tablets = 63 tablets) — simplifying dispensing and supply management.
Indications — What Kryxana is Used For
HR-Positive HER2-Negative Advanced or Metastatic Breast Cancer — Postmenopausal Women:
HR-Positive HER2-Negative Advanced or Metastatic Breast Cancer — Pre/Perimenopausal Women:
For detailed indication information refer to MedlinePlus Ribociclib.
Key Benefits of Kryxana
Most Comprehensive OS Evidence Among CDK4/6 Inhibitors Kryxana is the only CDK4/6 inhibitor to demonstrate significant overall survival benefit in three separate Phase 3 trials — MONALEESA-2, MONALEESA-3, and MONALEESA-7 — across first and second-line settings, and across both postmenopausal and premenopausal women. No other CDK4/6 inhibitor has demonstrated OS benefit across this breadth of patient populations and treatment settings.
Unique OS Benefit in Premenopausal Women MONALEESA-7 is the only clinical trial in any CDK4/6 inhibitor programme to demonstrate significant OS benefit specifically in premenopausal women with HR-positive metastatic breast cancer. This is a critically important finding — premenopausal HR-positive metastatic breast cancer affects younger women who stand to benefit most from proven life extension. Kryxana is the preferred CDK4/6 inhibitor in premenopausal HR-positive metastatic breast cancer based on this unique OS evidence.
Longest Median OS in Second-Line HR-Positive MBC The MONALEESA-3 final OS analysis demonstrates a median OS of 53.7 months with Ribociclib + Fulvestrant — one of the longest median OS values ever demonstrated in a Phase 3 trial for HR-positive metastatic breast cancer in any treatment line. This remarkable survival outcome reflects the transformative impact of optimal CDK4/6 inhibitor + endocrine therapy on long-term prognosis.
Flexible Combination Partners — AI or Fulvestrant Kryxana can be combined with aromatase inhibitors (MONALEESA-2) or Fulvestrant (MONALEESA-3) — both available from A.K. Pharma — providing flexibility across first and second-line settings and different endocrine resistance profiles. This versatility ensures Kryxana can be used throughout the metastatic treatment continuum.
Comprehensive Premenopausal Coverage With OFS MONALEESA-7 specifically studied Ribociclib with both Tamoxifen + OFS and NSAI + OFS — providing evidence for Kryxana across both endocrine combination options in premenopausal women. This comprehensiveness makes Kryxana applicable in premenopausal patients regardless of which endocrine partner is chosen.
3-Weeks-On/1-Week-Off Schedule — Structured Treatment Cycles The 21-day on / 7-day off dosing schedule provides a structured weekly break allowing haematological toxicity recovery between cycles — particularly the neutropenia that is the primary dose-limiting toxicity of CDK4/6 inhibitors. The predictable cycle structure simplifies monitoring and patient management.
Convenient 63-Tablet Pack — One Pack Per Cycle The 63-tablet pack contains exactly one 28-day cycle of treatment — simplifying dispensing, adherence tracking, and supply management for patients, pharmacies, and hospital formularies.
How Kryxana Works — CDK4/6 Inhibition in HR-Positive Breast Cancer
Normal Cell Cycle Regulation:
The cell cycle is tightly regulated by cyclins and cyclin-dependent kinases (CDKs). The G1 to S phase transition — the commitment point for cell division — is controlled by:
Dysregulation in HR-Positive Breast Cancer:
In HR-positive breast cancer, the CDK4/6-Rb-E2F axis is hyperactivated through:
Ribociclib’s Mechanism:
Step 1 — Competitive ATP Binding Inhibition: Ribociclib binds competitively to the ATP-binding pocket of CDK4 and CDK6 — preventing ATP from binding. Without ATP, the CDK4/6 kinase cannot phosphorylate substrate proteins.
Step 2 — Rb Hypophosphorylation: Without CDK4/6 activity, Rb remains in its hypophosphorylated (active) state — bound to E2F transcription factors — sequestering them and preventing E2F-driven transcription.
Step 3 — G1 Cell Cycle Arrest: Without E2F activation, S-phase genes are not transcribed → cells cannot progress from G1 to S phase → G1 cell cycle arrest. HR-positive breast cancer cells arrest in G1 — accumulating in a growth-arrested state.
Step 4 — Cellular Senescence: Prolonged G1 arrest with CDK4/6 inhibition leads to cellular senescence — a stable, irreversible growth arrest state — in a significant proportion of cells. Senescent cells upregulate the SASP (Senescence-Associated Secretory Phenotype) which may have immunogenic and anti-tumour effects — contributing to durable responses beyond simple cytostasis.
Synergistic Mechanism With Endocrine Therapy:
Endocrine therapies reduce cyclin D1 expression by suppressing ER-driven CCND1 transcription → less cyclin D1 available → less CDK4/6 activation. Ribociclib simultaneously blocks the CDK4/6 that is present from phosphorylating Rb. The combination creates:
For detailed mechanism overview refer to ESMO Breast Cancer Guidelines and ASCO Breast Cancer Guidelines.
Kryxana vs Palbace vs Ramiven — CDK4/6 Inhibitor Comparison
| Feature | Kryxana (Ribociclib) | Palbace (Palbociclib) | Ramiven (Abemaciclib) |
|---|---|---|---|
| Dosing | 600mg once daily 3 weeks on / 1 week off | 125mg once daily 3 weeks on / 1 week off | 150mg twice daily — continuous |
| OS benefit — postmenopausal | ✅ Yes (MONALEESA-2, -3) | Not demonstrated | ✅ Yes (MONARCH 2, 3) |
| OS benefit — premenopausal | ✅ Yes (MONALEESA-7) — unique | Not demonstrated | Not specifically demonstrated |
| OS benefit — trials | 3 trials with OS benefit | 0 trials with OS benefit | 2 trials with OS benefit |
| Monotherapy approval | ❌ No | ❌ No | ✅ Yes |
| Adjuvant early BC approval | ❌ No | ❌ No | ✅ Yes (monarchE) |
| Grade 3-4 neutropenia | ~60% | ~66% | ~26% |
| Diarrhoea (any grade) | ~35% | ~26% | ~85% |
| QTc prolongation | ✅ Monitoring required | ❌ Minimal | ❌ Minimal |
| Manufacturer | Novartis | Pfizer | Eli Lilly |
| Available at A.K. Pharma | Request Quote | Request Quote | Request Quote |
Dosage and Administration
Standard Dose:
Important — Take With or Without Food Consistently: Food has a modest effect on Ribociclib absorption — taking consistently with food or consistently without food avoids day-to-day variability. Avoid grapefruit and grapefruit juice — CYP3A4 inhibition increases Ribociclib levels significantly.
Administration:
When Used With Endocrine Therapy Partners:
Dose Reduction Schedule:
Monitoring Schedule:
| Parameter | Frequency |
|---|---|
| CBC (neutrophils, platelets, haemoglobin) | Baseline, Day 14 cycle 1, Day 1 cycles 2-6, then every other cycle |
| ECG (QTc interval) | Baseline, Day 14 cycle 1, Day 1 cycle 2, then as clinically indicated |
| LFTs | Baseline, every 2 cycles for first 6 cycles, then every 4 cycles |
| Electrolytes (K+, Mg²+, Ca²+) | Correct before starting; monitor throughout |
Full dosing guidelines available at Drugs.com Ribociclib Dosage.
QTc Monitoring — Important Safety Requirement Unique to Ribociclib
Ribociclib prolongs the QTc interval — a unique safety consideration among CDK4/6 inhibitors. QTc prolongation requires careful management:
Before Starting Kryxana:
During Treatment:
QTc Management:
Drugs to Avoid With Ribociclib:
This QTc monitoring requirement is the primary safety distinction between Kryxana and the other CDK4/6 inhibitors — Palbociclib and Abemaciclib do not have significant QTc effects.
Who Should Use Kryxana
Kryxana is prescribed for:
Postmenopausal women:
Pre/Perimenopausal women:
Patients where QTc monitoring is feasible:
Kryxana is prescribed by medical oncologists and breast cancer specialists. A.K. Pharma supplies Kryxana to hospitals, oncology centres, breast cancer clinics, and pharmacies across Delhi and India.
Possible Side Effects
Common side effects include neutropenia (74% — most common dose-limiting toxicity), nausea (52%), fatigue (37%), diarrhoea (35%), leukopenia (33%), alopecia (33%), vomiting (29%), constipation (25%), headache (22%), and back pain (20%).
Serious side effects include:
Neutropenia: Grade 3-4 neutropenia in approximately 60% of patients — the most important haematological toxicity. CBC monitoring per schedule is mandatory. Dose delay for Grade ≥3 neutropenia; dose reduce for recurrent Grade ≥3 or febrile neutropenia. Febrile neutropenia is uncommon (approximately 1.5%) despite high rates of Grade 3-4 neutropenia — patients tolerate the neutropenia well in most cases.
QTc Prolongation: Grade 3 QTc prolongation (>500ms) in approximately 3.3% of patients. Mandatory ECG monitoring schedule — see QTc monitoring section above. Permanently discontinue for QTc >500ms.
Hepatotoxicity: Grade 3-4 ALT/AST elevation in approximately 10% — LFT monitoring required every 2 cycles for first 6 cycles.
Interstitial Lung Disease/Pneumonitis: Rare but reported — monitor for new respiratory symptoms; withhold and evaluate if suspected.
Embryo-Foetal Toxicity: Ribociclib can cause foetal harm. Effective contraception required during treatment and for 3 weeks after last dose. Pregnancy test before starting in women of reproductive potential.
Full side effect information available at FDA Ribociclib Safety Information.
Precautions
Storage and Handling
As a responsible medicine distributor in Delhi, A.K. Pharma stores all medicines including Kryxana under manufacturer-recommended conditions ensuring product integrity for every supply to oncology centres and breast cancer clinics.
Manufacturer Information
Kryxana (Ribociclib) is manufactured by Novartis AG, a global pharmaceutical company with a major oncology portfolio. Ribociclib received FDA approval in March 2017 for HR-positive HER2-negative advanced breast cancer with an aromatase inhibitor — with subsequent approvals for the Fulvestrant combination (2018), premenopausal indication (2018), and updated OS-based labelling. A.K. Pharma supplies only genuine Kryxana sourced from authorized Novartis distributors.
Related Breast Cancer Medicines Available at A.K. Pharma
Frequently Asked Questions
Q. What is Kryxana used for? Kryxana (Ribociclib) is used in combination with endocrine therapy for HR-positive HER2-negative locally advanced or metastatic breast cancer in pre/perimenopausal and postmenopausal women — in combination with aromatase inhibitors or Fulvestrant. More information available at MedlinePlus.
Q. What is the generic name of Kryxana? The generic name of Kryxana is Ribociclib. It is a selective CDK4/6 inhibitor manufactured by Novartis — the same active ingredient as the originator Kisqali.
Q. Why is Kryxana preferred in premenopausal women? Kryxana (Ribociclib) is the only CDK4/6 inhibitor to demonstrate significant overall survival benefit specifically in premenopausal women with HR-positive metastatic breast cancer — demonstrated in the MONALEESA-7 trial. No other CDK4/6 inhibitor has proven OS benefit in premenopausal patients. This unique evidence makes Kryxana the preferred CDK4/6 inhibitor for premenopausal HR-positive metastatic breast cancer in current guidelines.
Q. How many Phase 3 trials have shown OS benefit with Kryxana? Three — MONALEESA-2 (postmenopausal + aromatase inhibitor), MONALEESA-3 (postmenopausal + Fulvestrant — both first and second-line), and MONALEESA-7 (premenopausal + endocrine therapy + OFS). No other CDK4/6 inhibitor has OS benefit demonstrated in three separate Phase 3 trials across this breadth of patient populations.
Q. Why is ECG monitoring required with Kryxana but not other CDK4/6 inhibitors? Ribociclib prolongs the QTc interval — a unique pharmacological property among CDK4/6 inhibitors that Palbociclib and Abemaciclib do not share. QTc prolongation can in rare cases lead to potentially fatal ventricular arrhythmias. Mandatory ECG monitoring at baseline, Day 14 Cycle 1, and Day 1 Cycle 2 — along with electrolyte correction before starting — manages this risk safely in clinical practice.
Q. What dose of Kryxana is used and how is it taken? 600mg (three 200mg tablets) orally once daily for 21 days followed by 7 days off — repeating in 28-day cycles. Taken with or without food consistently. Avoid grapefruit. At approximately the same time each day.
Q. Can Kryxana be used with Fulvestrant? Yes — Kryxana + Fulvestrant (MONALEESA-3) is a standard of care for postmenopausal HR-positive HER2-negative advanced breast cancer in both first and second-line settings — with a proven median OS of 53.7 months. Both Kryxana and Faslodex (Fulvestrant) are available from A.K. Pharma.
Q. Is Kryxana available in India? Kryxana can be supplied to hospitals, oncology centres, and pharmacies across India through licensed pharmaceutical distributors. Contact A.K. Pharma — medicine distributor in Delhi — for availability and pricing.
Q. What is the price of Kryxana in India? Kryxana 200mg price in India varies by pack size. Contact A.K. Pharma at 011 4172 6999 or WhatsApp +91 9810034827 for current pricing and bulk supply rates.
Q. How to order Kryxana from A.K. Pharma? You can request a quote directly from this page, call us at 011 4172 6999, or WhatsApp us at +91 9810034827 with your requirements and we will respond promptly.
Q. Does A.K. Pharma supply Kryxana in bulk? Yes. A.K. Pharma supplies Kryxana in bulk to oncology centres, breast cancer clinics, hospitals, and pharmacies across Delhi and India. Contact us for bulk pricing and availability.
Why Order Kryxana from A.K. Pharma?
Contact A.K. Pharma for Kryxana Supply 📍 E-2/257A, 2nd Floor, Shastri Nagar, New Delhi 110052 📞 011 4172 6999 📱 WhatsApp: +91 9810034827 🌐 akpharma.in