Murdo Gordon
Executive Vice President, Global Commercial Operations at Amgen
Thanks, Bob. I'm pleased with our performance in the third quarter, execution is strong across the business with record quarterly sales for seven brands and robust volume growth across our general medicine, inflammation and Hematology-Oncology portfolios. Product sales increased 5% year-over-year. Volume growth was 11% with strength across our regions, US volume growth was 11% and volume growth in our Europe, Latin America, Middle East and Canada region was 8%. Consistent with our international expansion strategy, Asia-Pacific continues to be our fastest growing region with 27% volume growth in the quarter.
Starting with our general medicine business, which includes Repatha, Prolia, EVENITY and Aimovig. Overall revenue for these four products grew 21% year-over-year in the third quarter, driven by 20% volume growth. Repatha sales increased 31% year-over-year in the third quarter, with volume growth of 44%, partially offset by lower net selling price. In the US, volume growth of 45% was driven by a record number of new patients starting treatment, more than doubling year-over-year. We saw a declining net selling prices in the US, primarily driven by new formulary coverage by CVS in July for commercial patients.
Outside the US, we saw 43% volume growth with strength across our regions. There are still many more patients around the world who can benefit from Repatha and we're rising to meet that challenge by investing and executing to drive awareness amongst physicians and patients. In the US, we have significantly expanded our primary care sales force and activated more than 15,000 new prescribers this year. We're also increasing promotion to patients through direct-to-consumer media efforts.
Transitioning to bone health, Prolia sales grew 14% year-over-year in the third quarter, primarily driven by 7% volume growth and higher net selling price. We expect volumes for Prolia to grow supported by real-world evidence data presented earlier this year that demonstrate Prolia's superiority in reducing fracture risk when compared to Alendronate in treatment-naive patients with post-menopausal osteoporosis.
EVENITY had record sales of $307 million for the quarter, driven by 48% volume growth. Osteoporosis disproportionately impacts postmenopausal women in the diagnosis and treatment rates for these patients are low. In 2023, we expect approximately 3 million patients in the US will be treated for post-menopausal osteoporosis. An estimated 40% of treated patients will be at very-high risk of fracture, but only 6% of those high-risk patients will be treated with a bone building product.
EVENITY plays an important role in the bone builder market, with a 58% share in the US and a 44% share in Japan. There's much more work to be done and we'll continue to invest to ensure EVENITY reaches the patients who need it. Otezla sales declined 10% year-over-year, driven by lower net selling price, unfavorable changes to estimated sales deductions and lower inventory levels, partially offset by 1% volume growth in the US.
Otezla net price declines were driven by higher rebates to support and expand access for commercial and Medicare Part-D patients. Our US Otezla business has been impacted by free drug programs associated with new treatment options, that have entered the psoriasis marketplace. We're beginning to see a reduced impact of these free drug programs as physicians and patients are experiencing barriers to access, given prior authorization requirements for these newer therapies.
We have strong conviction in the growth potential of Otezla. With this unique indication for all severities of psoriasis, combined with an established clinical profile, broad payer coverage, a lack of testing required for initiation and convenient oral administration. To realize that potential, we have increased our investment to ensure physician and patients understand both the importance of treating psoriasis systemically and the safety and efficacy profile that Otezla offers.
We're already seeing positive results from that increased investment, including significant growth in the number of patients requesting educational information and taking action on the Otezla website that generally indicate preparation for a discussion with the healthcare professional. We've also recently increased our dermatology sales force by 20% to educate physicians about the benefits of Otezla for appropriate patients. With these increased investments, we expect to drive a return to growth for Otezla.
Enbrel sales decreased 6% year-over-year, primarily driven by an 8% decline from unfavorable changes to estimated sales deductions. Year-over-year volume increased 1% in the third quarter and the number of new patients in the US starting treatment increased by 22%, driven by improved payer coverage and Enbrel's 20 plus year track-record of safety and efficacy.
For the remainder of 2023, we expect our improved coverage will lead to continued growth in new patients and declining net selling price. TEZSPIRE continues to show strong growth with $161 million in sales in the third quarter. Sales increased 21% sequentially, driven by 18% volume growth that benefited from the launch of our self-administered pre-filled single-use pen, which was approved by the US Food and Drug Administration in the first quarter.
We've now obtained coverage of the patent with the majority of pharmacy benefit managers enabling easy access and convenience self-administration for patients in the US, with severe uncontrolled asthma. As we expected, TEZSPIRE's both penetrated and helped grow the US asthma biologics market.
In 2023, the number of new patients on asthma biologics has increased by over 20% year-over-year and TEZSPIRE share of this expanded market is approximately 20%. Sales of TAVNEOS were $37 million in the quarter, with 26% quarter-over quarter volume growth. In the US, approximately 2,300 patients have now been treated with TAVNEOS by over 1,500 healthcare professionals. We continue to see an increase in awareness of TAVNEOS by rheumatologists and nephrologist and exiting the quarter, we saw an increase in new patient start forms.
Looking-forward, we expect to bring TAVNEOS to even more patients with ANCA-associated vasculitis. AMGEVITA sales increased 30% year-over-year for the third quarter, driven by 53% volume growth, partially offset by lower net selling price. Ex-US sales increased 10% driven by 22% volume growth, partially offset by lower net selling price.
Moving to our Hematology-Oncology business, which includes LUMAKRAS, KYPROLIS, XGEVA, Vectibix, Nplate and BLINCYTO. Strong commercial execution and compelling new clinical data drove 15% volume growth year-over-year for these six innovative products. BLINCYTO sales grew 55% year-over-year to a record $220 million for the third quarter. Volume growth of 56% was supported by broad prescribing to acute lymphoblastic leukemia patients following positive data from the registration-enabling E1910 study presented late 2022 and updated NCCN guidelines that were issued in May.
Long-term, we see significant additional growth potential for BLINCYTO from earlier lines of therapy. LUMAKRAS reported $52 million in sales for the third quarter, a decline of 31% year-over-year. $22 million of this decline was driven by ongoing reimbursement negotiations in France. We see future growth opportunities for LUMAKRAS driven by launches in new markets and our comprehensive global clinical development program.
Vectibix sales increased 2% year-over-year for the third quarter to a record $252 million, driven by higher net selling price and 4% volume growth, partially offset by unfavorable foreign-exchange impact. KYPROLIS grew 10% year-over-year, primarily driven by 8% volume growth. And Nplate sales increased 45% year-over-year for the third quarter, resulting from a $142 million order from the US government.
In the fourth quarter, we expect to fulfill an additional $62 million order for Nplate by the US government. Given the strong performance of our hematology-oncology products and the exciting new positive data presented at ESMO on our oncology pipeline, we look forward to helping more patients with their cancer therapy.
Overall, our execution is strong across the business, driving growth and demonstrating our dedication to serving patients and with the expansion of our rare disease portfolio, we're excited to serve many more patients around the world who can benefit from our therapies.
And with that, I'll turn it over to Vikram.