Murdo Gordon
Executive Vice President, Global Commercial Operations at Amgen
Thanks, Bob. In the 4th-quarter, product sales grew 11% year-over-year, capping off a year of growth fueled by strong execution across the business. For the full-year, product sales grew 19% and 10 products grew by double-digits or better, creating strong momentum for growth in 2025 and beyond. Two products on a strong growth trajectory are Repatha and EVENITY, which together grew 35% year-over-year, driven by 39% volume growth and accounting for nearly $1 billion in sales growth in the year. Both of these important brands serve large patient populations that are mostly untreated despite the availability of highly impactful therapies, indicating robust growth potential.
Repatha sales increased 36% in 2024, reaching over $2.2 billion in sales. There are 100 million patients globally in need of effective treatment for lowering their LDLC. And we see strong potential for growth of Repatha around the world as physicians, patients and payers recognize the importance of therapies like Repatha for patients at-risk of major cardiovascular events. In the United States, Repatha sales grew 44% in 2024 with volume growth of 54%. The majority of patients with elevated LDLC are in the primary-care setting. And in 2024, our increased investment focused on primary-care physicians improved the number of Repatha prescribers by 50%, supporting future growth strategy.
Our direct-to-patient education efforts doubled the number of patients who asked their doctor for Repatha. Volume growth was further supported by Repatha's broad access and reimbursement, and we see more payers seeking to ease or even remove prior authorization barriers, making Repatha more accessible and affordable for patients. Cardiologists and primary-care physicians reported in a recent survey that Repatha access has improved significantly versus two years ago. Outside the US, Repatha continues to grow across major markets despite increased competition in this segment. Over the past several years, the price of Repatha has been impacted by an expansion of coverage in the US and the growth of new markets around the world.
Moving forward, we expect less price erosion for Repatha with 2025 net price expected to decline by mid-single digits or less. Sales increased 35% in 2024, reaching almost $1.6 billion in sales. Is the only therapeutic that both builds bone and slows resorption, which can play a critical role in reducing fracture risk for millions of women who are post-menopausal. Despite the significant need, only 210,000 patients in the US have been treated with AVENITY to date, while millions remain at-risk. With over 90% of very high-risk patients not currently receiving appropriate treatment, we see a significant opportunity to grow in 2025 and beyond.
In the US, continues to be the segment leader in the bone builder market. We drove a 14% quarter-over-quarter increase in new customers ordering and saw an increase in prescription volume from both established and new prescribers. We've increased our investment in and have fully shifted the focus of our US bone field force towards evenity. I'll move to our rare disease portfolio, which delivered over $4.5 billion in sales in 2024. TEPEZZA, our largest product in the rare disease portfolio, generated sales of $1.9 billion in the year, representing 5% year-on-year growth. Since launch, TEPEZZA has had a positive impact for thousands of patients living with thyroid eye disease.
There are roughly 100,000 patients suffering from thyroid eye disease in the US who could benefit from TEPEZZA and to reach them, we've intensified our efforts to engage a broad prescriber base of oculoplastic surgeons, ophthalmologists and endocrinologists. We're moving quickly in international markets to secure regulatory approval for TEPEZZA, which will drive additional growth. And we've successfully launched TEPEZA in Japan where it's the first and only medicine approved to treat active thyroid eye disease. In 2025, we expect to launch TEPEZZA in seven additional countries.
In inflammation, TEZPIRE continues its strong trajectory with nearly $1 billion in sales in the year, a 71% year-over-year increase. We've driven increased adoption by pulmonologists supported by TEZSPIRE's unique profile to treat patients with multiple severe uncontrolled asthma triggers and drivers. TESPIRE has strong future growth potential given the need to treat the 2.5 million patients worldwide with severe uncontrolled asthma. Our innovative oncology portfolio, including,, Vectabix, KYPROLIS, Enplate, and contributed almost $8 billion in sales for the full-year. Year-over-year sales grew 11%, driven by volume growth and higher net selling price.
Our leading bispecific T-cell engager platform, which developed and, continues to address critical unmet needs in oncology while providing significant opportunities for future growth. BLINCYTO sales grew 41% for the full-year, reaching over $1.2 billion in sales. We expect continued strong growth in 2025, driven by broad prescribing across academic and community segments. Physician prescribing is growing and compelling new clinical data is redefining as the standard-of-care for both adult and pediatric patients with Philadelphia chromosome negative B-cell ALL.
Our US launch of for the treatment of patients with extensive-stage small-cell lung cancer who are progressing on or after chemotherapy is off to a strong start and generating $115 million in sales in seven months since launch. We see increasing breadth of adoption in both academic and community settings, settings driven by strong clinical conviction for transformational efficacy. Indelta has treated approximately 2,000 patients since launch. Each year, an estimated 8,000 to 10,000 patients progress to second-line treatment for extensive stage small-cell lung cancer. Our medical and commercial teams are operating with urgency to bring to more patients living with this aggressive disease.
Sales of our biosimilar products were $2.2 billion in 2024, an increase of 16% year-over-year. In the 4th-quarter, our team readily executed the launch of, a biosimilar to EYLEA, with nine weeks of sales totaling $31 million. Response from retina specialists to has been very positive with strong intent to purchase and administer this high-quality biosimilar delivered in an easy-to-use prefilled syringe. The next wave of biosimilar launches continues in 2025. In January, building on the strong introduction of Pablo at the end of 2024, we launched Wizlana, a biosimilar to STELARA. And in the second-quarter, we expect to launch, a biosimilar to Solaris.
With this next wave of launches, we anticipate robust growth and attractive returns from our biosimilar portfolio. 2024 was a strong year of execution across Amgen. We view execution as a team effort, the tightly coordinated integration between research and development, manufacturing operations and our commercial teams enables us to serve record numbers of patients across the portfolio and around the world. This relentless cross-enterprise focus will accelerate our ability to reach even more patients with Amgen Medicines in 2025.
And with that, I'll hand it over to Jay.