{"id":38255,"date":"2026-03-17T08:23:06","date_gmt":"2026-03-17T12:23:06","guid":{"rendered":"https:\/\/tvdelmarva.com\/wp\/pfizers-new-breast-cancer-treatment-shows-40-reduction-in-disease-progression\/"},"modified":"2026-03-17T08:23:06","modified_gmt":"2026-03-17T12:23:06","slug":"pfizers-new-breast-cancer-treatment-shows-40-reduction-in-disease-progression","status":"publish","type":"post","link":"https:\/\/tvdelmarva.com\/wp\/pfizers-new-breast-cancer-treatment-shows-40-reduction-in-disease-progression\/","title":{"rendered":"Pfizer’s New Breast Cancer Treatment Shows 40% Reduction in Disease Progression"},"content":{"rendered":"\n
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Pharmaceutical company Pfizer announced Tuesday that a new experimental drug combination showed promising results in treating breast cancer patients, demonstrating a 40% reduction in the risk of disease progression or death.<\/p>

The treatment pairs Pfizer’s investigational drug atirmociclib with fulvestrant, an established hormone therapy. Researchers conducted the mid-stage clinical trial on patients whose breast cancer had metastasized and who had undergone previous treatments.<\/p>

The study compared this new drug combination against standard treatment options including fulvestrant alone or a combination of everolimus and exemestane, which represents a commonly prescribed targeted therapy approach for postmenopausal women diagnosed with the most prevalent form of breast cancer.<\/p>

Trial participants included patients whose cancer had returned quickly following treatment with CDK4\/6 inhibitors, a patient population that typically presents greater treatment challenges. More than 90% of study participants began taking atirmociclib within three months after discontinuing their previous cancer medication.<\/p>

According to Pfizer, the experimental treatment demonstrated a tolerable safety profile, with only 6.4% of patients discontinuing the therapy due to adverse effects. The company noted that overall survival statistics, which serve as a secondary endpoint, remain preliminary and insufficient for drawing definitive conclusions at this time.<\/p>

The positive trial results will support Pfizer’s plans to evaluate atirmociclib in earlier stages of breast cancer treatment, including first-line therapy and early-stage disease, where extended disease management could benefit a larger patient population.<\/p>

Atirmociclib functions as an oral medication that specifically targets CDK4, a protein involved in cell cycle regulation that promotes tumor development. Pfizer has already initiated a comprehensive late-stage clinical study examining the drug’s effectiveness in patients recently diagnosed with metastatic breast cancer.<\/p>","protected":false},"excerpt":{"rendered":"

Pharmaceutical giant Pfizer announced Tuesday that its experimental breast cancer drug combination reduced the risk of disease progression or death by 40% in clinical trials. The treatment combines atirmociclib with hormone therapy fulvestrant and was tested on patients whose cancer had spread and returned after previous treatments.<\/p>\n","protected":false},"author":4,"featured_media":38254,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[837],"tags":[],"class_list":["post-38255","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-health"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/tvdelmarva.com\/wp\/wp-content\/uploads\/2026\/03\/news-1773750186502.jpg?fit=450%2C325&ssl=1","jetpack_shortlink":"https:\/\/wp.me\/pbtNqq-9X1","jetpack-related-posts":[{"id":65359,"url":"https:\/\/tvdelmarva.com\/wp\/delaware-pharmaceutical-company-secures-rights-to-new-breast-cancer-treatment\/","url_meta":{"origin":38255,"position":0},"title":"Delaware Pharmaceutical Company Secures Rights to New Breast Cancer Treatment","author":"Admin","date":"May 12, 2026","format":false,"excerpt":"Rigel Pharmaceuticals announced Tuesday it has acquired worldwide licensing rights to a newly approved breast cancer medication developed by Pfizer and Arvinas. The company will pay $85 million initially and could pay up to $320 million more based on future milestones.","rel":"","context":"In "Business"","block_context":{"text":"Business","link":"https:\/\/tvdelmarva.com\/wp\/category\/business\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/tvdelmarva.com\/wp\/wp-content\/uploads\/2026\/05\/news-1778591181637.png?fit=1200%2C675&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/tvdelmarva.com\/wp\/wp-content\/uploads\/2026\/05\/news-1778591181637.png?fit=1200%2C675&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/tvdelmarva.com\/wp\/wp-content\/uploads\/2026\/05\/news-1778591181637.png?fit=1200%2C675&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/tvdelmarva.com\/wp\/wp-content\/uploads\/2026\/05\/news-1778591181637.png?fit=1200%2C675&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/tvdelmarva.com\/wp\/wp-content\/uploads\/2026\/05\/news-1778591181637.png?fit=1200%2C675&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":36859,"url":"https:\/\/tvdelmarva.com\/wp\/swiss-pharmaceutical-giant-roche-stock-plunges-after-cancer-drug-trial-setback\/","url_meta":{"origin":38255,"position":1},"title":"Swiss Pharmaceutical Giant Roche Stock Plunges After Cancer Drug Trial Setback","author":"Admin","date":"March 14, 2026","format":false,"excerpt":"Roche's stock value fell over 5% following disappointing results from a clinical trial of their breast cancer medication giredestrant. 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