RAYALDEE (calcifediol) by Merck & Co. is (25-hydroxyvitamin d 3 ) is a prohormone of the active form of vitamin d 3 , calcitriol (1,25‑dihydroxyvitamin d 3 ). First approved in 2016.
Drug data last refreshed 6h ago · AI intelligence enriched 2d ago
RAYALDEE (calcifediol) is an oral extended-release capsule containing 25-hydroxyvitamin D3, a prohormone that is converted to the active form of vitamin D3 (calcitriol) primarily in the kidney. It works by binding to vitamin D receptors to increase intestinal calcium and phosphorus absorption while reducing parathyroid hormone synthesis, indicated for secondary hyperparathyroidism in patients with stage 3-4 chronic kidney disease.
Product is at peak lifecycle stage with $41M in annual Part D spending and nearly 30K claims, indicating mature commercial operations with potential for modest team expansion rather than hypergrowth.
(25-hydroxyvitamin D 3 ) is a prohormone of the active form of vitamin D 3 , calcitriol (1,25‑dihydroxyvitamin D 3 ). Calcifediol is converted to calcitriol by cytochrome P450 27B1 (CYP27B1), also called 1-alpha hydroxylase, primarily in the kidney. Calcitriol binds to the vitamin D receptor in…
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Upgrade to Pro — $25/moWorking on RAYALDEE offers exposure to a stable, niche therapeutic area (secondary hyperparathyroidism in CKD) with mature commercial operations and zero competitive pressure, ideal for professionals seeking predictable career progression in a specialized market segment. The 7.5-year patent runway provides job stability but requires strategic thinking about post-LOE transitions.