MedisourceRx

CLOSEOUT LETTER MedisourceRx MARCS-CMS 717970 — July 27, 2026 More Warning Letters Warning Letters About Warning and Close-Out Letters Delivery Method: VIA ELECTRONIC MAIL READ/DELIVERY RECEIPT Product: Drugs Recipient: Recipient Name Daniel D. Hernandez Recipient Title Director of Quality MedisourceRx 10525 Humbolt Street Los Alamitos , CA 90720-5401 United States Issuing Office: Center for Drug Evaluation and Research (CDER) United States Secondary Issuing Offices United States Dear Mr. Hernandez: The U.S. Food and Drug Administration (FDA) has completed an evaluation of your firm’s corrective actions in response to our warning letter #717970, issued on December 12, 2025. Based on our evaluation, it appears that you have adequately addressed the violations contained in this warning letter. You are expected to take all necessary steps to ensure compliance with the Federal Food, Drug, and Cosmetic Act and FDA’s implementing regulations. This letter will not preclude any future regulatory action should violations be observed during a subsequent inspection or through other means. Sincerely, /S/ Matthew J. Lash Acting Director Office of Compounding Quality and Compliance Office of Compliance Center for Drug Evaluation and Research Content current as of: 07/30/2026 Regulated Product(s) Drugs