The calculation process of and the list of drugs were described in Additional file 1: Table S2

Manufactured for: Revised: November 2025 PACKAGE LABEL.PRINCIPAL DISPLAY PANEL Vial Label - 1 mL: NDC 87188-111-01 Rx Only Cyanocobalamin Injection, USP 1,000 mcg/mL For Intramuscular or Subcutaneous Use Only 1 mL Multiple-Dose Vial Carton Label - 1 mL: NDC 87188-111-90 Rx Only Cyanocobalamin Injection, USP 1,000 mcg/mL For Intramuscular or Subcutaneous Use Only 25 X 1 mL Multiple-Dose Vials Vial Label - 10 mL: NDC 87188-112-01 Rx Only Cyanocobalamin Injection, USP 10,000 mcg/10 mL (1,000 mcg/mL) For Intramuscular or Subcutaneous Use Only 10 mL Multiple-Dose Vial Carton Label - 10 mL: NDC 87188-112-01 Rx Only Cyanocobalamin Injection, USP 10,000 mcg/10 mL (1,000 mcg/mL) For Intramuscular or Subcutaneous Use Only 1 x 10 mL Multiple-Dose Vial Vial Label - 30 mL: NDC 87188-113-01 Rx Only Cyanocobalamin Injection, USP 30,000 mcg/30 mL (1,000 mcg/mL) For Intramuscular or Subcutaneous Use Only 30 mL Multiple-Dose Vial Carton Label - 30 mL: NDC 87188-113-01 Rx Only Cyanocobalamin Injection, USP 30,000 mcg/30 mL (1,000 mcg/mL) For Intramuscular or Subcutaneous Use Only 1 x 30 mL Multiple-Dose Vial More about cyanocobalamin Check interactions Compare alternatives Pricing & coupons Reviews (31) Drug images Side effects Dosage information During pregnancy Drug class: vitamins

Retatrutide is not routinely available or prescribed in the UK outside of clinical trials, and there are no legitimate supply routes for general clinical use at this time
Clinicians should apply clinical judgement to select an individualised approach and may choose between: A one-to-two-week washout before semaglutide initiation, which is preferred for patients with significant side effects