Stability of flucytosine 100 mg/mL suspension as an alternative to intravenous administration

Abstract

Background: Flucytosine is an antifungal agent used in combination with other medicines for the treatment of fungal infections. It was available as intravenous (IV), oral tablet, and capsule formulations up until October 2021, when the IV product, Ancotil, was discontinued with no alternative brands available. Aim: This study aimed to formulate a suitable formulation with appropriate stability data for medium to long-term nasogastric (NG) administration use. Method: Flucytosine 500 mg tablets (Ancotil) were crushed and suspended in (1) Ora-Plus (OP) + Ora-Sweet (OS) and (2) Ora-Blend (OB) to produce 100 mg/mL suspensions (n = 3 for each suspending base) that were stored at 2–8°C in amber gla..