Assurance of aseptic preparation of medicines. Guidance to replace HSSE(OCE) 1/97 in Northern Ireland. Effective from April 2025 Topics: Pharmacy Date published: 26 September 2024 Effective from April 2025 Documents Assurance of aseptic preparation of medicines. Guidance to replace HSSE(OCE) 1/97 in Northern Ireland. Effective from April 2025 Adobe PDF (374 KB) Help viewing documents