DS 21/75 Prescription Charges for Drugs Given to Patients in Clinical Trials (Department of Health and Social Security, 1975) Published 2 April 2019 Topics: Service advice and planning In 2019, this remains the only known documented government guidance to the NHS on the subject. Attachments DS 21-75 Prescription Charges for Clinical Trial Patients DoH 1975 · PDF · 83 KB