RT Journal Article SR Electronic T1 Correction JF Drug and Therapeutics Bulletin JO Drug Ther Bull FD BMJ Publishing Group Ltd SP 40 OP 40 DO 10.1136/dtb.16.10.40 VO 16 IS 10 YR 1978 UL http://dtb.bmj.com/content/16/10/40.abstract AB Prescription Charges and Official Preparations (14 April 1978 p.29) line 3 should read ‘the British Pharmacopoeia (BP) or British Pharmaceutical Codex (BPC)’.