RT Journal Article SR Electronic T1 Talampicillin JF Drug and Therapeutics Bulletin JO Drug Ther Bull FD BMJ Publishing Group Ltd SP 27 OP 28 DO 10.1136/dtb.14.7.27 VO 14 IS 7 YR 1976 UL http://dtb.bmj.com/content/14/7/27.abstract AB Talampicillin (Talpen) is the phthalidyl ester of ampicillin. During absorption the ester is hydrolysed in the gut to ampicillin and hydroxy-methylbenzoic acid. Talampicillin is marketed by Beecham which also produces ampicillin (Penbritin). Amoxycillin (Amoxil) is not an ester, but has a similar structure and the same antibacterial spectrum as ampicillin.1 Amoxycillin is marketed by Bencard which is a subsidiary of Beecham.