PT - JOURNAL ARTICLE ED - , TI - Talampicillin AID - 10.1136/dtb.14.7.27 DP - 1976 Mar 26 TA - Drug and Therapeutics Bulletin PG - 27--28 VI - 14 IP - 7 4099 - http://dtb.bmj.com/content/14/7/27.short 4100 - http://dtb.bmj.com/content/14/7/27.full SO - Drug Ther Bull1976 Mar 26; 14 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.