A pharmaceutical formulation comprises, in combination with a penem of formula (I): ##STR1## in which: R.sup.1 is hydrogen or an organic substituent group; R.sup.2 is a fused bicyclic heterocyclic ring system of general formula: ##STR2## wherein R.sup.4 and R.sup.5 are independently hydrogen or one or more substituents replacing hydrogen atoms in the ring system shown; m is 2 or 3; p is zero, 1 or 2; and R.sup.3 is hydrogen, a salt-forming cation or an ester-forming group; and the symbol .dbd./.dbd. indicates that the double bond may be in either the E or Z configuration; and a pharmaceutically acceptable carrier; a .beta.-lactam antibiotic selected from the group consisting of ceftazidime, cefotaxime, amoxycillin, and piperacillin, and pharmaceutically acceptable derivatives thereof.
                            一种药物配方包括与
化学式(I)的青霉烯类药物结合:其中:R.sup.1为氢或有机取代基;R.sup.2为通式的融合双环杂环环系统:其中R.sup.4和R.sup.5独立地为氢或一个或多个取代氢原子的取代基;m为2或3;p为零、1或2;R.sup.3为氢、盐形成阳离子或酯形成基团;符号.dbd./.dbd.表示双键可以是E或Z构型中的任一种;以及药学上可接受的载体;从
头孢他啶、头孢噻
肟、
阿莫西林和匹培西林等β-内酰胺类抗生素中选择的一种;以及药学上可接受的衍
生物。