Synergy was not demonstrated with combinations of mecillinam and aminoglycosides (kanamycin, gentamicin, tobramycin, amikacin), chloramphenicol, tetracycline, or polymyxins.(PMID: 984795)发表于1976年aac杂志上的文献表明美西林与氨基糖苷类抗生素无联合作用。
Studies in vitro , in dogs and in man have shown that aminoglycosides are inactivated by penicillins.(https://doi.org/10.1093/jac/8.suppl_A.27)
1981年,发表于jac杂志上的文章还表明青霉素类抑制其活性。