Chlorhexidine and sulphadiazine react synergistically against strains of Pseudomonas. Proteus and Staphylococcus, with high factors of synergy. The impermeability of these strains to sulphadiazine is destroyed by low concentrations of chlorhexidine, permitting the accumulation of sulphadiazine which then inhibits protein synthesis. The combination of these drugs is bactericidal.

Chlorhexidine acts synergistically with the polymyxins B and E causing increased and rapid release of cell contents from Pseudomonas aeruginosa. While the polymyxin target molecule is phospholipid, evidence is provided for the proposal that the primary target for Chlorhexidine action is a protein component of the cytoplasmic membrane.

No abstract