<unk>  is one of three responses possible when two or more<unk> s are used simultaneously to treat an infection. In the<unk> stic response, the applied<unk> s work together to produce an effect more potent than if each<unk>  were applied singly. Compare to the additive effect, where the potency of an<unk>  combination is roughly equal to the combined potencies of each<unk>  singly, and antagonistic effect, where the potency of the combination is less than the combined potencies of each<unk> .
Antibiotic synergy
Antimicrobial resistance
Opportunistic infection
Drug interaction
Drug resistance
Acute toxicity
Cross-reactivity
Superinfection