Final answer:
A situation in which two drugs work to enhance each other is called a synergistic drug interaction.
Step-by-step explanation:
A situation in which two drugs work to enhance each other is called a synergistic drug interaction.
For example, trimethoprim and sulfamethoxazole (Bactrim) are two antibacterial drugs that, when administered together, provide a synergistic interaction resulting in a better efficacy than either drug alone. Individually, these drugs inhibit bacterial growth, but when combined, they are bactericidal.