Which term describes a stronger effect when more than one drug is taken?

• A. Synergism
• B. Antagonism
• C. Potentiation
• D. Allergy

Answer: (A)

When two drugs are taken together, their combined effect can be greater than the sum of their individual effects. This stronger interaction is described as synergy. It happens because the drugs influence different pathways or receptors in a way that amplifies the overall action. Antagonism would instead lessen or block one or both drugs’ effects. Potentiation means one drug increases the effect of another, but the first drug may not have its own effect to contribute to the total, so it’s a different kind of boosting. Allergy is an immune reaction and not about how drugs interact to change effectiveness.