What is the name of the effect where two drugs work together to enhance each other's performance?

The synergistic effect refers to a situation where two drugs or substances interact in such a way that their combined effect is greater than the sum of their individual effects. This enhanced performance can improve therapeutic outcomes, making the treatment more effective than when either drug is used alone. For instance, one drug might enhance the absorption, efficacy, or duration of the other, creating a stronger overall effect, which is particularly important in medical treatments where maximizing effectiveness is desired.

In contrast, the other options describe different types of drug interactions that do not lead to the enhancing synergy seen in the correct answer. The antagonistic effect relates to two drugs working against each other, thereby reducing overall effectiveness. The cumulative effect refers to the gradual increase in effect from sequential doses, while "is synergistic" is a phrasing that doesn't specify the synergistic interaction itself. Therefore, identifying the synergistic effect is crucial for understanding how combinations of drugs can be leveraged to achieve better clinical outcomes.