When the text says that the effects of barbiturates and alcohol are additive, it means that
A) one drug diminishes the effect of the other.
B) both drugs together have no effect on behaviour.
C) their combined effect is stronger than either drug alone.
D) they combine to improved the performance of individuals who take them.
E) the drugs need to be combined in order to prevent behavioural problems.

Question

Quizplus · Accepted Answer

When two substances have additive effects, it means that their combined impact is greater than the effect of either substance on its own. In the context of barbiturates and alcohol, both being central nervous system depressants, their combined use amplifies the overall depressive effect beyond what either would cause individually.

When the Text Says That the Effects of Barbiturates and Alcohol