Two different drugs (each with its own mechanism of action)are administered to a patient in an attempt to relieve bronchoconstriction.The ordering physician hopes that the effect of the drug pair will be greater than the sum of the separate effects of each individual drug.If successful,this would be an example of

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Potentiation is a special case of synergism in which one drug has no effect but can increase the activity of another drug.Synergism occurs when two drugs act on a target organ by different mechanisms of action and the effect of the drug pair is greater than the sum of the separate effects of the drugs.Additivity occurs when two drugs act on the same receptors and the combined effect is the simple linear sum of the effects of the two drugs,up to a maximal effect.Tolerance describes a decreasing intensity of response to a drug over time.

Two Different Drugs (Each with Its Own Mechanism of Action)are