They have prescribed drugs to healthy women without first scrutinizing the evidence (or lack thereof) of drug efficacy.

These experiments have furthermore opened new avenues for preventative drug efficacy.

Genetic information may allow physicians to tailor therapy to a given patient, in order to increase drug efficacy and minimize side effects.

Failure attributed to lack of drug efficacy occurs in approximately 10% of those with mild-to-moderate disease.

No convincing clinical trials exist on which to base recommendations for the management of treatment failure attributed to lack of drug efficacy.

Failure to comply (including skipping doses to save money) is a common behavior, but it can reduce drug efficacy.

Inappropriate storage and handling also affect drug efficacy.

This can be an important diagnostic and assessment aid in medical practice and clinical evaluation of drug efficacy.

Toxicology, drug efficacy, and other information have yet to be determined with further research completed in clinical settings.

The current antidepressants have late drug efficacy about 3-6 weeks, besides, many patients' illness cannot be alleviated.