No placebo-controlled clinical studies exist so far to support aphrodisiac activity.

Large placebo-controlled studies of olanzapine and aripiprazole were underway in early 2008.

Two double-blind, placebo-controlled studies found no statistically significant effect on autistic behaviors, and reported few side effects.

This same side effect makes methylene blue difficult to test in traditional placebo-controlled clinical studies.

Efficacy was also observed in more severely depressed patients in all positive placebo-controlled studies.

A similar placebo-controlled study is now under way in women.

Such a test or clinical trial is called a placebo-controlled study.

As a result, "placebo-controlled studies often are designed in such a way that disadvantages the placebo condition".

Valproate in the treatment of acute mania: a placebo-controlled study.

"If you put this under a microscope in a double-blind, placebo-controlled study, it would be hard to say what helped her," he said.