1.   Half the participants took daily oral doses of hydroxyurea and the rest had a placebo, or dummy drug.

2.   The company decided to extend its study, switching to Aptosyn the patients who had been given a placebo, a dummy drug, during the trial.

3.   The Israeli researchers said triptorelin needed further study because it was not tested in a controlled trial against a placebo, or dummy drug.

4.   Those who took half that were no better off than people given a placebo, or dummy drug.

5.   To that end, the government-sponsored studies compare various short courses of AZT with a dummy drug, or placebo.

6.   Eighteen patients taking a dummy drug while on a high-protein diet saw no significant improvement.