'When testing new drugs, a control group is given this nonmedical substance  made of sugar or a saline solution'
Placebo
MEDICINE: When testing new drugs, a control group is given this nonmedical substance  made of sugar or a saline solution
When testing new drugs, a control group is given this nonmedical substance  made of sugar or a saline solution
When testing new drugs, a control group is given this nonmedical substance  made of sugar or a saline solution
MEDICINE
Placebo
MEDICINE