Placebo
A dummy treatment with no active medicine, used for comparison.
What it means
A placebo is made to look, taste, and feel like the real treatment but contains no active ingredient. It is given to one group so results can be compared against the group receiving the active treatment.
Why it matters if you take part
People often feel differently simply because they are receiving attention and expect to improve. Comparing against a placebo separates that effect from the treatment itself. In most trial records there is no placebo group at all.
What it looks like in practice
Look for an arm labelled "Placebo Comparator". A trial being placebo-controlled does not necessarily mean anyone goes untreated — often the placebo is given on top of usual care.
Related terms
Trials recruiting now that include a placebo group
601 recruiting trials in our Canadian corpus include a placebo group.
A Study Assessing the Effect of Dupilumab on Inducing Clinical Remission in Asthma
Asthma Control · PHASE3
A Study Evaluating Efruxifermin in Subjects With Non-Cirrhotic Nonalcoholic Steatohepatitis (NASH)/Metabolic Dysfunction-Associated Steatohepatitis (MASH) and Fibrosis
NASH With Fibrosis · PHASE3
A Study of Elritercept to Treat Anemia in Adults With Very Low, Low, or Intermediate Risk Myelodysplastic Syndromes (MDS) Who Need Regular Blood Transfusions
Myelodysplastic Syndromes · PHASE3
A Study to Learn About the Study Medicine Called Tilrekimig in People With Moderate-to Severe Eczema
Atopic Dermatitis · PHASE3
A Phase 3 Study to Evaluate the Safety and Efficacy of KarXT + KarX-EC for the Treatment of Agitation Associated With Alzheimer's Disease (ADAGIO-1)
Alzheimer Disease · PHASE3
Nabilone for Agitation Blinded Intervention Trial
Alzheimer Disease · PHASE3
This explains how clinical research works. It is not medical advice and does not describe any specific condition or treatment. Only a trial site can determine whether someone can take part in a study.