Glossary term

Randomised controlled trial: An RCT is a study in which participants are randomly assigned to treatment groups so results are less likely to be distorted by bias or confounding.

EssentialResearchSource quality: HighLast updated: 29 June 2026

Why this term matters

It is a cornerstone term for evidence discussions.

UK medical cannabis context

NICE relies heavily on controlled evidence when making recommendations.

What not to assume

Even RCTs can be small, limited or not fully generalisable.

Careful wording: Avoid claiming an RCT ends all debate automatically.

Related glossary terms

Related MCPH pages

Sources and review notes

This entry is educational vocabulary, not medical advice. Suitability, prescribing, product choice and monitoring belong with a qualified clinician or pharmacist.