What does “Placebo” mean?

An inactive comparator used in trials, and by extension the improvement people report after receiving one.

Placebo in plain English

An inactive comparator used in trials, and by extension the improvement people report after receiving one.

Placebo responses are large in exactly the areas cannabis-based medicines are used for: pain, sleep, anxiety and nausea. This is not imagination; it is a measurable effect.

A controlled study in obsessive-compulsive disorder found participants reported reduced anxiety after every condition, including placebo. Any uncontrolled report of benefit has to contend with that explanation first.

Frequently asked questions

What does placebo mean?

An inactive comparator used in trials, and by extension the improvement people report after receiving one.

Sources and further reading

Every factual statement on this page is drawn from the following public sources. Links open in a new tab and are not affiliated with Flora House.

  1. NICE guideline NG144: Cannabis-based medicinal products
  2. NHS: Medical cannabis (and cannabis oils)
  3. MHRA: The supply, manufacture, importation and distribution of unlicensed cannabis-based products for medicinal use

Patient guide · Written by the Flora House editorial team · Last reviewed: 8 September 2026