Last reviewed · How we verify

Placebo (saline water)

GlaxoSmithKline · FDA-approved active Biologic

Placebo saline water has no active pharmacological mechanism; therapeutic effects arise from the placebo effect and patient expectation.

Placebo saline water has no active pharmacological mechanism; therapeutic effects arise from the placebo effect and patient expectation. Used for Control/comparator agent in clinical trials (not a therapeutic indication).

At a glance

Generic namePlacebo (saline water)
Also known asNaCl water
SponsorGlaxoSmithKline
ModalityBiologic
PhaseFDA-approved

Mechanism of action

Saline water is a physiologically inert solution containing sodium chloride and water. Any observed clinical benefit in placebo-controlled trials results from psychological and neurobiological responses to the expectation of treatment rather than from direct molecular action. It serves as a control comparator in clinical trials to distinguish true drug efficacy from placebo response.

Approved indications

Common side effects

Key clinical trials

Primary sources

Every claim on this page is sourced from regulatory or scientific primary sources. See our editorial policy for full methodology.

SourceUsed for
ClinicalTrials.govTrial enrolment, design, endpoints, results

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