The randomised controlled trial to evaluate effectiveness of gargling for the prevention of upper respiratory tract infections

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

ISRCTN

Registry ID

ISRCTN67680497

Enrollment

300

Registered

2004-11-03

Start date

2002-11-01

Completion date

Unknown

Last updated

2015-01-13

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Upper respiratory tract infections Respiratory Acute upper respiratory tract infections of multiple and unspecified sites

Interventions

Gargling with tap water, gargling with diluted povidone-iodine, and usual care

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: Healthy volunteers aged 18-65 years

Exclusion criteria

Exclusion criteria: Not provided at time of registration

Design outcomes

Primary

Measure	Time frame
Incidence of upper respiratory track infections (URTI).	—

Secondary

Measure	Time frame
Severity of upper respiratory track infections (URTI).	—

Countries

Japan

Outcome results

None listed

Source: ISRCTN (via WHO ICTRP) · Data processed: Feb 4, 2026