The efficacy of homoeopathic potassium phosphate for mental fatigue

A randomised placebo-controlled trial of homoeopathic potassium phosphate 6x for mental fatigue

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

ISRCTN

Registry ID

ISRCTN16521161

Enrollment

Registered

2009-09-01

Start date

2007-06-01

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

Mental fatigue Signs and Symptoms Malaise and fatigue

Interventions

Intervention: a single homeopathic dose of 0.6 g lactose powder, medicated with Kali-phos 6x (in 90% ethanol/water solution) Control: identical placebo consisting of 0.6 g lactose powder, treated with

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: 1. Healthy staff and student volunteers, aged 19 to 62 years, either sex 2. Recruited from within the University of York 3. Reporting fatigue from mental work

Exclusion criteria

Exclusion criteria: 1. Current use of homeopathy for any condition 2. Current prescribed stimulant medication 3. Use of self-prescribed stimulants (e.g. caffeine-based products) during the study 4. Chronic fatigue 5. Unable to communicate in English

Design outcomes

Primary

Measure	Time frame
Accuracy on the Stroop-colour-word test of executive function, measured 10 minutes after medication (at the same time on the same day one week apart).	—

Secondary

Measure	Time frame
No secondary outcome measures	—

Countries

United Kingdom

Outcome results

None listed

Source: ISRCTN (via WHO ICTRP) · Data processed: Mar 25, 2026