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The efficacy of homoeopathic potassium phosphate for mental fatigue
DOI 10.1186/ISRCTN16521161
ClinicalTrials.gov identifier
EudraCT number
Public title The efficacy of homoeopathic potassium phosphate for mental fatigue
Scientific title A randomised placebo-controlled trial of homoeopathic potassium phosphate 6x for mental fatigue
Acronym N/A
Serial number at source N/A
Study hypothesis That a homeopathic specific used in the treatment of attentional problems will improve performance on an attention test.
Lay summary Not provided at time of registration
Ethics approval Health Services Research Governance Committee (HSRGC) of the University of York approved on the 13th March 2007. As this trial did not involve any patients, it did not have to go through the National Health Service ethics system.
Study design Randomised placebo-controlled cross-over trial
Countries of recruitment United Kingdom
Disease/condition/study domain Mental fatigue
Participants - 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
Participants - 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
Anticipated start date 01/06/2007
Anticipated end date 01/09/2007
Status of trial Completed
Patient information material Not available in web format, please contact mb55@york.ac.uk to request a patient information sheet
Target number of participants 86
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 unmedicated 90% ethanol/water solution

Treatment consisted of a single dose, crossed over at the same time on the same day one week later. There was no follow-up.
Primary outcome measure(s) 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 outcome measure(s) No secondary outcome measures
Sources of funding Department of Health (UK) - National Coordinating Centre for Research Capacity Development, Post-Doctoral Fellowship in Complementary Medicine
Trial website
Publications 1. 2012 results in http://www.ncbi.nlm.nih.gov/pubmed/23025450
Contact name Dr  Michael  Emmans Dean
  Address Department of Health Sciences
University of York
Seebohm Rowntree Building
University Road
  City/town York
  Zip/Postcode YO10 5DD
  Country United Kingdom
Sponsor University of York (UK)
  Address University Road
  City/town York
  Zip/Postcode YO10 5DD
  Country United Kingdom
  Email info@york.ac.uk
  Sponsor website: http://www.york.ac.uk/
Date applied 25/06/2009
Last edited 23/05/2013
Date ISRCTN assigned 01/09/2009
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