Trial · NCT01501591
Interaction Between Drug and Placebo Effect:Randomized Placebo Controlled Trials May Not be Accurate in Determining Drug Effect Size
NCT01501591, Not applicable, Completed, King Faisal Specialist Hospital & Research Center
3 sourcestrials-2026-11-12-0.5.0
Cite this record
ConductScience Library. Interaction Between Drug and Placebo Effect:Randomized Placebo Controlled Trials May Not be Accurate in Determining Drug Effect Size. Trials, record NCT01501591. Release trials-2026-11-12-0.5.0, 12 Nov 2026. https://conductscience.org/library/trials/NCT01501591
On this page
Trial
As registered on ClinicalTrials.gov, in the graph's capture of the registry.
- Title
- Interaction Between Drug and Placebo Effect:Randomized Placebo Controlled Trials May Not be Accurate in Determining Drug Effect Size
- NCT number
- NCT01501591
- Status
- Completed
- Phases
- Not applicable
- Enrollment
- 480 participants, actual
- Lead sponsor
- King Faisal Specialist Hospital & Research Center
- Conditions
- Placebo Effect, Placebo Drug Interaction
- Interventions
- Hydroxizine, Placebo, hydroxyzine/placebo
- First posted
- 2011-12-29
- Last updated
- 2017-03-03
Source ClinicalTrials.gov
Registered outcomes4
Each outcome the trial registered, primary first, in ClinicalTrials.gov's words.
| List | Outcome | Time frame | Description |
|---|---|---|---|
| Primary | Area-under-the-curve for drowsiness | seven hours | Seven-hour-area-under-the-curve of drowsiness on 100 mm visual analog scales will be determined |
| Primary | Area-under-the-curve for dryness of the mouth | seven hours | Seven-hour-area-under-the-curve of dryness of the mouth on 100 mm visual analog scales will be determined |
| Secondary | Mean percent of time of reporting drowsiness on a dichotomous scale. | seven hours | Mean percent of time of reporting drowsiness on a dichotomous scale will also be determined. |
| Secondary | Mean percent of time of reporting dryness of mouth | seven hours | Mean percent of time of reporting dryness of mouth on a dichotomous scale will also be determined. |
Source ClinicalTrials.gov
Outcomes0
Each outcome the trial posted results for, in ClinicalTrials.gov's words.
None in this release.
Results by group0
Each measurement the trial posted, group by group, in the words and numbers it posted.
None in this release.
Participant flow0
How many started, completed or left each group, period by period.
None in this release.
Adverse events0
Each adverse event the trial posted, group by group: the participants affected out of those at risk.
None in this release.
Adverse event totals0
The totals the trial posted for each group.
None in this release.
Papers1
The papers the trial lists on ClinicalTrials.gov.
| PMID | Listed as |
|---|---|
| 27899067 | DERIVED |
Source PubMed
Grants0
The grants NIH RePORTER links to the trial, newest funded first: NIH's, and some of AHRQ's, CDC's, FDA's and VA's. Each shows its title, principal investigators, organization and funder in its newest year.
None in this release.
Trial comparisons0
Comparisons of the trial's two groups, calculated by ConductScience from the counts it posted.
None in this release.
Tests0
The ConductCognition tests this trial's registered outcomes name, as ScienceGraph matched them in trial-tests-2026-11-12-0.2.1.
None in this release.
Data dates
The day each source was copied for this release.
Sources 3
- ClinicalTrials.gov's posted results, through CTTI's AACTFreely available. Acknowledgement requested
- ClinicalTrials.govNo license stated
- NIH RePORTER's clinical studies and project filesPublic domain
Each source's terms
- ClinicalTrials.gov's posted results, through CTTI's AACTClinicalTrials.gov data via Aggregate Analysis of ClinicalTrials.gov (AACT), CTTI. CTTI makes its materials freely available and requests acknowledgement. https://aact.ctti-clinicaltrials.org/documentation/299
- ClinicalTrials.govnone stated
- NIH RePORTER's clinical studies and project filesPublic domain (NIH RePORTER)
ClinicalTrials.gov's data carry an international copyright outside the United States: https://clinicaltrials.gov/about-site/terms-conditions.
For software
Read this trial from software.
The record and each of its lists are JSON, twenty rows a page. No key.
GET https://conductscience.org/api/trials/v1/NCT01501591
GET https://conductscience.org/api/trials/v1/NCT01501591/registered