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NCT00648973 · ClinicalTrials.gov registry record · Phase 4
To Determine if Diphenhydramine Works for Nasal Congestion at Two Different Doses
A Phase 4 study, sponsored by Johnson & Johnson Consumer and Personal Products Worldwide.
- Completed
- Registry status
- Phase 4
- Development phase
- 1,021
- Enrollment target
NCT00648973: Completed Phase 4 study, sponsored by Johnson & Johnson Consumer and Personal Products Worldwide.
NCT00648973 is a Phase 4 study that has completed, run by Johnson & Johnson Consumer and Personal Products Worldwide. The registered enrollment target is 1,021 participants, above the 518-participant average among 9,235 other Phase 4 trials with a reported enrollment target (97% higher). According to ClinicalTrials.gov, the official US trial registry.
The verdict
NCT00648973, a Phase 4 study, has completed, sponsored by Johnson & Johnson Consumer and Personal Products Worldwide.
- COMPLETED
- Registry status
- Phase 4
- Development phase
- 1,021 participants
- Enrollment target
Study Summary
The study was to determine if the drug worked to relieve nasal congestion experienced by people with seasonal allergies.
Interventions
- DRUG Diphenhydramine 25 mg
- DRUG Diphenhydramine 50 mg
- DRUG Pseudoephedrine 120 mg
Trial Details
| Field | Value |
|---|---|
| Enrollment Target | 1,021 participants |
| Start Date | 2006-11 |
| Est. Completion | 2007-05 |
| Phase | Phase 4 |
What the finished NCT00648973 record still lists
NCT00648973 is an interventional study that assigns participants to a tested intervention. Its 1,021 participants enrollment target places it among the larger protocols in the corpus, above the 518-participant average among 9,235 other Phase 4 trials with a reported enrollment target (97% higher).
The record links to 0 conditions, and to 3 interventions - of which Diphenhydramine 25 mg is the first listed.
NCT00648973 does not publish any study locations in the registry export this page uses.
Frequently Asked Questions
What is clinical trial NCT00648973 about?
NCT00648973 is a clinical study titled "To Determine if Diphenhydramine Works for Nasal Congestion at Two Different Doses". The study was to determine if the drug worked to relieve nasal congestion experienced by people with seasonal allergies.
What is the current status of trial NCT00648973?
This trial is currently completed. It is a Phase 4 study. The enrollment target is 1,021 participants. The study started on 2006-11. Estimated completion is 2007-05.
What interventions are being tested in trial NCT00648973?
The interventions under investigation include: Diphenhydramine 25 mg (DRUG), Diphenhydramine 50 mg (DRUG), Pseudoephedrine 120 mg (DRUG).
Who is sponsoring clinical trial NCT00648973?
This trial is sponsored by Johnson & Johnson Consumer and Personal Products Worldwide, which has 26 total clinical trials registered on ClinicalTrials.gov.
Learn More About Clinical Trials
How this trial's enrollment target compares
Where NCT00648973's enrollment target sits among peer trials
1,021 66th of 2000 higher than 1,935 of 2,000 other Phase 4 trials
participants (enrollment target), bucketed by value
Each bar is a band; taller bars hold more other Phase 4 trials. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source ClinicalTrials.gov registry export · 2026-08-08
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