Medical Information Only. Consult your healthcare provider before considering clinical trial enrollment.
Bioavailability: early-phase trial registry
2 of 9 indexed Bioavailability trials are currently recruiting, with more weight in Phase 1-2.
Corpus placement: #1,916 of 28,707 conditions by registered trial count.
9 US clinical trials · 2 currently recruiting · #1,916 of 28,707 conditions by registered trial count
Bioavailability: 9 US clinical trials tracked, 2 recruiting.
Bioavailability is the subject of 9 registered US clinical trials on ClinicalTrials.gov, 2 of them currently open to new participants. 0 are in Phase 3-4 (later-stage) and 7 in Phase 1-2 (earlier-stage). The most active sponsor is Pfizer, running 2 of these trials.
Enrollment posture brief
Registry condition bioavailability
OPEN 2 | RECR 22% | LATE 0 | EARLY 7 | RANK #1916 | SPON 2
Volume-matched condition peers
Nearest open-share peer: Acne (22% recruiting · 27 trials)
Bioavailability lists 2 open slots (22% of 9 indexed trials). Peers are matched on registered volume, not therapeutic-area browse lists. How peer matching works →
Key findings
What ClinicalTrials.gov does not surface for Bioavailability on its own pages , computed from the registry mirror as of 2026-08-08. Each line carries its own denominator so it can be quoted as it stands.
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Bioavailability is recruiting below its size-band peers.
2 of 9 indexed trials (22.2%) are open to enrollment, against a 46.5% average across 27,806 conditions with fewer than 20 trials. The peer set uses the same ClinicalTrials.gov-derived counts as this page.
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One sponsor concentrates Bioavailability research.
Pfizer accounts for 2 of 9 trials (22.2%). 8 distinct sponsors appear on at least one study for this condition label.
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Most Bioavailability trials plan to enrol fewer than 100 people.
Median target enrolment is 36 among the 9 trials that report a genuine target (sentinel values excluded). 9 of those (100%) plan for fewer than 100 participants.
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Bioavailability research is mostly interventional.
9 interventional and 0 observational studies make up this index (100% interventional). Study type is sponsor-reported on ClinicalTrials.gov.
Open and recent trials
9 total, page 1 of 1
Curcumin and Retinal Study
Texas Tech University Health Sciences Center
NCT05774704
Bioavailability of Ration Items Containing Tart Cherry Extract
United States Army Research Institute of Environmental Medicine
NCT07063173
Pharmacokinetics Study of Oral Rivaroxaban in Healthy Participants
Janssen Scientific Affairs
NCT01464450
A Study to Evaluate Relative Bioavailability, Proton Pump Inhibitor (PPI) (Rabeprazole) Effect, Food Effect and Particle Size Effect of New Acalabrutinib Tablet in Healthy Subjects
AstraZeneca
NCT04488016
A Study of TEPEZZA Subcutaneous Administration in Healthy Adults
Amgen
NCT06563856
Study to Evaluate the Safety, Tolerability and Pharmacokinetics of Multiple Ascending Doses of Intravenous WCK 771
Wockhardt
NCT05640531
Bioavailability of EPA + DHA in a SMEDS Formulation
Midwest Center for Metabolic and Cardiovascular Research
NCT03443076
Relative Bioavailability Study of PF-07321332/Ritonavir Oral Powder Relative to the Commercial Tablets in Healthy Participants
Pfizer
NCT05263921
Relative Bioavailability Study of 4 Different Formulations of PF-07321332 Relative to the Commercial Tablet Formulation
Pfizer
NCT05263895
Phase Distribution
| Phase | Trial count |
|---|---|
| Phase 1 | 7 |
Top Sponsors
Named interventions
Most-linked intervention names on Bioavailability records (sponsor-reported on ClinicalTrials.gov). Counts are trial links, not unique products.
US sites by state
Facility locations filed on Bioavailability trials. A trial with sites in several states counts in each.
Source: ClinicalTrials.gov, National Library of Medicine. Data is informational only.
Related
What to do with this Bioavailability page
9 registered trials, 2 currently recruiting, is a starting point for a conversation, not a diagnosis or a recommendation.
- 2 Bioavailability trials are currently recruiting, check eligibility criteria before contacting a site. Browse recruiting trials
- Pfizer sponsors the most Bioavailability trials on record, review their full trial history before evaluating a specific study. See Pfizer's trials
- Bring the specific trial ID (NCT number) to your own doctor before enrolling, this page is a directory, not medical guidance. Read the trial-finding guide
Trial and recruiting counts reflect ClinicalTrials.gov registry status as of the data vintage above; individual trial eligibility and enrollment status can change.
Every figure on PlainTrial is rendered directly from the ClinicalTrials.gov registry, no number is typed in by an editor. This Bioavailability condition card totals 9 registered trials; most-linked intervention PF-07321332/ritonavir; top US site state Texas. See our editorial standards & corrections policy, the methodology behind these numbers, the data changelog, or report a data error.