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Delfa

Lead sponsor

Pfizer

52 Alzheimer’s disease and related dementias trials led. Source: ClinicalTrials.gov, as of July 21, 2026.

52

Trials led

0

Ongoing

8,884

Total enrollment

1,309

Sites

Distinct sites across this sponsor's lead trials. A site running several of them counts once, matching the map. Total enrollment sums each trial's reported enrollment, whether planned or actual.

Portfolio

How this sponsor's trials break down

Trials by phase

Phase 1
18
Phase 2
18
Phase 2/3
1
Phase 3
10
Not applicable
5

Trials by status

Completed
35
Terminated
16
Withdrawn
1

Trials led

TrialEligibility highlightPhaseStatusEnrollment
Non-Interventional Study With Aricept® EvessMultiple dementia etiologiesN/ACompleted370