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CompletedNCT01477411Updated Jan 18, 2012

A Drug-Drug Interaction Study of Digoxin and PA21

A Phase 1 interventional study of PA21 and Digoxin in Drug Interaction Potentiation, sponsored by Vifor Pharma. Completed at 1 site in United States. Open to participants aged 20 Years to 50 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2012-01-18.

Sponsored by Vifor Pharma · Phase 1, Interventional, and Basic science

Phase
Phase 1
Study type
Interventional
Enrollment
42
Allocation
Randomized
Ages
20 Years to 50 Years
Sex
All
01

Study summary

The purpose of this study is to determine if Digoxin is affected by PA21.

02

Conditions studied

  • Drug Interaction Potentiation

Keywords

  • Drug-drug interaction
  • Pharmacokinetics
  • PA21
03

In context

Lead sponsor

Vifor Pharma is the lead sponsor of 21 studies on the registry; none are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
20 Years to 50 Years
Sexes eligible
All
Accepts healthy volunteers
Yes

Inclusion criteria

  • Healthy volunteers
  • Written informed consent

Exclusion criteria

Exclusion Criteria:

  • No significant medical conditions
  • Pregnancy
05

Study design

Phase
Phase 1
Primary purpose
Basic science
Allocation
Randomized
Intervention model
Crossover assignment
Masking
None (open label)
Enrollment
42 participants (actual)

Study arms

  • Experimental
    PA21 and Digoxin with food

    The maximum dose of PA21 will be 15.0 g/day. The maximum dose of Digoxin will be 0.5 mg/day

    Drug: PA21 · Drug: Digoxin

  • Experimental
    No PA21; Digoxin with food

    The maximum dosage of Digoxin will be 0.5 mg/day

    Drug: Digoxin

  • Experimental
    PA21 with food and Digoxin 2hrs later

    The maximum dose of PA21 will be 15 g/day. The maximum dose of Digoxin will be 0.5 mg/day

    Drug: PA21 · Drug: Digoxin

Interventions

  • DrugPA21

    The maximum dose of PA21 will be 15.0 g/day.

  • DrugDigoxin

    The maximum dosage of Digoxin will be 0.5 mg/day

06

What researchers measure

Primary outcomes

  1. Area Under the Curve from time zero to 24 hours (AUC0-24)

    Area under the plasma concentration versus time curve from time zero (pre-dose) to 24 hours

    Time frame: pre-dose, 0.25, 0.5, 1, 1.5, 2, 2.5, 3, 4, 5, 6, 8, 12, 24, 48, 72 and 96 hours post digoxin dose on Days 0, 11, 22

  2. Area Under the Curve from time zero to infinite (AUC0-infinity)

    Area under the plasma concentration versus time curve from time zero (pre-dose) to extrapolated infinite time

    Time frame: pre-dose, 0.25, 0.5, 1, 1.5, 2, 2.5, 3, 4, 5, 6, 8, 12, 24, 48, 72 and 96 hours post Digoxin dose on Days 0, 11, 22

  3. Maximum observed plasma concentration (Cmax)

    Time frame: pre-dose, 0.25, 0.5, 1, 1.5, 2, 2.5, 3, 4, 5, 6, 8, 12, 24, 48, 72 and 96 hours post Digoxin dose on days 0, 11, 22

07

Study locations

1 site
  • ACRI - Phase 1
    Anaheim, California 92801, United States
08

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Jan 18, 2012, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
09

Registry details

Key details

Study ID
NCT01477411
Lead sponsor
Vifor Pharma
Responsible party
Sponsor
First posted
Nov 22, 2011
Start date
Nov 2011
Primary completion
Jan 2012
Completion
Jan 2012
Last update
Jan 18, 2012

Study contacts

Peter Winkle, MD
principal investigator · ACRI - Phase 1 (Advanced Clinical Research Institute)

Oversight

Data monitoring committee
No
View the source record on ClinicalTrials.gov ↗

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This study is completed, as verified in Jan 2012. You cannot join it, but the record below documents what was studied.

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