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Influenza Vaccination and Oral Anticoagulant Therapy

Randomized Blinded Cross-Over Clinical Trial Investigate the Interactions Between Influenza Vaccination and Oral Anticoagulant Therapy

Status
Completed
Phases
Phase 4
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT00222638
Enrollment
100
Registered
2005-09-22
Start date
2004-10-31
Completion date
2005-05-31
Last updated
2005-09-22

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Anticoagulants, Influenza Vaccines

Keywords

Oral anticoagulants, Influenza virus, Influenza vaccine, Pharmacological interference

Brief summary

The purpose of this study is to evaluate INR and INR related index and Warfarin weekly dosage variations after Influenza Vaccination

Detailed description

The pharmacokinetic and the pharmacodynamic interactions and the possible clinical events connected with the simultaneous administration of Oral Anticoagulants (OA) and the influenza virus vaccine were evaluated in several small studies which yielded conflicting results, thus encouraging additional investigations with prospective studies in order to obtain a more consistent evidence about the safety and efficacy of vaccination against influenza virus in patients on OA Treatment.

Interventions

DRUGInfluenza vaccination

Sponsors

University Of Perugia
Lead SponsorOTHER

Study design

Allocation
RANDOMIZED
Intervention model
CROSSOVER
Primary purpose
TREATMENT
Masking
SINGLE

Eligibility

Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No

Inclusion criteria

* OA Treatment * Stable anticoagulation (previous two controls in range) * Presence of indication for Influenza Vaccination * Life expectancy \> 6 months * Signed Informed consent

Exclusion criteria

* Absence of stable anticoagulation * Absence of indication for Influenza Vaccination * Life expectancy \< 6 months * Denied Informed Consent

Design outcomes

Primary

MeasureTime frame
1.Variations in INR value and in OAT weekly dosage after IV

Secondary

MeasureTime frame
1.Efficacy of IV in patients on OAT

Countries

Italy

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Mar 31, 2026