Phase 1 (run-in): Marevan®
Phase 2: Marevan®
Phase 3: generic warfarin #1
Phase 4: generic warfarin #2

Phase 1 (run-in): generic warfarin #1
Phase 2: generic warfarin #1
Phase 3: Marevan®
Phase 4: generic warfarin #2

Phase 1 (run-in): generic warfarin #1
Phase 2: generic warfarin #1
Phase 3: generic warfarin #2
Phase 4: Marevan®

Phase 1 (run-in): Marevan®
Phase 2: Marevan®
Phase 3: generic warfarin #2
Phase 4: generic warfarin #1

Phase 1 (run-in): generic warfarin #2
Phase 2: generic warfarin #2
Phase 3: Marevan®
Phase 4: generic warfarin #1

Phase 1 (run-in): generic warfarin #2
Phase 2: generic warfarin #2
Phase 3: generic warfarin #1
Phase 4: Marevan®

Atrial Fibrillation

Branded warfarin sodium tablets (manufacturer União Química Farmacêutica Nacional S/A, Brazil) by mouth; dose adjusted according to INR and medical judgement.

Marevan®

Generic warfarin sodium tablets, manufacturer (União Química Farmacêutica Nacional S/A, Brazil), by mouth; dose adjusted according to INR and medical judgement.

generic warfarin #1

Generic warfarin sodium tablets, manufacturer (Laboratório Teuto Brasileiro S/A, Brazil), by mouth; dose adjusted according to INR and medical judgement.

generic warfarin #2

Hospital São Paulo/Hospital Universitário da UNIFESP (University Hospital of UNIFESP)

Therapeutic Equivalence Between Branded and Generic WARFArin Tablets in Brazil

Therapeutic Equivalence Between Branded and Generic Warfarin Sodium Tablets in Adult Patients With Atrial Fibrillation in Brazil - Crossover Randomized Controlled Equivalence Trial

INR: International normalized ratio. INR will be assessed twice a month during the 16 weeks of study.
Delta INR will be calculated by the difference, in absolute numbers (i.e. in module), between the two valid INR measurements due for each patient with each formulation at each period. Difference between the delta INRs will be the outcome. We will compare generic to branded warfarin (Marevan®) and the generic formulations to each other.

INR: International normalized ratio. INR will be assessed twice a month during the 16 weeks of study.
We will calculate the mean INR for each formulation of warfarin; difference between the mean INRs will be the outcome. We will compare generic to branded warfarin (Marevan®) and the generic formulations to each other.

The warfarin dosage will be calculated as the sum of the dosage taken in the week before the study visit, as referred by the patient. We will calculate the mean dosage for each formulation of warfarin; difference between the mean dosage will be the outcome.
We will compare generic to branded warfarin (Marevan®) and the generic formulations to each other.

Includes ischemic stroke (differential diagnosis with hemorrhagic stroke by tomography) and thromboembolism of viscera or extremities (diagnosed by acute symptoms and relevant diagnostic tests).

Classified as major or minor bleeding events.
Major: intracranial hemorrhage, fatal bleeding, bleeding resulting in hemoglobin loss equal to or greater than 2.0 g / L, hemorrhage requiring transfusion, bleeding in sensitive areas such as the retina or pericardium.
Minor: all other bleeding.

TTR calculated by Rosendaal Method also known as linear interpolation method. We will calculate the mean TTR for each formulation of warfarin; difference between the mean TTRs will be the outcome.
We will compare generic to branded warfarin (Marevan®) and the generic formulations to each other.

menyanthes trifoliata/citrate

Therapeutic Equivalence Between Branded and Generic WARFArin Tablets in Brazil

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