JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
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SSRI co-medication with NOAC or VKA does not increase hospitalisation for bleeding: A retrospective nationwide cohort study in Austria 2010-2015.

OBJECTIVES: Non-vitamin K oral anticoagulants (NOACs) or vitamin K antagonists (VKAs) are used for the prophylaxis and treatment of thromboembolic events. A potential drug-drug interaction and increased bleeding events have been reported with co-medication of selective serotonin receptor inhibitors (SSRIs) and VKA. The aim of this study was to investigate the bleeding risk of a coprescription of NOAC or VKA with SSRI.

METHODS: Patients with prescription of NOAC or VKA and an antidepressant drug therapy (ADTx) were selected from the drug reimbursement database of 13 Austrian health insurance funds. For this cohort, hospital discharge diagnoses for gastrointestinal bleeding, cerebral haemorrhage, and bleeding anaemia between 2010 and 2015 were analysed.

RESULTS: Data were available from 50 196 female and 31 308 male patients. Among these, 892 patients had 987 hospitalisations with bleeding events. The most frequent bleeding cases were gastrointestinal bleedings with 588 events (59.6%), followed by cerebral haemorrhage with 344 (34.8%), and bleeding anaemia with 55 events (5.6%), respectively. The risk of bleeding events was similar between SSRI and other ADTx, when combined with oral anticoagulants (p = 0.51). Concomitant treatment of patients with SSRI or other ADTx and NOAC was associated with an increased bleeding risk compared with cotreatment with VKA (1.21, 95% CI: 1.05-1.40; p = 0.0097).

CONCLUSION: Co-medication of SSRI with VKA or NOAC has little if any impact on hospital discharge diagnoses for bleeding events compared with cotreatment of those anticoagulants with other antidepressant medications.

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