Antithrombotic effects of hydroxychloroquine in a pregnant patient with Antiphospholipid syndrome and recurrent venous thromboembolism.

A pregnant woman with antiphospholipid syndrome presented with repeated venous thromboembolism (VTE) in the first and second trimesters of pregnancy despite receiving combination therapy with low-molecular-weight heparin and aspirin. The addition of hydroxychloroquine prevented further VTE recurrence, thus demonstrating its potential antithrombotic effects.