Abstract:AbstractSeveral case reports have associated the combined use of thyroid drugs and oral anticoagulants, like coumarin, with overanticoagulation. However, this effect has never been described for phenprocoumon, a coumarin derivate that is widely prescribed in continental European countries and in Latin America. We describe a 62-year-old female who had an unexpectedly labile anticoagulation profile when levothyroxine (Puran T4®) was added to her drug therapy regimen, which includ… Show more
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