TY - JOUR T1 - HArd-stops for drug interactions—reply AU - Strom BL, Schinnar R, Aberra F, Bilker W, Hennessy S, Leonard CE Y1 - 2011/04/11 N1 - 10.1001/archinternmed.2011.110 JO - Archives of Internal Medicine SP - 702 EP - 710 VL - 171 IS - 7 N2 - Dr Horn is indeed correct that most of the alerts in our study were triggered by warfarin being prescribed to patients who already were receiving trimethoprim-sulfamethoxazole. Some of this was due to warfarin being prescribed 3 times more commonly than trimethoprim-sulfamethoxazole, as noted in our article.1 Dr Horn points out that dose titration of the warfarin might have allowed it to be used safely in patients already receiving trimethoprim-sulfamethoxazole. However, such patients might then be at risk of underanticoagulation when stopping therapy with trimethoprim-sulfamethoxazole, in most cases after being discharged from the hospital. SN - 0003-9926 M3 - doi: 10.1001/archinternmed.2011.110 UR - http://dx.doi.org/10.1001/archinternmed.2011.110 ER -