《Table 2 Components of DXR (Capsule ingredients)》

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《定心方联合胺碘酮治疗室性早搏:一项随机、双盲、多中心、安慰剂对照试验（英文）》

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All herbs for DXR were purchased from the Affiliated Nanfang Hospital of Southern Medical University and were available over-the-counter throughout China.No product used in this trial was an animal product，endangered species or controlled substance.All herbs were administered in the dried powdered form and encapsulated.The dried powdered DXR was prepared by the principal supplier，YiJia Pharmaceutical Company，Guangzhou，China（Table 2）.The DXR placebo was indistinguishable from the DXR in form，color，smell，taste，size and packaging after testing on10 independent volunteers.DXR and the placebo formulation were supplied in the same opaque capsules.The principal supplier was also contracted to pack the drug（amiodarone 200 mg tablets）and matching placebo tablets.Patients in the DXR group and the DCA group were required to take 5 capsules twice per day for 8 weeks.The dose of amiodarone or amiodarone placebo was 600 mg/day orally in three divided daily doses for 2 week，then 400 mg/day orally in two divided daily doses for 4 weeks followed by a maintenance oral dose of 200 mg/day for 2 week.Compliance was assessed by pill count.