diff --git a/openhis-ui-vue3/src/views/inpatientDoctor/home/components/order/index.vue b/openhis-ui-vue3/src/views/inpatientDoctor/home/components/order/index.vue
index 27491ed6c..ef47a8e7d 100755
--- a/openhis-ui-vue3/src/views/inpatientDoctor/home/components/order/index.vue
+++ b/openhis-ui-vue3/src/views/inpatientDoctor/home/components/order/index.vue
@@ -1571,17 +1571,21 @@ function handleSaveGroup(orderGroupList) {
     // 🔥 新版组件已经预处理了数据，优先使用 mergedDetail
     const mergedDetail = item.mergedDetail || {
       ...(item.orderDetailInfos || {}),
-      adviceName: item.orderDetailInfos?.adviceName || item.orderDefinitionName || '未知项目',
+      adviceName: item.orderDefinitionName || item.orderDetailInfos?.adviceName || '未知项目',
       adviceType: item.orderDetailInfos?.adviceType,
       adviceDefinitionId: item.orderDefinitionId || item.orderDetailInfos?.adviceDefinitionId,
       quantity: item.quantity,
       unitCode: item.unitCode || item.orderDetailInfos?.unitCode,
       unitCodeName: item.unitCodeName,
-      dose: item.dose || item.orderDetailInfos?.dose,
+      // 🔧 Bug #403 修复：dose/doseQuantity/dispensePerDuration 需用 null 检查，
+      // 避免组套中值为 null 时回退到医嘱库的 orderDetailInfos
+      dose: item.dose !== undefined && item.dose !== null ? item.dose : item.orderDetailInfos?.dose,
       rateCode: item.rateCode || item.orderDetailInfos?.rateCode,
       methodCode: item.methodCode || item.orderDetailInfos?.methodCode,
-      dispensePerDuration: item.dispensePerDuration || item.orderDetailInfos?.dispensePerDuration,
-      doseQuantity: item.doseQuantity,
+      dispensePerDuration: item.dispensePerDuration !== undefined && item.dispensePerDuration !== null
+        ? item.dispensePerDuration : item.orderDetailInfos?.dispensePerDuration,
+      doseQuantity: item.doseQuantity !== undefined && item.doseQuantity !== null
+        ? item.doseQuantity : item.orderDetailInfos?.doseQuantity,
       inventoryList: item.orderDetailInfos?.inventoryList || [],
       priceList: item.orderDetailInfos?.priceList || [],
       partPercent: item.orderDetailInfos?.partPercent || 1,
@@ -1600,20 +1604,21 @@ function handleSaveGroup(orderGroupList) {
     setValue(mergedDetail);
 
     // 创建新的处方项目
+    // 🔧 Bug #403 修复：关键字段使用 null-safe 回退到 mergedDetail（已由 setValue 填充完整数据）
     const newRow = {
       ...prescriptionList.value[rowIndex.value],
       patientId: patientInfo.value.patientId,
       encounterId: patientInfo.value.encounterId,
       accountId: accountId.value,
-      quantity: item.quantity,
-      methodCode: item.methodCode,
-      rateCode: item.rateCode,
-      dispensePerDuration: item.dispensePerDuration,
-      dose: item.dose,
-      doseQuantity: item.doseQuantity,
+      quantity: item.quantity ?? mergedDetail.quantity,
+      methodCode: item.methodCode ?? mergedDetail.methodCode,
+      rateCode: item.rateCode ?? mergedDetail.rateCode,
+      dispensePerDuration: item.dispensePerDuration ?? mergedDetail.dispensePerDuration,
+      dose: item.dose ?? mergedDetail.dose,
+      doseQuantity: item.doseQuantity ?? mergedDetail.doseQuantity,
       executeNum: 1,
-      unitCode: item.unitCode,
-      unitCode_dictText: item.unitCodeName || '',
+      unitCode: item.unitCode ?? mergedDetail.unitCode,
+      unitCode_dictText: item.unitCodeName || mergedDetail.unitCodeName || '',
       statusEnum: 1,
       orgId: resolveOrgId(item.orderDetailInfos?.orgId || mergedDetail.orgId || patientInfo.value?.inHospitalOrgId) || '',
       // 🔧 修复：同时保存 orgName，确保树匹配不到时仍有中文名称可显示