diff --git a/openhis-server-new/openhis-application/src/main/java/com/openhis/web/inpatient/mapper/InpatientDrugMapper.java b/openhis-server-new/openhis-application/src/main/java/com/openhis/web/inpatient/mapper/InpatientDrugMapper.java
index 75a15aa35..997939a79 100644
--- a/openhis-server-new/openhis-application/src/main/java/com/openhis/web/inpatient/mapper/InpatientDrugMapper.java
+++ b/openhis-server-new/openhis-application/src/main/java/com/openhis/web/inpatient/mapper/InpatientDrugMapper.java
@@ -52,31 +52,27 @@ public interface InpatientDrugMapper {
                                @Param("operator") String operator);
 
     /**
-     * 汇总发药/退药数量（UPSERT）。
+     * 汇总单 UPSERT：累计药品发放/退药数量
      *
-     * 表结构示例（仅供参考）：
+     * 表结构（示例）：
      *   inpatient_drug_dispense_summary
-     *   - id (PK, 自增)
-     *   - order_id
-     *   - drug_id
-     *   - total_quantity (累计正负数量)
-     *   - last_update_time
+     *   - order_id   BIGINT
+     *   - drug_id    BIGINT
+     *   - total_quantity INT   // 正负累计
+     *   - update_time DATETIME
      *
-     * 该 SQL 在不存在对应汇总记录时 INSERT，存在时 UPDATE total_quantity。
+     * 主键 (order_id, drug_id) 用于 ON DUPLICATE KEY UPDATE。
      *
      * @param orderId   医嘱ID
      * @param drugId    药品ID
-     * @param quantity  本次操作的数量（正数为发药，负数为退药）
+     * @param quantity  本次发药或退药数量（正负均可）
      */
-    @Insert({
-        "<script>",
-        "INSERT INTO inpatient_drug_dispense_summary (order_id, drug_id, total_quantity, last_update_time) ",
-        "VALUES (#{orderId}, #{drugId}, #{quantity}, NOW()) ",
-        "ON DUPLICATE KEY UPDATE ",
-        "total_quantity = total_quantity + #{quantity}, ",
-        "last_update_time = NOW()",
-        "</script>"
-    })
+    @Insert("INSERT INTO inpatient_drug_dispense_summary " +
+            "(order_id, drug_id, total_quantity, update_time) " +
+            "VALUES (#{orderId}, #{drugId}, #{quantity}, NOW()) " +
+            "ON DUPLICATE KEY UPDATE " +
+            "total_quantity = total_quantity + VALUES(total_quantity), " +
+            "update_time = NOW()")
     int upsertDrugDispenseSummary(@Param("orderId") Long orderId,
                                   @Param("drugId") Long drugId,
                                   @Param("quantity") Integer quantity);
diff --git a/openhis-server-new/openhis-application/src/main/java/com/openhis/web/inpatient/service/impl/InpatientDrugServiceImpl.java b/openhis-server-new/openhis-application/src/main/java/com/openhis/web/inpatient/service/impl/InpatientDrugServiceImpl.java
index 040bcaa05..78f0d9fac 100644
--- a/openhis-server-new/openhis-application/src/main/java/com/openhis/web/inpatient/service/impl/InpatientDrugServiceImpl.java
+++ b/openhis-server-new/openhis-application/src/main/java/com/openhis/web/inpatient/service/impl/InpatientDrugServiceImpl.java
@@ -50,16 +50,16 @@ public class InpatientDrugServiceImpl implements InpatientDrugService {
             Integer quantity = (Integer) drug.get("quantity");
             String operator = (String) drug.get("operator");
 
-            // 明细记录（正向数量）
+            // 插入明细（正向数量）
             drugMapper.insertDrugDispenseDetail(orderId, drugId, quantity, operator);
 
-            // 汇总单累计（正向数量）
+            // 更新/插入汇总单（正向累计）
             drugMapper.upsertDrugDispenseSummary(orderId, drugId, quantity);
         }
     }
 
     /**
-     * 退药（数量为负数，业务同样先写明细后更新汇总）
+     * 退药（数量为负数）
      *
      * @param orderId   医嘱主键
      * @param drugList  每种药品的退药信息，键包括 drugId、quantity（正数表示退药量）、operator 等
@@ -69,14 +69,14 @@ public class InpatientDrugServiceImpl implements InpatientDrugService {
     public void returnDrugs(Long orderId, List<Map<String, Object>> drugList) {
         for (Map<String, Object> drug : drugList) {
             Long drugId = (Long) drug.get("drugId");
-            Integer quantity = (Integer) drug.get("quantity"); // 正数表示退药量
+            Integer quantity = (Integer) drug.get("quantity"); // 正数
             String operator = (String) drug.get("operator");
 
-            // 退药明细使用负数保存
+            // 退药数量以负数保存到明细表
             int negativeQty = -Math.abs(quantity);
             drugMapper.insertDrugReturnDetail(orderId, drugId, negativeQty, operator);
 
-            // 汇总单累计负数
+            // 汇总单同样使用负数累计
             drugMapper.upsertDrugDispenseSummary(orderId, drugId, negativeQty);
         }
     }