diff --git a/src/main/java/com/medicare/neulpeum/domain/entity/ProvidedDrugInfo.java b/src/main/java/com/medicare/neulpeum/domain/entity/ProvidedDrugInfo.java
index 45c6f30..553ae23 100644
--- a/src/main/java/com/medicare/neulpeum/domain/entity/ProvidedDrugInfo.java
+++ b/src/main/java/com/medicare/neulpeum/domain/entity/ProvidedDrugInfo.java
@@ -27,5 +27,5 @@ public class ProvidedDrugInfo {
     private ConsultContentInfo consultId;
 
     @Column(nullable = false)
-    private Long providedAmount;
+    private int providedAmount;
 }
diff --git a/src/main/java/com/medicare/neulpeum/dto/DrugUpdateRequestDto.java b/src/main/java/com/medicare/neulpeum/dto/DrugUpdateRequestDto.java
index 61c9688..b4b8a81 100644
--- a/src/main/java/com/medicare/neulpeum/dto/DrugUpdateRequestDto.java
+++ b/src/main/java/com/medicare/neulpeum/dto/DrugUpdateRequestDto.java
@@ -1,6 +1,5 @@
 package com.medicare.neulpeum.dto;
 
-import com.medicare.neulpeum.domain.entity.ConsultContentInfo;
 import lombok.Getter;
 import lombok.NoArgsConstructor;
 import lombok.Setter;
@@ -9,7 +8,7 @@
 @Setter
 @NoArgsConstructor
 public class DrugUpdateRequestDto {
-    private ConsultContentInfo consultId;
+    private Long consultId;
     private String drugName;
     private int usedAmount;
 
diff --git a/src/main/java/com/medicare/neulpeum/service/ConsultService.java b/src/main/java/com/medicare/neulpeum/service/ConsultService.java
index d5027de..371c3b9 100644
--- a/src/main/java/com/medicare/neulpeum/service/ConsultService.java
+++ b/src/main/java/com/medicare/neulpeum/service/ConsultService.java
@@ -1,7 +1,11 @@
 package com.medicare.neulpeum.service;
 
+import com.medicare.neulpeum.domain.entity.ConsultContentInfo;
 import com.medicare.neulpeum.domain.entity.PatientInfo;
-import com.medicare.neulpeum.dto.*;
+import com.medicare.neulpeum.dto.ConsultDetailResponseDto;
+import com.medicare.neulpeum.dto.ConsultRequestDto;
+import com.medicare.neulpeum.dto.ConsultResponseDto;
+import com.medicare.neulpeum.dto.ConsultUpdateRequestDto;
 
 import java.util.List;
 
@@ -15,4 +19,6 @@ public interface ConsultService {
     void update(ConsultUpdateRequestDto consultUpdateRequestDto);
 
     void delete(Long consultId);
+
+    ConsultContentInfo findById(Long consultId);
 }
diff --git a/src/main/java/com/medicare/neulpeum/service/ConsultServiceImpl.java b/src/main/java/com/medicare/neulpeum/service/ConsultServiceImpl.java
index bc6f761..ea2b075 100644
--- a/src/main/java/com/medicare/neulpeum/service/ConsultServiceImpl.java
+++ b/src/main/java/com/medicare/neulpeum/service/ConsultServiceImpl.java
@@ -116,4 +116,10 @@ public void delete(Long consultId) {
             consultRepository.deleteByConsultId(consultId);
         }
     }
+
+    @Override
+    public ConsultContentInfo findById(Long consultId) {
+        Optional<ConsultContentInfo> consultContentInfoOptional= consultRepository.findById(consultId);
+        return consultContentInfoOptional.orElse(null);
+    }
 }
diff --git a/src/main/java/com/medicare/neulpeum/service/DrugServiceImpl.java b/src/main/java/com/medicare/neulpeum/service/DrugServiceImpl.java
index 0019139..eb48b7d 100644
--- a/src/main/java/com/medicare/neulpeum/service/DrugServiceImpl.java
+++ b/src/main/java/com/medicare/neulpeum/service/DrugServiceImpl.java
@@ -1,10 +1,15 @@
 package com.medicare.neulpeum.service;
 
+import com.medicare.neulpeum.Repository.ConsultRepository;
 import com.medicare.neulpeum.Repository.DrugRepository;
 import com.medicare.neulpeum.Repository.ProvidedDrugRepository;
+import com.medicare.neulpeum.domain.entity.ConsultContentInfo;
 import com.medicare.neulpeum.domain.entity.DrugInfo;
 import com.medicare.neulpeum.domain.entity.ProvidedDrugInfo;
-import com.medicare.neulpeum.dto.*;
+import com.medicare.neulpeum.dto.DrugNameAndAmountResponseDto;
+import com.medicare.neulpeum.dto.DrugRequestDto;
+import com.medicare.neulpeum.dto.DrugResponseDto;
+import com.medicare.neulpeum.dto.DrugUpdateRequestDto;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
@@ -23,6 +28,8 @@ public class DrugServiceImpl implements DrugService{
     DrugRepository drugRepository;
     @Autowired
     ProvidedDrugRepository providedDrugRepository;
+    @Autowired
+    ConsultRepository consultRepository;
 
     @Override
     public void save(DrugRequestDto drugReq) {
@@ -93,6 +100,11 @@ public void updateUsedDrug(List<DrugUpdateRequestDto> drugUpdateRequestDtoList)
             for (DrugUpdateRequestDto updateRequestDto : drugUpdateRequestDtoList) {
                 String drugName = updateRequestDto.getDrugName();
                 int usedAmount = updateRequestDto.getUsedAmount();
+                ConsultContentInfo consultId = consultRepository.findByConsultId(updateRequestDto.getConsultId()).orElse(null);
+                if (consultId == null) {
+                    throw new IllegalArgumentException("상담내역을 찾을 수 없습니다. ID: " + updateRequestDto.getConsultId());
+                }
+
 
                 //약 이름으로 유통기한이 가장 짧은 것을 DB에서 조회
                 List<DrugInfo> drugs = drugRepository.findByDrugNameOrderByExpireDateAsc(drugName);
@@ -105,10 +117,11 @@ public void updateUsedDrug(List<DrugUpdateRequestDto> drugUpdateRequestDtoList)
                         drugRepository.save(drug);
 
                         //ProvidedDrugInfo 테이블에 저장
+
                         ProvidedDrugInfo providedDrugInfo = ProvidedDrugInfo.builder()
                                 .drugId(drug)
-                                .consultId(updateRequestDto.getConsultId())
-                                .providedAmount((long) remainingAmount)
+                                .consultId(consultId)
+                                .providedAmount(remainingAmount)
                                 .build();
                         providedDrugRepository.save(providedDrugInfo);
 
@@ -123,8 +136,8 @@ public void updateUsedDrug(List<DrugUpdateRequestDto> drugUpdateRequestDtoList)
                         //ProvidedDrugInfo 테이블에 저장
                         ProvidedDrugInfo providedDrugInfo = ProvidedDrugInfo.builder()
                                 .drugId(drug)
-                                .consultId(updateRequestDto.getConsultId())
-                                .providedAmount((long) remainingAmount)
+                                .consultId(consultId)
+                                .providedAmount(usableAmount)
                                 .build();
                         providedDrugRepository.save(providedDrugInfo);
                     }