diff --git a/backend/app.py b/backend/app.py
index 8a3ffbe..85a7d1d 100644
--- a/backend/app.py
+++ b/backend/app.py
@@ -3953,6 +3953,198 @@ def api_conversion_factor(sung_code):
         })
 
 
+@app.route('/api/drug-info/drysyrup/<sung_code>', methods=['GET'])
+def api_drysyrup_get(sung_code):
+    """
+    건조시럽 전체 정보 조회 API
+    
+    PostgreSQL drysyrup 테이블에서 SUNG_CODE로 전체 정보 조회
+    """
+    try:
+        session = db_manager.get_postgres_session()
+        if session is None:
+            return jsonify({
+                'success': True,
+                'exists': False,
+                'error': 'PostgreSQL 연결 실패'
+            })
+        
+        query = text("""
+            SELECT 
+                ingredient_code,
+                ingredient_name,
+                product_name,
+                conversion_factor,
+                post_prep_amount,
+                main_ingredient_amt,
+                storage_conditions,
+                expiration_date
+            FROM drysyrup
+            WHERE ingredient_code = :sung_code
+            LIMIT 1
+        """)
+        row = session.execute(query, {'sung_code': sung_code}).fetchone()
+        
+        if not row:
+            return jsonify({
+                'success': True,
+                'exists': False
+            })
+        
+        return jsonify({
+            'success': True,
+            'exists': True,
+            'sung_code': row[0],
+            'ingredient_name': row[1],
+            'product_name': row[2],
+            'conversion_factor': float(row[3]) if row[3] is not None else None,
+            'post_prep_amount': row[4],
+            'main_ingredient_amt': row[5],
+            'storage_conditions': row[6],
+            'expiration_date': row[7]
+        })
+        
+    except Exception as e:
+        logging.error(f"건조시럽 조회 오류 (SUNG_CODE={sung_code}): {e}")
+        return jsonify({
+            'success': True,
+            'exists': False,
+            'error': str(e)
+        })
+
+
+@app.route('/api/drug-info/drysyrup', methods=['POST'])
+def api_drysyrup_create():
+    """
+    건조시럽 신규 등록 API
+    """
+    try:
+        data = request.get_json()
+        if not data or not data.get('sung_code'):
+            return jsonify({'success': False, 'error': '성분코드 필수'}), 400
+        
+        session = db_manager.get_postgres_session()
+        if session is None:
+            return jsonify({'success': False, 'error': 'PostgreSQL 연결 실패'}), 500
+        
+        # 중복 체크
+        check_query = text("SELECT 1 FROM drysyrup WHERE ingredient_code = :sung_code")
+        existing = session.execute(check_query, {'sung_code': data['sung_code']}).fetchone()
+        if existing:
+            return jsonify({'success': False, 'error': '이미 등록된 성분코드'}), 400
+        
+        insert_query = text("""
+            INSERT INTO drysyrup (
+                ingredient_code, ingredient_name, product_name,
+                conversion_factor, post_prep_amount, main_ingredient_amt,
+                storage_conditions, expiration_date
+            ) VALUES (
+                :sung_code, :ingredient_name, :product_name,
+                :conversion_factor, :post_prep_amount, :main_ingredient_amt,
+                :storage_conditions, :expiration_date
+            )
+        """)
+        
+        session.execute(insert_query, {
+            'sung_code': data.get('sung_code'),
+            'ingredient_name': data.get('ingredient_name', ''),
+            'product_name': data.get('product_name', ''),
+            'conversion_factor': data.get('conversion_factor'),
+            'post_prep_amount': data.get('post_prep_amount', ''),
+            'main_ingredient_amt': data.get('main_ingredient_amt', ''),
+            'storage_conditions': data.get('storage_conditions', '실온'),
+            'expiration_date': data.get('expiration_date', '')
+        })
+        session.commit()
+        
+        return jsonify({'success': True, 'message': '등록 완료'})
+        
+    except Exception as e:
+        logging.error(f"건조시럽 등록 오류: {e}")
+        try:
+            session.rollback()
+        except:
+            pass
+        return jsonify({'success': False, 'error': str(e)}), 500
+
+
+@app.route('/api/drug-info/drysyrup/<sung_code>', methods=['PUT'])
+def api_drysyrup_update(sung_code):
+    """
+    건조시럽 정보 수정 API
+    """
+    try:
+        data = request.get_json()
+        if not data:
+            return jsonify({'success': False, 'error': '데이터 필수'}), 400
+        
+        session = db_manager.get_postgres_session()
+        if session is None:
+            return jsonify({'success': False, 'error': 'PostgreSQL 연결 실패'}), 500
+        
+        # 존재 여부 확인
+        check_query = text("SELECT 1 FROM drysyrup WHERE ingredient_code = :sung_code")
+        existing = session.execute(check_query, {'sung_code': sung_code}).fetchone()
+        
+        if not existing:
+            # 없으면 신규 등록으로 처리
+            insert_query = text("""
+                INSERT INTO drysyrup (
+                    ingredient_code, ingredient_name, product_name,
+                    conversion_factor, post_prep_amount, main_ingredient_amt,
+                    storage_conditions, expiration_date
+                ) VALUES (
+                    :sung_code, :ingredient_name, :product_name,
+                    :conversion_factor, :post_prep_amount, :main_ingredient_amt,
+                    :storage_conditions, :expiration_date
+                )
+            """)
+            session.execute(insert_query, {
+                'sung_code': sung_code,
+                'ingredient_name': data.get('ingredient_name', ''),
+                'product_name': data.get('product_name', ''),
+                'conversion_factor': data.get('conversion_factor'),
+                'post_prep_amount': data.get('post_prep_amount', ''),
+                'main_ingredient_amt': data.get('main_ingredient_amt', ''),
+                'storage_conditions': data.get('storage_conditions', '실온'),
+                'expiration_date': data.get('expiration_date', '')
+            })
+        else:
+            # 있으면 업데이트
+            update_query = text("""
+                UPDATE drysyrup SET
+                    ingredient_name = :ingredient_name,
+                    product_name = :product_name,
+                    conversion_factor = :conversion_factor,
+                    post_prep_amount = :post_prep_amount,
+                    main_ingredient_amt = :main_ingredient_amt,
+                    storage_conditions = :storage_conditions,
+                    expiration_date = :expiration_date
+                WHERE ingredient_code = :sung_code
+            """)
+            session.execute(update_query, {
+                'sung_code': sung_code,
+                'ingredient_name': data.get('ingredient_name', ''),
+                'product_name': data.get('product_name', ''),
+                'conversion_factor': data.get('conversion_factor'),
+                'post_prep_amount': data.get('post_prep_amount', ''),
+                'main_ingredient_amt': data.get('main_ingredient_amt', ''),
+                'storage_conditions': data.get('storage_conditions', '실온'),
+                'expiration_date': data.get('expiration_date', '')
+            })
+        
+        session.commit()
+        return jsonify({'success': True, 'message': '저장 완료'})
+        
+    except Exception as e:
+        logging.error(f"건조시럽 수정 오류 (SUNG_CODE={sung_code}): {e}")
+        try:
+            session.rollback()
+        except:
+            pass
+        return jsonify({'success': False, 'error': str(e)}), 500
+
+
 # ==================== 입고이력 API ====================
 
 @app.route('/api/drugs/<drug_code>/purchase-history')
diff --git a/backend/templates/partials/drysyrup_modal.html b/backend/templates/partials/drysyrup_modal.html
new file mode 100644
index 0000000..77966a9
--- /dev/null
+++ b/backend/templates/partials/drysyrup_modal.html
@@ -0,0 +1,56 @@
+<!-- 건조시럽 환산계수 모달 -->
+<div id="drysyrupModal" class="drysyrup-modal">
+    <div class="drysyrup-modal-content">
+        <div class="drysyrup-modal-header">
+            <h3>🧪 건조시럽 환산계수</h3>
+            <button class="drysyrup-modal-close" onclick="closeDrysyrupModal()">&times;</button>
+        </div>
+        <div class="drysyrup-modal-body">
+            <div class="drysyrup-form">
+                <div class="drysyrup-form-row">
+                    <label>성분코드</label>
+                    <input type="text" id="drysyrup_sung_code" readonly class="readonly">
+                </div>
+                <div class="drysyrup-form-row">
+                    <label>성분명</label>
+                    <input type="text" id="drysyrup_ingredient_name" placeholder="예: 아목시실린">
+                </div>
+                <div class="drysyrup-form-row">
+                    <label>제품명</label>
+                    <input type="text" id="drysyrup_product_name" placeholder="예: 오구멘틴듀오시럽">
+                </div>
+                <div class="drysyrup-form-row">
+                    <label>환산계수 (g/ml)</label>
+                    <input type="number" id="drysyrup_conversion_factor" step="0.001" placeholder="예: 0.11">
+                    <span class="hint">ml × 환산계수 = g</span>
+                </div>
+                <div class="drysyrup-form-row">
+                    <label>조제 후 함량</label>
+                    <input type="text" id="drysyrup_post_prep_amount" placeholder="예: 4.8mg/ml">
+                </div>
+                <div class="drysyrup-form-row">
+                    <label>분말 중 주성분량</label>
+                    <input type="text" id="drysyrup_main_ingredient_amt" placeholder="예: 0.787g/100g">
+                </div>
+                <div class="drysyrup-form-row">
+                    <label>보관조건</label>
+                    <select id="drysyrup_storage_conditions">
+                        <option value="실온">실온</option>
+                        <option value="냉장">냉장</option>
+                    </select>
+                </div>
+                <div class="drysyrup-form-row">
+                    <label>조제 후 유효기간</label>
+                    <input type="text" id="drysyrup_expiration_date" placeholder="예: 15일">
+                </div>
+            </div>
+        </div>
+        <div class="drysyrup-modal-footer">
+            <span id="drysyrup_status" class="status-text"></span>
+            <div class="button-group">
+                <button class="btn-cancel" onclick="closeDrysyrupModal()">취소</button>
+                <button class="btn-save" onclick="saveDrysyrup()">💾 저장</button>
+            </div>
+        </div>
+    </div>
+</div>
diff --git a/backend/templates/pmr.html b/backend/templates/pmr.html
index 3aa93bb..8bd5b0a 100644
--- a/backend/templates/pmr.html
+++ b/backend/templates/pmr.html
@@ -1226,6 +1226,133 @@
             align-items: center;
             gap: 4px;
         }
+        
+        /* 건조시럽 환산계수 모달 */
+        .drysyrup-modal {
+            display: none;
+            position: fixed;
+            top: 0; left: 0; right: 0; bottom: 0;
+            background: rgba(0,0,0,0.6);
+            z-index: 1100;
+            overflow-y: auto;
+        }
+        .drysyrup-modal.show { display: flex; justify-content: center; align-items: flex-start; padding: 40px 20px; }
+        .drysyrup-modal-content {
+            width: 100%;
+            max-width: 500px;
+            background: #fff;
+            border-radius: 16px;
+            box-shadow: 0 20px 60px rgba(0,0,0,0.3);
+            overflow: hidden;
+        }
+        .drysyrup-modal-header {
+            background: linear-gradient(135deg, #10b981, #059669);
+            color: #fff;
+            padding: 18px 25px;
+            display: flex;
+            justify-content: space-between;
+            align-items: center;
+        }
+        .drysyrup-modal-header h3 { margin: 0; font-size: 1.2rem; }
+        .drysyrup-modal-close {
+            background: rgba(255,255,255,0.2);
+            border: none;
+            color: #fff;
+            font-size: 1.5rem;
+            width: 36px;
+            height: 36px;
+            border-radius: 50%;
+            cursor: pointer;
+            transition: background 0.2s;
+        }
+        .drysyrup-modal-close:hover { background: rgba(255,255,255,0.3); }
+        .drysyrup-modal-body { padding: 25px; }
+        .drysyrup-form { display: flex; flex-direction: column; gap: 16px; }
+        .drysyrup-form-row {
+            display: flex;
+            flex-direction: column;
+            gap: 6px;
+        }
+        .drysyrup-form-row label {
+            font-size: 0.85rem;
+            font-weight: 600;
+            color: #374151;
+        }
+        .drysyrup-form-row input,
+        .drysyrup-form-row select {
+            padding: 10px 14px;
+            border: 1px solid #d1d5db;
+            border-radius: 8px;
+            font-size: 0.95rem;
+            transition: border-color 0.2s, box-shadow 0.2s;
+        }
+        .drysyrup-form-row input:focus,
+        .drysyrup-form-row select:focus {
+            outline: none;
+            border-color: #10b981;
+            box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.1);
+        }
+        .drysyrup-form-row input.readonly {
+            background: #f3f4f6;
+            color: #6b7280;
+            cursor: not-allowed;
+        }
+        .drysyrup-form-row .hint {
+            font-size: 0.75rem;
+            color: #9ca3af;
+        }
+        .drysyrup-modal-footer {
+            background: #f9fafb;
+            padding: 16px 25px;
+            border-top: 1px solid #e5e7eb;
+            display: flex;
+            justify-content: space-between;
+            align-items: center;
+        }
+        .drysyrup-modal-footer .status-text {
+            font-size: 0.85rem;
+            color: #6b7280;
+        }
+        .drysyrup-modal-footer .button-group {
+            display: flex;
+            gap: 10px;
+        }
+        .drysyrup-modal-footer .btn-cancel {
+            padding: 10px 20px;
+            background: #e5e7eb;
+            color: #374151;
+            border: none;
+            border-radius: 8px;
+            font-size: 0.9rem;
+            font-weight: 600;
+            cursor: pointer;
+            transition: background 0.2s;
+        }
+        .drysyrup-modal-footer .btn-cancel:hover { background: #d1d5db; }
+        .drysyrup-modal-footer .btn-save {
+            padding: 10px 24px;
+            background: linear-gradient(135deg, #10b981, #059669);
+            color: #fff;
+            border: none;
+            border-radius: 8px;
+            font-size: 0.9rem;
+            font-weight: 600;
+            cursor: pointer;
+            transition: transform 0.2s, box-shadow 0.2s;
+        }
+        .drysyrup-modal-footer .btn-save:hover {
+            transform: translateY(-1px);
+            box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
+        }
+        
+        /* 약품명 더블클릭 힌트 */
+        .med-name[data-sung-code]:not([data-sung-code=""]) {
+            cursor: pointer;
+        }
+        .med-name[data-sung-code]:not([data-sung-code=""]):hover {
+            text-decoration: underline;
+            text-decoration-style: dotted;
+        }
     </style>
 </head>
 <body>
@@ -3278,5 +3405,190 @@
         })();
         
     </script>
+    
+    <!-- 건조시럽 환산계수 모달 -->
+    <div id="drysyrupModal" class="drysyrup-modal">
+        <div class="drysyrup-modal-content">
+            <div class="drysyrup-modal-header">
+                <h3>🧪 건조시럽 환산계수</h3>
+                <button class="drysyrup-modal-close" onclick="closeDrysyrupModal()">&times;</button>
+            </div>
+            <div class="drysyrup-modal-body">
+                <div class="drysyrup-form">
+                    <div class="drysyrup-form-row">
+                        <label>성분코드</label>
+                        <input type="text" id="drysyrup_sung_code" readonly class="readonly">
+                    </div>
+                    <div class="drysyrup-form-row">
+                        <label>성분명</label>
+                        <input type="text" id="drysyrup_ingredient_name" placeholder="예: 아목시실린">
+                    </div>
+                    <div class="drysyrup-form-row">
+                        <label>제품명</label>
+                        <input type="text" id="drysyrup_product_name" placeholder="예: 오구멘틴듀오시럽">
+                    </div>
+                    <div class="drysyrup-form-row">
+                        <label>환산계수 (g/ml)</label>
+                        <input type="number" id="drysyrup_conversion_factor" step="0.001" placeholder="예: 0.11">
+                        <span class="hint">ml × 환산계수 = g</span>
+                    </div>
+                    <div class="drysyrup-form-row">
+                        <label>조제 후 함량</label>
+                        <input type="text" id="drysyrup_post_prep_amount" placeholder="예: 4.8mg/ml">
+                    </div>
+                    <div class="drysyrup-form-row">
+                        <label>분말 중 주성분량</label>
+                        <input type="text" id="drysyrup_main_ingredient_amt" placeholder="예: 0.787g/100g">
+                    </div>
+                    <div class="drysyrup-form-row">
+                        <label>보관조건</label>
+                        <select id="drysyrup_storage_conditions">
+                            <option value="실온">실온</option>
+                            <option value="냉장">냉장</option>
+                        </select>
+                    </div>
+                    <div class="drysyrup-form-row">
+                        <label>조제 후 유효기간</label>
+                        <input type="text" id="drysyrup_expiration_date" placeholder="예: 15일">
+                    </div>
+                </div>
+            </div>
+            <div class="drysyrup-modal-footer">
+                <span id="drysyrup_status" class="status-text"></span>
+                <div class="button-group">
+                    <button class="btn-cancel" onclick="closeDrysyrupModal()">취소</button>
+                    <button class="btn-save" onclick="saveDrysyrup()">💾 저장</button>
+                </div>
+            </div>
+        </div>
+    </div>
+    
+    <script>
+        // ==================== 건조시럽 환산계수 모달 ====================
+        let drysyrupIsNew = false;
+        
+        // 약품명 더블클릭 이벤트 등록
+        document.addEventListener('DOMContentLoaded', function() {
+            // 동적으로 생성되는 요소를 위해 이벤트 위임 사용
+            document.addEventListener('dblclick', function(e) {
+                // 약품 행(tr)에서 더블클릭 감지
+                const row = e.target.closest('tr[data-sung-code]');
+                if (row) {
+                    const sungCode = row.dataset.sungCode;
+                    const medName = row.dataset.medName || '';
+                    if (sungCode) {
+                        openDrysyrupModal(sungCode, medName);
+                    }
+                }
+            });
+        });
+        
+        // 모달 열기
+        async function openDrysyrupModal(sungCode, medName) {
+            const modal = document.getElementById('drysyrupModal');
+            const statusEl = document.getElementById('drysyrup_status');
+            
+            // 폼 초기화
+            document.getElementById('drysyrup_sung_code').value = sungCode;
+            document.getElementById('drysyrup_ingredient_name').value = '';
+            document.getElementById('drysyrup_product_name').value = medName || '';
+            document.getElementById('drysyrup_conversion_factor').value = '';
+            document.getElementById('drysyrup_post_prep_amount').value = '';
+            document.getElementById('drysyrup_main_ingredient_amt').value = '';
+            document.getElementById('drysyrup_storage_conditions').value = '실온';
+            document.getElementById('drysyrup_expiration_date').value = '';
+            statusEl.textContent = '로딩 중...';
+            
+            modal.classList.add('show');
+            
+            // API 호출
+            try {
+                const resp = await fetch('/api/drug-info/drysyrup/' + encodeURIComponent(sungCode));
+                const data = await resp.json();
+                
+                if (data.exists) {
+                    // 기존 데이터 채우기
+                    document.getElementById('drysyrup_ingredient_name').value = data.ingredient_name || '';
+                    document.getElementById('drysyrup_product_name').value = data.product_name || '';
+                    document.getElementById('drysyrup_conversion_factor').value = data.conversion_factor || '';
+                    document.getElementById('drysyrup_post_prep_amount').value = data.post_prep_amount || '';
+                    document.getElementById('drysyrup_main_ingredient_amt').value = data.main_ingredient_amt || '';
+                    document.getElementById('drysyrup_storage_conditions').value = data.storage_conditions || '실온';
+                    document.getElementById('drysyrup_expiration_date').value = data.expiration_date || '';
+                    statusEl.textContent = '✅ 등록된 데이터';
+                    drysyrupIsNew = false;
+                } else {
+                    statusEl.textContent = '🆕 신규 등록';
+                    drysyrupIsNew = true;
+                }
+            } catch (err) {
+                console.error('드라이시럽 조회 오류:', err);
+                statusEl.textContent = '⚠️ 조회 실패 (신규 등록 가능)';
+                drysyrupIsNew = true;
+            }
+        }
+        
+        // 모달 닫기
+        function closeDrysyrupModal() {
+            document.getElementById('drysyrupModal').classList.remove('show');
+        }
+        
+        // 저장
+        async function saveDrysyrup() {
+            const sungCode = document.getElementById('drysyrup_sung_code').value;
+            const statusEl = document.getElementById('drysyrup_status');
+            
+            const data = {
+                sung_code: sungCode,
+                ingredient_name: document.getElementById('drysyrup_ingredient_name').value,
+                product_name: document.getElementById('drysyrup_product_name').value,
+                conversion_factor: parseFloat(document.getElementById('drysyrup_conversion_factor').value) || null,
+                post_prep_amount: document.getElementById('drysyrup_post_prep_amount').value,
+                main_ingredient_amt: document.getElementById('drysyrup_main_ingredient_amt').value,
+                storage_conditions: document.getElementById('drysyrup_storage_conditions').value,
+                expiration_date: document.getElementById('drysyrup_expiration_date').value
+            };
+            
+            statusEl.textContent = '저장 중...';
+            
+            try {
+                const url = drysyrupIsNew ? '/api/drug-info/drysyrup' : '/api/drug-info/drysyrup/' + encodeURIComponent(sungCode);
+                const method = drysyrupIsNew ? 'POST' : 'PUT';
+                
+                const resp = await fetch(url, {
+                    method: method,
+                    headers: { 'Content-Type': 'application/json' },
+                    body: JSON.stringify(data)
+                });
+                
+                const result = await resp.json();
+                
+                if (result.success) {
+                    statusEl.textContent = '✅ 저장 완료!';
+                    window.showToast && window.showToast('환산계수 저장 완료', 'success');
+                    setTimeout(closeDrysyrupModal, 1000);
+                } else {
+                    statusEl.textContent = '❌ ' + (result.error || '저장 실패');
+                }
+            } catch (err) {
+                console.error('드라이시럽 저장 오류:', err);
+                statusEl.textContent = '❌ 저장 오류';
+            }
+        }
+        
+        // ESC 키로 모달 닫기
+        document.addEventListener('keydown', function(e) {
+            if (e.key === 'Escape') {
+                closeDrysyrupModal();
+            }
+        });
+        
+        // 모달 바깥 클릭시 닫기
+        document.getElementById('drysyrupModal').addEventListener('click', function(e) {
+            if (e.target === this) {
+                closeDrysyrupModal();
+            }
+        });
+    </script>
 </body>
 </html>