diff --git a/backend/scripts/fill_weight_from_dosage.py b/backend/scripts/fill_weight_from_dosage.py
index 8e6f234..495d896 100644
--- a/backend/scripts/fill_weight_from_dosage.py
+++ b/backend/scripts/fill_weight_from_dosage.py
@@ -246,6 +246,16 @@ def parse_weight_ranges(dosage_instructions):
 
     # ── 패턴8: 라벨 없이 체중 구간만 (반려동물 키워드 있을 때) ──
     if not ranges and ('개' in txt or '고양이' in txt or '반려' in txt or '애완' in txt):
+        # 8a: "Xkg 초과-Ykg 이하" / "Xkg 초과 ~ Ykg" (먼저 처리)
+        for m in re.finditer(
+            r'(\d+\.?\d*)\s*kg\s*초과\s*[-~～]?\s*(\d+\.?\d*)\s*kg(?:\s*(?:이하|까지))?',
+            txt
+        ):
+            wmin, wmax = float(m.group(1)), float(m.group(2))
+            if wmax <= 60 and wmax > wmin:
+                add_range(None, wmin, wmax, None)
+
+        # 8b: "X-Ykg" / "X~Ykg" 일반 범위
         for m in re.finditer(
             r'(?:체중\s*)?(\d+\.?\d*)\s*[-~～]\s*(\d+\.?\d*)\s*kg',
             txt
@@ -254,6 +264,8 @@ def parse_weight_ranges(dosage_instructions):
             if wmax <= 60 and wmax > wmin:
                 add_range(None, wmin, wmax, None)
 
+        # 8c: "Xkg 이하" / "~Xkg" (최소=0)
+        # 단, "Akg 초과-Xkg 이하"는 8a에서 이미 처리되었으므로 제외
         for m in re.finditer(
             r'(?:체중\s*)?[~～]\s*(\d+\.?\d*)\s*kg|(\d+\.?\d*)\s*kg\s*(?:이하|까지)',
             txt
@@ -261,6 +273,11 @@ def parse_weight_ranges(dosage_instructions):
             val = m.group(1) or m.group(2)
             wmax = float(val)
             if wmax <= 60:
+                # "초과-Xkg 이하" 컨텍스트인지 확인 → 이미 8a에서 처리됨
+                start = max(0, m.start() - 15)
+                before = txt[start:m.start()]
+                if '초과' in before:
+                    continue
                 add_range(None, 0, wmax, None)
 
     # 정렬 (min 기준)