| 効果 | 減少 |
| 試験方法 | コホート法 |
| 試験期間 | 1-2 週間 |
| 被験者数 | 40 |
| 性別 | 男女 |
| 年齢 | 30-44, 45-64, 65+ |
| 体型 | 平均 |
この研究の注釈：
In persons with superficial thrombophlebitis given 30mg serrapeptase (10mg thrice daily) relative to the comparator drug Protease S (Seaprose S; no placebo control in this study) noted that both drugs were able to reduce pain and symptoms of thrombophlebitis, but the symptoms alleviation seen with serrapeptase (65%) was outperformed by protease S (85%).