Chalermwong Udomna (Thai: เฉลิมวงศ์ อุดมนา; formerly Prakob Udomna (ประกอบ อุดมนา)), who boxes as Poonsawat Kratingdaenggym, (พูนสวัสดิ์ กระทิงแดงยิม; born 20 November 1980) is a retired professional boxer from Thailand who fought in the Super bantamweight (also known as Junior featherweight) division.

On 26 September 2009 Poonsawat defeated Irish boxer Bernard Dunne in the 3rd round to claim the WBA World Super Bantamweight title.

[5] Poonsawat was due to fight Guillermo Rigondeaux of Cuba in an attempt to regain the WBA Super Bantamweight title.

However, on December 14, 2012, after Olympic-style drug testing, it was revealed that Poonsawat had failed a medical exam, and would not be able to participate in the bout.

Rumors came about that Poonsawat had tested positive for HIV, but it was later revealed that he suffers from thalassemia, an affliction that affects red blood cells and causes anemia.