The words “Teck Heng Yoo” which have been well known among Thai people for a long time, form Osotspa’s original name. Teck Heng Yoo was a small pharmacy located in the Sampeng area of Bangkok. The pharmacy was founded by Mr. Pae, who sold an ancient Chinese medicine called "Krisnaklan Trakilane" that effectively cured stomach aches and diarrhea.

"Krisnaklan Trakilane"was provided to His Majesty King Vajiravudh,Rama VI, to help clear up diarrhea in his Thai army units known as the

"Wild Tiger Corps"
during military exercises in Nakhon Pathom.