What is "oronamin"

, produced by Otsuka Chemical Holdings Co., Ltd., (distributed and sold by Otsuka Pharmaceutical Co.) is a carbonated beverage available in Japan. It is commonly called Oronamin C or Oronamin. Its name is similar to the Takeda Pharmaceutical Co. product "Arinamin" and its name comes from Otsuka's own and its main ingredient, vitamin C. Oronamin C was named after the Oronine H Ointment in hopes that it would prove to be equally successful.