Senosiain began in 1915, as a pharmacy in Mexico City, known back then as Farmacia Santa Ana. It set out to guarantee an exact following of the formulas prescribed by doctors. This philosophy led the pharmacy to evolve in 1928, into the current Senosiain Laboratories. That same year, the company launched its first industrially manufactured product: the glycerin suppository, which is still considered the ultimate leader of its niche.