Fenchem Timicosin is a macrolide antibiotic derived form tylosin, but possessing better efficiency, for use in poultry, swine and cattle. Two forms of Timicosin are available: Timicosin-Base is the synthetic product of Timicosin and 3,5-dimethyl-piperidine, while Timicosin-Phosphate is the synthetic product of phosphoric acid, water and Timicosin.