) Tomorrow is a mastitis treatment for dry cows containing cephapirin benzathine. Each 10 ml syringe has 300 mg of cephapirin activity in a stable peanut oil gel. With Aveco ends for partial or full insertion into teat canal. Treatment with Tomorrow is recommended for use during the dry period of any cow known to harbor mastitis organisms. Infuse 1 full syringe into each quarter at the time of drying off. Use no later than 30 days prior to calving. 12 syringes per box.