Hello. Thanks for writing in. Unfortunately, there isn't an injectible medication for coccidiosis. They need to be treated with a sulfa based antibiotic. There are no injectible forms for these. Albon is most commonly used. It comes in an oral liquid or an oral tablet (usually for medium size or large dogs). Please let me know if you have any other questions. Hope this helps.
Cat Veterinarian
7 years of clinical veterinary medicine and 17 years experience caring for household pets.