For the IV solution, the usual dose of ciprofloxacin is 6 mg to 10 mg per kg of body weight (about 2.7 mg to 4.5 mg per pound) every eight hours. The maximum oral dose in children is 750 mg per dose, and the maximum IV dose is 400 mg per dose. Treatment usually continues for 10 to 21 days.The usual dose of ciprofloxacin for treating anthrax exposure in children is 15 mg per kg of body weight (about 6.8 mg per pound) every 12 hours for oral ciprofloxacin and 10 mg per kg (about 4.5 mg per pound) every 12 hours for the IV solution.he maximum oral dose is 500 mg per dose, and the maximum IV dose is 400 mg per dose. The length of treatment is 60 days. Dosing of ciprofloxacin ear and eye products will be similar for adults and children.