The dose of sparfloxacin varies depending on the patient, but a common dosage for adults is 400 milligrams on the first day to treat infections, then 200 milligrams for an additional nine days, explains Mayo Clinic. A doctor must determine the dosage for children under 18 years old.
To avoid the side effects of sparfloxacin, doctors recommend patients drink plenty of fluids, according to Mayo Clinic. It is also advisable to take this medication at the same time each day to maintain a constant level of medication in the body. If a dose is missed, a patient needs to take the dose as soon as possible, unless it is close to the time for the next dose.