Which of the following would be an appropriate treatment for acute cystitis?

The appropriate treatment for acute cystitis, particularly in a pediatric population, is a 7-10 day course of antibiotics. Acute cystitis, a common urinary tract infection (UTI), typically results from bacterial infection of the bladder. The use of antibiotics effectively addresses the underlying infection, alleviating symptoms such as dysuria, frequency, and urgency. The duration of treatment is crucial, as a 7-10 day regimen is usually recommended to ensure complete resolution of the infection and to prevent recurrence.

Other options do not directly address the bacterial infection causing acute cystitis. High-dose ibuprofen may help alleviate discomfort and reduce inflammation associated with the UTI but does not treat the infection itself. Intravenous fluids would be indicated in cases of significant dehydration or complications from the infection but are not a routine treatment for uncomplicated acute cystitis. Inhaled steroids are primarily used for respiratory conditions such as asthma and do not have any role in treating urinary tract infections.