The traditional treatment of strep infections has been a seven-day course of antibiotics, either penicillin or erythromycin  However, since many patients stop taking those drugs within three days, reinfection is common in cases where those drugs are prescribed  A new antibiotic requires only a three-day course of treatment
Ttherefore, reinfection will probably be less common in cases where the new antibiotic is prescribed than in cases where either penicillin or erythromycin is prescribed
A course of treatment with the new antibiotic costs about the same as a course of treatment with either penicillin or erythromycin.