Cephalexin for Oral Suspension USP is administered orally.Adults—The adult dosage ranges from 1 to 4 g daily in divided doses.The usual adult dose is 250 mg every 6 hours. For the following infections, a dosage of 500 mg may be administered every 12 hours: streptococcal pharyngitis, skin and skin structure infections, and uncomplicated cystitis in patients over 15 years of age. Cystitis therapy should be continued for 7 to 14 days. For more severe infections or those caused by less susceptible organisms, larger doses may be needed. If daily doses of Cephalexin for Oral Suspension greater than 4 g are required, parenteral cephalosporins, in appropriate doses, should be considered.Pediatric Patients—The usual recommended daily dosage for pediatric patients is 25 to 50 mg/kg in divided doses. For streptococcal pharyngitis in patients over 1 year of age and for skin and skin structure infections, the total daily dose may be divided and administered every 12 hours. Cephalexin for Oral Suspension Weight 125 mg/5 mL 10 kg (22 lb) 1/2 to 1 tsp q.i.d. 20 kg (44 lb) 1 to 2 tsp q.i.d. 40 kg (88 lb) 2 to 4 tsp q.i.d. Weight 250 mg/5 mL 10 kg (22 lb) 1/4 to 1/2 tsp q.i.d. 20 kg (44 lb) 1/2 to 1 tsp q.i.d. 40 kg (88 lb) 1 to 2 tsp q.i.d. or Weight 125 mg/5 mL 10 kg (22 lb) 1 to 2 tsp b.i.d. 20 kg (44 lb) 2 to 4 tsp b.i.d. 40 kg (88 lb) 4 to 8 tsp b.i.d. Weight 250 mg/5 mL 10 kg (22 lb) 1/2 to 1 tsp b.i.d. 20 kg (44 lb) 1 to 2 tsp b.i.d. 40 kg (88 lb) 2 to 4 tsp b.i.d.In severe infections, the dosage may be doubled.In the therapy of otitis media, clinical studies have shown that a dosage of 75 to 100 mg/kg/day in 4 divided doses is required.In the treatment of ß-hemolytic streptococcal infections, a therapeutic dosage of cephalexin should be administered for at least 10 days.