Throat, Skin, and Urinary Tract Infections
The usual adult dosage is 500 milligrams taken every 12 hours. Cystitis (bladder infection) therapy should be continued for 7 to 14 days.
The usual recommended dosage is 250 milligrams taken every 6 hours. For more severe infections, larger doses may be needed, as determined by your doctor.
CHILDREN UNDER 15 YEARS OLD
The usual dose is 25 to 50 milligrams for each 2.2 pounds of body weight per day, divided into smaller doses.
For strep throat in children over 1 year of age and for skin infections, the dose may be divided into 2 doses taken every 12 hours. For strep infections, the medication should be taken for at least 10 days. Your doctor may double the dose if your child has a severe infection.
For middle ear infection, the dose is 75 to 100 milligrams per 2.2 pounds per day, divided into 4 doses.
Safety and effectiveness have not been established in children.
The dose of cephalexin for adults is 1 to 4 grams in divided doses. Children are treated with 25-100 milligrams/kg/day in divided doses.