Is it safe to give a 5 year old who weighs 34 lbs, 4mg of Zofran?

Is your child on Chemo?

This is what I found on the web:

Children 12 years and older: The usual dose is 8 mg taken twice a day. The first dose should be given 30 minutes before the start of chemotherapy, with the second dose 8 hours after the first dose. Then, 8 mg is taken every 12 hours for 1 to 2 days after completion of chemotherapy.

Children 4 to 11 years old: The usual dose is 4 mg given 3 times a day. The first dose should be given 30 minutes before the start of emetogenic chemotherapy, with additional doses 4 and 8 hours after the first dose. Also, 4 mg may be given 3 times a day (every 8 hours) for 1 to 2 days after completion of chemotherapy.

It is always best to let the child's doctor know that this is what you are going to do.

Best Wishes.