 [ Symptoms ] i have an allergy to amoxicillin can i take cephalexin 500 mg [ Disease ] you need to have her iron checked and get a feeding evaluation start with your pediatrician where they can test her levels and check to see if anything medical is going on such food allergies or reflux if he does not find anything ask for a referral to a feeding therapist for an evaluation this is an important time for feeding and nutrition do not delay getting help to find out what is going on