i would not recommend giving any benadryl at this time for the itchy feet. if your son was allergic to amoxicillin he would have developed a rash all over his body and it usually happens right after the first or second dose. i would recommend using a moisturizing cream on his feet to help keep the skin on his feet moist and may also help with the itching.
my 3 1/2-year-old has strep and is taking amoxicillin. can i give him benadryl to take for itchy feet?