My husband was on 500 mg. apo-amoxi 3x daily for 10 days for a bronchial infection after the flu. It is now 2 weeks after the last pill was taken and since the cessation of these pills he has been itchy all over. just recently he had a rash on his stomach(red) . He is now taking benadryl but was is going on. Is the medication still within his systom and whom should he see to cure this? thanks for any/all responses in advance.