Hi, my 14 year old son has this evening developed a rash, im worried that it might be the shingles, he has already had the chickenpox twice in his life, once when he was about 2 years od, and the second time was when he was 12 years old, he is presently taking an antibiotic for a sore throat, should I continue to give this to him??? an is there any advice you can give me in relation to this Thank You