two months ago, I had a terrible skin allergic reaction on my arms, neck and bottom I went to the dermatologist and he gave me 2 shots and and finally antibiotics (cephalexin 500mg) the skin reaction on my body cleared up, but the redness around my eyes, nose and over my eyelases did not go away. The doctor gave me three creams, but the redness and swelling is still there, it does not itch and does not hurt. dry mouth, fatigue and sore throat begin about 7 days after I was given (cephalexin , I took it for the entire 14 days.