 [ Symptoms ] drug allergy my husband was taking anitbiotics prescribed by a dentist for a n infection in a tooth see more below two days after finishing the prescription he developed hives and nausea he did take benedryl for the hives on an empty stomach and the nausea came on after that so i guess that could cause stomach upset but still dont know what caused the hives [ Disease ] hi sore nipples could be your hormones are out of whack see your doctor for a blood test to see how they are your hormones that is good luck