My son, 12 years old, has had a cold and cough for over 2 weeks now and ended up with ear infection. His pediatrician gave him amox, he took for 5 days and got worse. Went back to Dr. and he switched him to omnicef. Been taking for 6 days now with some improvement but today started complaining of pressure in one eye. Could this be due to sinus pressure? I gave him a decongestant about an hour ago and he says it is some better. Thank You