 [ Symptoms ] i have a rx for omnicef that i have have since 413 is it still good to use for sore throat swollen tonsils stuffy nose [ Disease ] most sore throats are viral especially when sore throats are accompanying a stuffy nose you most likely have a bad cold and may not need a self prescribed antibiotic at all i am not a big fan of people randomly taking leftover and expired antibiotics as you can see