After iv antibiotics yesterday, tooth abscess swelling gotten worse. should i go back to the er? i'm taking cleocin (clindamycin phosphate) hcl 300mg 3x daily for 7 days.

Probably OK, but...: Antibiotics don't work overnight, and it's not unusual for symptoms to get worse for a day or two. Typically I would not expect much improvement until 2-3 days. But to be safe, phone the ER or your doctor. If the swelling is severe, pain increasing, or fever, they might want to recheck things in person.

Dental Abscess: The abscess my need to be drained, either through the gingiva or the tooth. Have you consulted with a dentist or oral surgeon? Antibiotics alone may not be enough to control the infection, and certainly won't fix that rotten tooth.