I have a half there, half not there, canine tooth. No pain, but an abcess has grown way above it. Like into my sinus cavities almost. I occasionally taste it drain and it is God AWFUL! I spit that out. Yet it continues for a little longer. About two to three hours. I can suck on it and drain it. Wait about 30 min and repeat. I found clindamycin in my dresser. It's expired but I need to do something. My stomach can not handle the pills. Hence why I have so many leftover. But can I get same result if I place it directly on the abcess and into the cavity?