Large tooth abscess, on penicillin just 3 days and it just started draining on its own.whats best way to keep it draining till i can get to the denti?

Stay with antibiotic: ... and try to get to your dentist ASAP, not when it blows up again. You can't stay on antibiotics for very long.

Tooth abcess: It is important that you see your dentist ASAP. The drainage and the penicillin will not cure you infection. You need to have this treated by a dentist. Warm salt water rinse will encourage drainage but is no substitute for dental care. Follow the directions that your dentist gave you when they prescribed the antibiotic.

Abscess: Antibiotics and drainage will control, not cure, an abscess. Do NOT discontinue antibiotics prematurely. Get to Dentist ASAP for definitive treatment as soon as possible.