24 hours: Typically it takes at least 24 hours before an antibiotic takes effect, but an antibiotic alone will not cure an abscessed tooth you need to have the tooth treated by a dentist.
Answered 1/18/2016
4.7k views
24 hours plus: This can vary depending on the cause of the abcess. However if you took the antibiotics on your without seeing a dentist first you should see one immediately because you may make the situation worse (more difficult diagnosis of problem or creation of a super infection of the wrong antibiotic for the wrong amount of time).
Answered 5/16/2018
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