How long does it take for amoxicilline to work on a tooth abscess?

If microorganisms: Susceptible to Amoxicillin therapy, then a few days usually. However, if the infection, which is usually a mixed infection (aerobes, anaerobes, gram +, gram -, etc.) has some resistant organisms or organisms which do not typically respond to amoxicillin, then perhaps a different antibiotic is indicated or adding an additional one. Consult the prescriber of the amox.

Approx 48 hours: Most oral antibiotics will take no less than 48 hours or so to start having a positive effect. There is no hard fast rule though. Sometimes it can take longer or be ineffective all together.

Abscessed tooth: It generally will take 24 -48 hours for an antibiotic to take effect. It is important for you to know that no antibiotic will not cure an abscessed tooth. You need definitive treatment of the tooth. An antibiotic may make things feel better until you can get the tooth treated. Sometimes this is only a short time. So get your tooth treated asap.

Average 2 days: Took years to become infected. Will take 1-3 days for antibiotic to take hold, w average of 48 hrs. Make sure to take entire course of medication. 2nd course sometimes needed. Antibiotic will control, not cure, infection. Tooth requires physical treatment (root canal/crown or extraction/implant/crown). Discuss best Rx w your Dentist.