Actinomyces are anaerobic, gram-positive bacteria that are commonly found in the oral cavity. The most effective antibiotics for treating Actinomyces infections include penicillins, tetracyclines, macrolides, and aminoglycosides. Penicillins are the most commonly prescribed, as they are effective in targeting both aerobic and anaerobic bacteria. Tetracyclines are also effective in targeting gram-positive bacteria, although they should be used with caution in children. Macrolides such as erythromycin are effective against gram-positive bacteria as well, while aminoglycosides such as gentamicin can be used to treat more severe or resistant infections. However, it is important to note that all of these antibiotics should only be used under the supervision of a physician. Additionally, it is essential to complete the entire course of antibiotics, even if you start to feel better, in order to prevent further infection or the development of antibiotic resistance.