I have a patient who is already taking antibiotics. How does that affect the prophylactic regimen?
If a patient is already receiving antibiotic therapy with a medication that is also recommended for infective endocarditis (IE) prophylaxis, the guidelines state that it is prudent to select an antibiotic from another class rather than to increase the dose of the currently administered antibiotic. For example, if a patient is already taking amoxicillin, the dentist should select clindamycin, azithromycin, or clarithromycin for IE prophylaxis.