Final answer:
The AHA recommends benzathine benzylpenicillin every 3 or 4 weeks for endocarditis prophylaxis, with additional antibiotics depending on the patient.
Step-by-step explanation:
The American Heart Association (AHA) recommends a treatment regimen for endocarditis prophylaxis. This involves administering benzathine benzylpenicillin every 3 or 4 weeks, depending on the patient's risk for reinfection. Additional antibiotic treatment may be recommended based on the patient's age and risk factors for reinfection.