I had TKR in March 2024 and was told antibiotics are recommended when undergoing certain procedures and which type depending on the procedure. I am used to taking amoxicillin for dental appointments so always have it on hand. Since that is twice a year, I don't worry about side effects or taking too much although there are other instances listed on the little notice I carry in my wallet. It cautions to check with "your physician or dentist for a discussion on considering antibiotic treatment" prior to those listed or others. Glad it is only twice a year now.