Introduction Penicillin VK (phenoxymethylpenicillin) remains a commonly prescribed antibiotic for many mild-to-moderate bacterial infections, such as strep throat, certain skin infections, and some respiratory tract infections. When taken correctly, Penicillin VK is highly effective and generally well tolerated. However, treatment success depends not only on receiving the right prescription but also on following dosing instructions, timing doses correctly, and maintaining goo