A FDA C223864 SPL Therapeutic Equivalents Codes Terminology C223865 A A FDA C223864 SPL Therapeutic Equivalents Codes Terminology C223866 B A FDA C223864 SPL Therapeutic Equivalents Codes Terminology C223867 OTC A FDA C223864 SPL Therapeutic Equivalents Codes Terminology C223868 N A FDA C54452 FDA Structured Product Labeling Terminology C223865 A A FDA C54452 FDA Structured Product Labeling Terminology C223866 B A FDA C54452 FDA Structured Product Labeling Terminology C223867 OTC A FDA C54452 FDA Structured Product Labeling Terminology C223868 N