Comment from Anonymous
AnonymousOtherIndividual
Summary: The commenter is requesting clarification and additional guidance regarding the necessity of inverted orientation studies for lyophilized drug products. They argue that because these products are in a solid state before reconstitution, the risks may differ from those of tablets and require specific scientific justification.
For lyophilized drug products, clarification is requested on whether inverted orientation studies are considered necessary during stability studies. Since lyophilized products are in a solid state prior to reconstitution, the risk associated with product contact with the closure system may differ from tablets.
Additional guidance on the applicability and scientific justification for inverted stability studies for lyophilized products would support consistent implementation and harmonized regulatory expectations.