Process Validation of Liq-Biotic™ a Veterinary Herbal Product: Ensuring Consistency, Quality, and Efficacy in Herbal Formulations

Pharmaceutical formulations must be manufactured in accordance with stringent quality standards to ensure product safety, efficacy, and consistency. Process validation is a critical element of pharmaceutical manufacturing, providing documented evidence that a process is capable of consistently producing products that meet predefined specifications and quality attributes. As defined by the U.S. Food and Drug Administration (FDA), validation establishes a high degree of assurance that a manufacturing process will reliably deliver products of the required identity, purity, and potency with minimal variability. Herbal medicines have experienced substantial global growth owing to their natural origin and perceived lower incidence of adverse effects. However, in large-scale manufacturing, product quality is influenced by multiple operational factors, including process parameters, equipment performance, technical conditions, and raw material variability. Consequently, quality assurance has become an essential focus in the evaluation and manufacture of traditional medicinal plants and herbal formulations. In the present study, operational validation of the mixing process for the large-scale manufacture of Liq-Biotic™ was conducted. Phytochemical constituents in polyherbal formulations serve as critical quality attributes and key control variables for process validation. The development of robust and reliable analytical methods to characterize these constituents and ensure batch-to-batch consistency remains a significant scientific challenge. In this study, thymol, identified as a key quality attribute of Liq-Biotic™, was quantitatively analysed using a validated RP-HPLC-PDA method. The impact of mixing time on formulation uniformity was systematically evaluated, and the mixing behaviour of the herbal formulation was characterized. The results demonstrate that liquid homogeneity within the mixing vessel is dependent on mixing duration, highlighting the importance of controlling this parameter to prevent segregation. Effective control across the manufacturing process is therefore essential to ensure product integrity and compliance with established acceptance criteria.