Drug products, formulation development antioxidants

A preservative is a substance that prevents or inhibits microbial growth and extends the shelf life of the drug products. In most pharmaceutical drug products, only a few compounds are typically selected as preservatives. For efficiency, a generic method should be developed for the types of preservatives that are more commonly used. For example, butylated hydroxytoluene (BHT) is an antioxidant commonly used in many solid dosage formulations to retard oxidative degradation of the excipients. 

A preservative is a substance that extends the shelf-life of drug products by preventing oxidation or inhibiting microbial growth.14 Preservatives must be monitored in the products since they are considered to be active components. Generic HPLC assays are typically developed for preservatives such as buty-lated hydroxytoluene (BHT), an antioxidant for solid dosage forms, and antimicrobials such as parabens, sodium benzoate, or sorbic acid in liquid formulations. For these additive components, typical assay specifications are 85-115% of label claim. 

---