Purpose: Accelerated Stability Testing (AST) and Expiration Datingis used to predict the shelf life (expiration date) of a pharmaceutical product by subjecting it to elevated stress conditions (temperature, humidity, light) to speed up degradation reactions. Why It’s Important: Ensures drug efficacy, safety, and quality over time. Helps set expiration dates and storage recommendations. Aids in … Read more
Sorensen’s pH Scale is a numerical representation of the acidity or alkalinity of a solution. It was introduced by Danish chemist Søren Peder Lauritz Sørensen in 1909. Sørensen developed this scale to simplify the expression of hydrogen ion concentrations in solutions, which can vary over a wide range. Definition of pH The term “pH” stands … Read more
Explore education regulations in pharmacy under the Pharmacy Act focusing on course standards approval process and regulatory guidelines. Educational Qualifications: Diploma in Pharmacy (D.Pharm): 2 years (post-secondary) focusing on basic pharmaceutical sciences and dispensing. Bachelor of Pharmacy (B.Pharm): 4 years covering pharmaceutical sciences, including pharmacology, medicinal chemistry, and pharmacy practice. Master of Pharmacy (M.Pharm): 2 … Read more
Buffers are integral to maintaining proper function and stability in both pharmaceuticals and biological systems. Pharmaceutical Buffers Purpose: Stability: Many drugs are pH-sensitive; buffers maintain pH to prevent degradation. Solubility: The solubility of active ingredients can depend on pH. Efficacy and Safety: Proper pH ensures optimal drug action and minimizes irritation. Applications: Injectable Preparations: Must … Read more
Definition of Buffer Capacity Buffer Capacity (β): A quantitative measure of a buffer’s ability to resist pH changes. Mathematical Expression: $\beta = \frac{\Delta B}{\Delta{pH}}$ $\Delta \mathrm{pH}$ = amount (in moles per liter) of strong acid or base added. $\Delta B$ = change in pH resulting from the addition. Factors Affecting Buffer Capacities Concentration of Buffer … Read more
Buffer Equation, or Henderson-Hasselbalch equation, calculates the pH of a buffer solution based on the concentrations of its components. For Acidic Buffers Equation: $\mathrm{pH} = \mathrm{p}K_a + \log_{10} \left( \frac{[{A^-}]}{[{HA}]} \right)$ where: is the negative logarithm of the acid dissociation constant. is the concentration of the conjugate base. is the concentration of the weak … Read more
Once the isotonicity of a solution is determined, adjustments may be necessary. Methods are categorized into Class I and Class II. 1.Class I Methods of Adjusting Isotonicity Definition Methods that involve adding solutes to adjust the isotonicity of a solution without changing its volume significantly. Techniques Sodium Chloride Equivalent Method Concept: Calculates the amount of … Read more
Methods to Determine Isotonicity is Ensuring a solution is isotonic is vital for safety and efficacy. Two primary methods are employed to assess isotonicity: 1. Cryoscopic Methods to Determine Isotonicity The cryoscopic method evaluates a solution’s freezing point depression to determine its osmotic pressure. Principle: The presence of solutes lowers the freezing point of a … Read more
Buffered Isotonic Solutions are specially formulated liquids that match the osmotic pressure of the body’s natural fluids, such as blood and tears. Additionally, they incorporate buffering systems to maintain a stable pH environment. These solutions are crucial in pharmaceutical applications to ensure that when administered—whether through ophthalmic (eye) or intravenous (IV) routes—they are both compatible … Read more
Applications of Buffers are solutions that resist changes in pH upon addition of small amounts of acids or bases. Importance Applications of Buffers Chemical Reactions: Many reactions are pH-dependent; buffers maintain optimal pH for maximum efficiency. Biological Systems: Enzyme activities and metabolic processes require specific pH conditions. Pharmaceutical Formulations: Drug stability and solubility can be … Read more
