G S Sachin

Introduction Suppositories are solid dosage forms intended for rectal, vaginal, or urethral administration, prepared primarily by fusion (molding), compression, or hand-rolling. For B. Pharm students, mastering methods of preparation includes base selection (cocoa butter, polyethylene glycol, glycerinated gelatin), mold calibration, displacement factor calculations, tempering, lubrication, and techniques for incorporating soluble/insoluble, volatile, and thermolabile drugs. Key … Read more

Introduction Suppository bases are critical to formulation performance, stability, and patient comfort. B. Pharm students must understand types of suppository bases—oleaginous (fatty) bases like cocoa butter and hard fats, water-soluble/miscible bases such as polyethylene glycol (PEG) and glycerinated gelatin, and water-dispersible emulsifying bases. Key concepts include melting behavior vs dissolution, polymorphism (especially of cocoa butter), … Read more

Introduction: Advantages and Disadvantages of Suppositories MCQs With Answer Suppositories are solid dosage forms intended for rectal, vaginal, or urethral delivery, offering local and systemic effects. Key advantages include partial avoidance of first-pass metabolism, suitability for pediatric/geriatric patients, use during vomiting or dysphagia, and targeted therapy for hemorrhoids, proctitis, or vaginal infections. Disadvantages include variable … Read more

Introduction Suppositories are solid dosage forms inserted into the rectal, vaginal, or urethral cavity, where they melt, soften, or dissolve to provide local or systemic effects. For B. Pharm students, understanding the definition, classification by route, base types (fatty/oleaginous, water-soluble/miscible), and release mechanisms is essential. Key bases include cocoa butter (theobroma oil), glycerinated gelatin, polyethylene … Read more

Introduction Emulsions are thermodynamically unstable dispersed systems widely used in pharmaceutics for oral, topical, and parenteral delivery. Stability problems include creaming, flocculation, coalescence, cracking, Ostwald ripening, and phase inversion. Key determinants are droplet size, interfacial tension, zeta potential, required HLB matching, emulsifier type (ionic/nonionic), viscosity, density difference, temperature, oxidation, and microbial contamination. Remedies span high-pressure … Read more