Histamine H2 receptor antagonists are competitive blockers of gastric parietal-cell H2 receptors that suppress basal and stimulated acid secretion and are used for GERD, peptic ulcer disease, hypersecretory states, and selected prophylaxis indications, with famotidine preferred clinically because of potency and safety while ranitidine has been withdrawn for NDMA contamination concerns. The class reduces nocturnal … Read more
Cephalosporin antibiotics are beta-lactam antibiotics derived from Cephalosporium acremonium, classified by generations based on their antimicrobial spectra and pharmacokinetic properties. They are among the most utilized antibiotics globally, due to broad efficacy and good safety profile. I. Mechanism of Action Cephalosporins bind to bacterial penicillin-binding proteins (PBPs) and inhibit the final transpeptidation step of peptidoglycan synthesis in … Read more
Introduction Among the most historically significant and widely used classes of antibiotics, penicillins have revolutionized the treatment of bacterial infections. Their discovery by Sir Alexander Fleming in 1928 laid the foundation for a new era in antimicrobial therapy. Since then, extensive research has led to the development of numerous penicillin derivatives, each tailored to broaden the spectrum … Read more
Methanol (methyl alcohol, wood alcohol) is a simple aliphatic alcohol with significant toxicological importance. It is colorless, volatile, and commonly used as a solvent, antifreeze, fuel, and in industrial chemical processes. Accidental or intentional ingestion of methanol, as well as inhalation or dermal exposure, can result in severe toxicity and death. The cardinal feature of … Read more
Introduction Have you ever wondered about the drugs that counteract the effects of the sympathetic nervous system? Sympatholytics, also known as adrenergic antagonists, are one such class of drugs. This article will dive into the classification, pharmacological actions, clinical uses, adverse effects, and contraindications of different types of sympatholytic drugs. So, let’s get started! Sympatholytics … Read more
Phosphodiesterase type 5 (PDE5) inhibitors are firstโline oral agents for erectile dysfunction that augment the endogenous nitric oxideโcGMP pathway in the corpus cavernosum to facilitate erection with sexual stimulation, and the class includes sildenafil, vardenafil, tadalafil, and avanafil. Standard pharmacology texts detail shared mechanisms with clinically important differences in onset, duration, food effects, selectivity, and … Read more