Introduction Lacosamide is a third-generation antiepileptic drug (AED) that is primarily used in the treatment of partial-onset seizures. It represents a novel approach to seizure control by selectively enhancing the slow inactivation of voltage-gated sodium channels. This distinct mechanism differentiates it from older AEDs, offering better tolerability and fewer drug interactions. Mechanism of Action (Step-wise) … Read more
Introduction Lubiprostone is a chloride channel activator used primarily to manage chronic idiopathic constipation, irritable bowel syndrome with constipation (IBS-C), and opioid-induced constipation. Unlike traditional laxatives, lubiprostone targets specific ion channels on the gastrointestinal epithelium to enhance fluid secretion and promote intestinal motility. This unique mechanism ensures more physiologic bowel movements with minimal systemic absorption. … Read more
Introduction Bicalutamide is a non-steroidal antiandrogen used primarily in the treatment of prostate cancer. It acts by blocking the action of androgens, which are critical in the development and progression of prostate malignancies. Unlike steroidal antiandrogens, bicalutamide offers selective androgen receptor antagonism with fewer hormonal side effects, making it an important drug in androgen deprivation … Read more
Introduction Finasteride is a synthetic 4-azasteroid that functions as a competitive and specific inhibitor of type II 5-alpha-reductase, the enzyme responsible for the conversion of testosterone to dihydrotestosterone (DHT). DHT is a potent androgen involved in the pathogenesis of benign prostatic hyperplasia (BPH) and androgenetic alopecia. By reducing DHT levels, finasteride alleviates symptoms associated with … Read more
Introduction Pioglitazone is an oral antidiabetic agent belonging to the thiazolidinedione (TZD) class. It is used primarily in the management of type 2 diabetes mellitus by improving insulin sensitivity. Unlike insulin secretagogues, pioglitazone does not increase insulin secretion but acts on peripheral tissues to enhance insulin action. Its unique mechanism involves modulation of gene expression … Read more
Introduction Teriparatide is a recombinant form of the first 34 amino acids of human parathyroid hormone (PTH 1-34), which represents the biologically active portion of the hormone. It is used primarily as an anabolic agent in the treatment of osteoporosis. Teriparatide is unique among osteoporosis therapies because it stimulates new bone formation rather than merely … Read more
Introduction Rivaroxaban is an oral anticoagulant belonging to the class of direct Factor Xa inhibitors. It is commonly prescribed for the prevention and treatment of thromboembolic disorders such as deep vein thrombosis (DVT), pulmonary embolism (PE), and stroke prevention in non-valvular atrial fibrillation. Unlike warfarin, rivaroxaban has a predictable pharmacokinetic profile and does not require … Read more
Introduction Ketamine is a unique anesthetic agent known for its dissociative anesthesia and analgesic properties. It is widely used in emergency medicine, anesthesia, and pain management. Unlike conventional GABAergic sedatives, ketamine works primarily by antagonizing the NMDA receptor, resulting in a trance-like state with preserved airway reflexes and spontaneous respiration. Mechanism of Action (Step-wise) 1. … Read more
Introduction Terlipressin is a synthetic vasopressin analogue and prodrug of lysine-vasopressin, primarily used to manage acute variceal bleeding and hepatorenal syndrome (HRS) in patients with advanced liver disease. It exerts selective vasoconstrictive effects through vasopressin V1 receptors, targeting the splanchnic circulation to improve effective arterial blood volume and renal perfusion. Mechanism of Action (Step-wise) 1. … Read more
Introduction Pyridostigmine is a reversible acetylcholinesterase inhibitor of the quaternary ammonium carbamate class. It is primarily used to treat myasthenia gravis, reverse nondepolarizing neuromuscular blockade, and has a role in certain autonomic dysfunctions. Known for its peripheral action and minimal central nervous system penetration, pyridostigmine improves neuromuscular transmission by increasing acetylcholine availability at synapses. Mechanism … Read more
