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 Ipilimumab is a fully human monoclonal antibody classified under immune checkpoint inhibitors. It plays a pivotal role in cancer immunotherapy by targeting cytotoxic T-lymphocyte-associated protein 4 (CTLA-4), a regulatory molecule that downregulates immune responses. By blocking CTLA-4, ipilimumab enhances T-cell activation and proliferation, leading to a more robust antitumor immune response. It has been … 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 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
Introduction Phenytoin is a first-generation anticonvulsant and hydantoin derivative widely utilized for the management of generalized tonic-clonic seizures, complex partial seizures, and status epilepticus. It also has historical use in certain cardiac arrhythmias. Known for its narrow therapeutic index, phenytoin requires careful dosing and monitoring, yet remains a mainstay in epilepsy therapy due to its … Read more
Introduction Tetrabenazine is a centrally acting vesicular monoamine transporter 2 (VMAT2) inhibitor used primarily to manage hyperkinetic movement disorders. It is especially effective in reducing chorea associated with Huntington’s disease. By depleting monoamines such as dopamine from nerve terminals, it helps in restoring neurochemical balance in the basal ganglia. Mechanism of Action (Stepwise Points) Pharmacokinetics … Read more
Introduction Alteplase is a recombinant tissue plasminogen activator (rt-PA) used as a thrombolytic agent. It plays a crucial role in the dissolution of fibrin clots and is utilized primarily in acute ischemic stroke, myocardial infarction, and pulmonary embolism. This agent mimics the naturally occurring enzyme tissue plasminogen activator (tPA), facilitating clot breakdown and restoring blood … Read more
