Introduction Platelets play a pivotal role in hemostasis, forming plugs that stem bleeding after vascular injury. However, when platelet activity becomes dysregulated or excessive, it can precipitate arterial thrombosis, leading to pathologies such as myocardial infarction, stroke, and peripheral artery disease. Antiplatelet drugs target specific steps in platelet activation and aggregation, reducing the risk of these life-threatening … Read more
1 · Definition & Conceptual Overview Pharmacology is the scientific discipline that investigates how chemical agents (drugs) interact with living systems to modify physiological or biochemical functions. At its core, pharmacology seeks to explain: By integrating these perspectives, pharmacology underpins rational therapeutics — i.e., the safe and effective use of medicines in the prevention, diagnosis … Read more
Introduction Epilepsy, a chronic neurological disorder characterized by recurrent seizures, affects millions of individuals worldwide (Katzung, 2020). While the underlying pathophysiology varies, epilepsy generally arises from aberrant, hypersynchronous neuronal discharges in the brain. Such episodes can manifest differently, ranging from brief lapses in awareness to severe convulsions. Pharmacotherapy remains the primary approach to controlling or reducing seizure … Read more
Introduction Peptic ulcer disease (PUD) encompasses the formation of ulcers in the stomach (gastric ulcer) or duodenum (duodenal ulcer), primarily caused by gastric acid hypersecretion and/or compromised defense of the gastric and duodenal mucosa. While Helicobacter pylori (H. pylori) infection remains a principal etiology for many cases, other contributing factors include the use of nonsteroidal anti-inflammatory drugs (NSAIDs), stress-related mucosal injury, and Zollinger-Ellison syndrome (gastrinoma). Clinically, patients may present … Read more
Introduction Asthma is a chronic inflammatory disease of the airways, characterized by bronchial hyperresponsiveness, variable airflow obstruction, and repeated episodes of wheezing, coughing, chest tightness, and dyspnea. This condition affects more than 300 million people worldwide, imposing a significant burden on healthcare systems, impacting economic productivity, and compromising quality of life (Goodman & Gilman, 2018). While the etiology of asthma includes a complex interplay … Read more
Introduction Cough is a protective reflex integral to clearing the airways of irritants, secretions, and foreign matter. Without a properly functioning cough mechanism, the risk of airway obstruction, infection, and subsequent respiratory complications increases significantly. Despite this physiological importance, persistent or unproductive cough can be disruptive, painful, and socially distressing. Chronic cough, typically defined as one lasting more than 8 weeks, can also be a … Read more
Introduction Parkinson’s disease (PD) is a common neurodegenerative disorder characterized predominantly by motor symptoms including bradykinesia, rest tremor, rigidity, and postural instability. These cardinal clinical features trace back to the degeneration of dopaminergic neurons in the substantia nigra pars compacta, leading to reduced dopamine levels within the striatum of the basal ganglia. Along with the hallmark motor findings, patients often experience a variety of non-motor symptoms such as cognitive impairment, psychiatric manifestations, sleep disturbances, autonomic dysfunction, and sensory changes. … Read more
Introduction Sedative-hypnotics are a class of medications primarily utilized to induce sedation (calming) or hypnosis (sleep). These central nervous system (CNS) depressants work by enhancing inhibitory neurotransmission within the brain, thereby diminishing alertness, reducing anxiety, and facilitating the onset or maintenance of sleep. The broad category of sedative-hypnotics encompasses a variety of drug families, including benzodiazepines, barbiturates, non-benzodiazepine “Z-drugs”, and several others … Read more
Introduction Antidepressant medications are a cornerstone of modern psychiatric care, offering relief and long-term stabilization for individuals experiencing major depressive disorder, anxiety disorders, and other related conditions. These drugs emerged as a groundbreaking treatment alternative to earlier therapies, such as electroconvulsive therapy and long-term institutionalization. Over time, the pharmacology of antidepressants has become more refined, with newer … Read more
Introduction Tuberculosis (TB) is a potentially severe infectious disease caused primarily by the bacterium Mycobacterium tuberculosis. While TB most commonly affects the lungs (pulmonary tuberculosis), it can also spread to other parts of the body, including lymph nodes, bones, and the central nervous system (extrapulmonary tuberculosis). Despite global health efforts and declines in incidence in … Read more