Introduction Vyvanse (lisdexamfetamine) is a central nervous system stimulant used to treat ADHD and binge-eating disorder. It is a prodrug, meaning it becomes active only after enzymatic conversion in the body. This mechanism provides a smoother onset, extended action, and lower risk of misuse. Its active metabolite, dextroamphetamine, boosts dopamine and norepinephrine in the brain—improving … Read more
Introduction Dexmedetomidine is a highly selective alpha-2 adrenergic receptor agonist used for sedation in intensive care settings and during surgical procedures. It provides sedation without significant respiratory depression, distinguishing it from other sedatives like benzodiazepines and propofol. Its analgesic-sparing and sympatholytic effects further enhance its clinical utility. Step-by-Step Mechanism of Action Pharmacokinetic Parameters Parameter Value … Read more
Introduction Apixaban is a direct oral anticoagulant (DOAC) used to prevent and treat thrombosis. It is specifically indicated for stroke prevention in non-valvular atrial fibrillation, treatment and prevention of venous thromboembolism (VTE), and management of deep vein thrombosis (DVT) and pulmonary embolism (PE). Its predictable pharmacokinetics and oral administration make it a widely used alternative … Read more
Introduction Non-steroidal anti-inflammatory drugs (NSAIDs) are among the most widely used medications globally. They are primarily prescribed for their analgesic, anti-inflammatory, and antipyretic properties. Whether it’s managing acute pain, chronic arthritis, or postoperative inflammation, NSAIDs are essential tools in clinical practice. Understanding their classification is critical for pharmacy students and healthcare professionals to ensure rational … Read more
Introduction Ondansetron is a highly selective 5‑hydroxytryptamine 3 (5‑HT₃) receptor antagonist used primarily as an antiemetic. It prevents nausea and vomiting triggered by chemotherapy, radiotherapy, surgery, and gastrointestinal irritants. It acts both peripherally in the gastrointestinal tract and centrally in the brainstem’s vomiting centers. Step‑by‑Step Mechanism of Action Pharmacokinetic Parameters Parameter Ondansetron Values Bioavailability ~60% … Read more
Introduction Non-steroidal anti-inflammatory drugs (NSAIDs) are a widely used class of medications with analgesic, anti-inflammatory, and antipyretic properties. They are commonly prescribed for pain relief, reducing inflammation in conditions like arthritis, dysmenorrhea, and fevers. NSAIDs achieve these effects by inhibiting cyclooxygenase enzymes involved in prostaglandin synthesis. Step‑by‑Step Mechanism of Action Pharmacokinetic Parameters Parameter Ibuprofen (Representative … Read more
Introduction Tranexamic acid (TXA) is an antifibrinolytic agent commonly used to control or prevent excessive bleeding in trauma, surgery, heavy menstrual bleeding, and in hemophilia patients undergoing dental procedures. It stabilizes clots by inhibiting the breakdown of fibrin, thus reducing blood loss and improving hemostasis. Step-by-Step Mechanism of Action Pharmacokinetic Parameters Parameter Value Bioavailability ~30–50% … Read more
Introduction Hydralazine is a potent vasodilator used primarily in the management of hypertension and heart failure, particularly in patients intolerant to ACE inhibitors or with resistant hypertension. It acts directly on vascular smooth muscle, causing arterial dilation and thereby reducing both afterload and cardiac workload. Its rapid onset and efficacy make it valuable in acute … Read more
Introduction Heparin is a widely used anticoagulant primarily employed in the prevention and treatment of thromboembolic disorders such as deep vein thrombosis, pulmonary embolism, and myocardial infarction. As a naturally occurring glycosaminoglycan, heparin exerts its anticoagulant effects by enhancing the activity of antithrombin III (AT III), leading to the inactivation of key coagulation factors. It … Read more
Introduction Gabapentin is an anticonvulsant and analgesic drug primarily used in the treatment of epilepsy, neuropathic pain, and restless legs syndrome. Though structurally related to gamma-aminobutyric acid (GABA), gabapentin does not bind to GABA receptors or influence GABA metabolism. Instead, it modulates neuronal excitability by interacting with voltage-gated calcium channels. Its favorable safety profile and … Read more
