Pharmacy Freak Editorial Team 
Introduction Angiotensin Receptor Blockers (ARBs) are a class of drugs primarily used in the management of hypertension, heart failure, and diabetic nephropathy. They selectively inhibit the binding of angiotensin II to the angiotensin type 1 (AT₁) receptor, providing an alternative to ACE inhibitors with fewer adverse effects like cough and angioedema. Mechanism of Action (Stepwise) … Read more
Introduction Vonoprazan is a novel potassium-competitive acid blocker (P-CAB), introduced as a more potent and faster-acting alternative to proton pump inhibitors (PPIs). It is primarily used for acid-related disorders such as gastroesophageal reflux disease (GERD), peptic ulcer disease, and Helicobacter pylori eradication. Mechanism of Action (Stepwise Points) Pharmacokinetics Clinical Uses Adverse Effects Comparative Analysis Feature … Read more
Introduction Strattera, the brand name for atomoxetine, is a non-stimulant medication used primarily in the treatment of attention-deficit hyperactivity disorder (ADHD). Unlike stimulant medications such as methylphenidate or amphetamines, atomoxetine works through selective modulation of norepinephrine. Mechanism of Action (Stepwise Points) Pharmacokinetics Clinical Uses Adverse Effects Comparative Analysis Feature Atomoxetine (Strattera) Methylphenidate Amphetamine Drug Class … Read more
Introduction Buprenorphine is a semi-synthetic opioid derived from thebaine, widely used in both pain management and opioid dependence treatment. Its unique receptor profile—acting as a partial agonist at μ-opioid receptors—gives it a favorable safety and efficacy profile compared to full agonists. Mechanism of Action (Stepwise Points) Pharmacokinetics Clinical Uses Adverse Effects Comparative Analysis Feature Buprenorphine … Read more
Introduction Alendronate is a nitrogen-containing bisphosphonate used primarily in the treatment and prevention of osteoporosis and other bone-resorptive disorders. It acts by inhibiting osteoclast-mediated bone resorption, thereby maintaining or increasing bone mineral density. Mechanism of Action (Stepwise Points) Pharmacokinetics Clinical Uses Adverse Effects Comparative Analysis Parameter Alendronate Risedronate Zoledronate Route Oral Oral IV Dosing Frequency … Read more
Introduction Levetiracetam is a widely used antiepileptic drug (AED) known for its unique mechanism of action, high tolerability, and minimal drug interactions. It is indicated in the treatment of various seizure types and is favored in both pediatric and adult populations. Mechanism of Action (Stepwise Points) Pharmacokinetics Clinical Uses Adverse Effects Comparative Analysis Feature Levetiracetam … 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
Introduction Leuprolide is a synthetic gonadotropin-releasing hormone (GnRH) agonist used in conditions like prostate cancer, endometriosis, uterine fibroids, and central precocious puberty. Initially, it stimulates the pituitary gland, but with continuous use, it leads to receptor desensitization, suppressing gonadotropins and resulting in decreased sex hormone levels. Step-by-Step Mechanism of Action Pharmacokinetic Parameters Parameter Value Route … Read more
Introduction Guanfacine is a selective α₂A‑adrenergic receptor agonist used in treating ADHD and for managing hypertension. It enhances prefrontal cortex functioning by activating postsynaptic α₂A receptors, resulting in improved attention, impulse control, and reduced sympathetic tone. Step-by-Step Mechanism of Action Pharmacokinetic Parameters Parameter Value Bioavailability ~70–80% (oral) Time to Peak (Tₘₐₓ) ~1–4 hours Half‑Life ~17 … Read more
