moa blog - Pharmacy Freak

Mechanism of Action of Semaglutide

April 10, 2026July 3, 2025 Pharmacy Freak Editorial Team Harsh Singh Rajput

Introduction Semaglutide is a long-acting glucagon-like peptide-1 receptor agonist (GLP-1 RA) used for type 2 diabetes mellitus (T2DM) management and chronic weight management. It mimics endogenous GLP‑1 to improve glycemic control and promote weight loss through central appetite suppression and delayed gastric emptying. Step-by-Step Mechanism of Action Pharmacokinetic Parameters Parameter Value Route Subcutaneous weekly injection Bioavailability … Read more

Mechanism of Action of Tolvaptan

April 10, 2026July 3, 2025 Pharmacy Freak Editorial Team Harsh Singh Rajput

Introduction Tolvaptan is an oral vasopressin V₂ receptor antagonist, approved for treating hyponatremia due to SIADH, heart failure, or cirrhosis, and for slowing disease progression in autosomal dominant polycystic kidney disease (ADPKD). It increases free water excretion (aquaretic effect) without significant electrolyte loss. Step-by-Step Mechanism of Action Pharmacokinetic Parameters Parameter Value Route Oral Bioavailability ~40% … Read more

Mechanism of Action of Amantadine

April 10, 2026July 3, 2025 Pharmacy Freak Editorial Team Harsh Singh Rajput

Introduction Amantadine is an antiviral agent and antiparkinsonian medication. Initially used for influenza A, it also treats drug-induced extrapyramidal symptoms and Parkinson’s disease. Its mechanism combines viral M2 ion channel inhibition and enhancement of dopaminergic neurotransmission in the central nervous system. Step-by-Step Mechanism of Action Pharmacokinetic Parameters Parameter Value Route Oral (capsule, syrup) Bioavailability ~86% … Read more

Mechanism of Action of Jardiance (Empagliflozin)

April 10, 2026July 3, 2025 Pharmacy Freak Editorial Team Harsh Singh Rajput

Introduction Jardiance (empagliflozin) is a sodium–glucose co-transporter 2 (SGLT2) inhibitor used for type 2 diabetes mellitus (T2DM), heart failure with reduced ejection fraction (HFrEF), and chronic kidney disease (CKD). It lowers blood glucose by increasing renal glucose loss and offers cardiovascular and renal benefits. Step-by-Step Mechanism of Action Pharmacokinetic Parameters Parameter Value Route Oral (tablet), once … Read more

Mechanism of Action of Apremilast (Otezla)

April 10, 2026July 3, 2025 Pharmacy Freak Editorial Team Harsh Singh Rajput

Introduction Apremilast (Otezla) is an oral phosphodiesterase-4 (PDE4) inhibitor approved for psoriasis, psoriatic arthritis, and Behçet’s disease‑associated oral ulcers. By modulating intracellular signaling, it reduces inflammation and disease symptoms through balanced cytokine regulation. Step-by-Step Mechanism of Action Pharmacokinetic Parameters Parameter Value Route Oral (delayed-release tablet) Bioavailability ~73% Time to Peak (Tmax) ~2–4 hours Protein Binding … Read more

Mechanism of Action of Eculizumab (Soliris)

April 10, 2026July 3, 2025 Pharmacy Freak Editorial Team Harsh Singh Rajput

Introduction Eculizumab is a humanized monoclonal antibody that selectively binds to complement protein C5, inhibiting its cleavage and preventing terminal complement complex formation. It is approved for paroxysmal nocturnal hemoglobinuria (PNH), atypical hemolytic uremic syndrome (aHUS), generalized myasthenia gravis (gMG), and neuromyelitis optica spectrum disorder (NMOSD). Step-by-Step Mechanism of Action Pharmacokinetic Parameters Parameter Value Route … Read more

Mechanism of Action of Vericiguat (Verquvo)

April 10, 2026July 2, 2025 Pharmacy Freak Editorial Team Harsh Singh Rajput

Introduction Vericiguat is a soluble guanylate cyclase (sGC) stimulator used in patients with chronic heart failure with reduced ejection fraction (HFrEF) following hospitalization or intravenous diuretics. It enhances the nitric oxide (NO)–sGC–cGMP pathway to support cardiovascular function. Step-by-Step Mechanism of Action Pharmacokinetic Parameters Clinical Uses Adverse Effects Comparative Analysis Feature Vericiguat (sGC Stimulator) Nitrates PDE5 … Read more

Mechanism of Action of Wellbutrin (Bupropion)

April 10, 2026July 2, 2025 Pharmacy Freak Editorial Team Harsh Singh Rajput

Introduction Wellbutrin (bupropion) is an atypical antidepressant and smoking cessation aid. It primarily works by inhibiting reuptake of norepinephrine and dopamine, without affecting serotonin. Additionally, it acts as a nicotinic receptor antagonist, reducing nicotine cravings. Step-by-Step Mechanism of Action Pharmacokinetic Parameters Parameter Value Route Oral (IR, SR, XL formulations) Bioavailability ~5–20% Time to Peak (Tmax) … Read more

Mechanism of Action of Januvia (Sitagliptin)

April 10, 2026July 2, 2025 Pharmacy Freak Editorial Team Harsh Singh Rajput

Introduction Januvia (sitagliptin) is an oral dipeptidyl peptidase‑4 (DPP‑4) inhibitor used to improve glycemic control in type 2 diabetes mellitus (T2DM). It enhances incretin levels, thereby increasing insulin secretion and lowering glucagon in a glucose-dependent manner. Step-by-Step Mechanism of Action Pharmacokinetic Parameters Parameter Value Route Oral (tablet) Bioavailability ~87% Time to Peak (Tmax) ~1–4 hours Protein … Read more

Mechanism of Action of Anakinra

April 10, 2026July 2, 2025 Pharmacy Freak Editorial Team Harsh Singh Rajput

Introduction Anakinra is a recombinant human interleukin‑1 receptor antagonist (IL‑1Ra) used to treat rheumatoid arthritis, neonatal-onset multisystem inflammatory disease (NOMID), and other autoinflammatory conditions. It competitively inhibits IL‑1α and IL‑1β binding to IL‑1 receptors, effectively reducing inflammation. Step-by-Step Mechanism of Action Pharmacokinetic Parameters Parameter Value Route Subcutaneous injection (daily) Bioavailability ~95% Time to Peak (Tmax) … Read more