Pantoprazole
Pantoprazole Mechanism of Action Selective irreversible inhibitor of the H⁺/K⁺‑ATPase (proton pump) located in the gastric parietal cell secretory canaliculus. Binds covalently to cysteine residues on the cytoplasmic domain of…
Ozempic
Ozempic Mechanism of Action Ozempic (semaglutide) is a glucagon‑like peptide‑1 (GLP‑1) receptor agonist. It binds to the GLP‑1 receptor on pancreatic β‑cells to stimulate insulin secretion in a glucose‑dependent manner.…
Oxytocin
Oxytocin Oxytocin (brand: Pitocin) is a non‑peptide oxazolidine‑threonine polyamine hormone that plays a pivotal role in uterine contraction and lactation. Its synthetic analogue is indispensable in obstetric and gynecologic practice…
Oxymetazoline nasal
Oxymetazoline Nasal Mechanism of Action Selective α₁‑ and α₂‑adrenergic receptor agonist Activates α₁ receptors → vasoconstriction of nasal mucosal arterioles → ↓ blood flow, ↓ mucosal edema, ↓ secretions. Activates…
Oxygen
Oxygen Mechanism of Action Oxygen (O₂) is a physiologic substrate essential for aerobic metabolism. Diffusion into alveoli: Inhaled O₂ diffuses across the alveolar–capillary membrane into pulmonary capillaries. Transport: ~97 % of…
Oxycontin
Oxycontin Oxycontin is the brand name for a sustained‑release formulation of oxycodone, a potent μ‑opioid receptor agonist. It is indicated for the management of moderate to severe pain that requires…
Oxycodone
Oxycodone Mechanism of Action Oxycodone is a potent, selective agonist at the mu‑opioid receptor (MOR), producing analgesia, sedation, and euphoria through inhibition of cyclic‑AMP production in nerve terminals. Partial agonism…
Oxybutynin
Oxybutynin Mechanism of Action Anticholinergic (butyrylcholinesterase inhibitors) Competitive antagonist of muscarinic M3 receptors on bladder detrusor muscle → ↓ smooth‑muscle contraction. Reduces bladder overactivity, urgency, urge incontinence. Inhibits secretion of…
Oxtella XR
Oxtella XR Oxtella XR is a clinically‑approved, extended‑release oxytocin analog marketed as a single‑dose formulation for obstetric and lactation indications. Mechanism of Action Selective activation of oxytocin receptors (OTRs) on myometrial smooth…
Oxcarbazepine
Oxcarbazepine Oxcarbazepine is a keto‑analog of carbamazepine, approved for seizure control and adjunct therapy in certain pain disorders. It is frequently singled out for its favorable metabolic profile and lower…