Oxazepam
Oxazepam Mechanism of Action Oxazepam is a benzodiazepine that potentiates GABAA receptor activity by increasing the frequency of chloride channel opening. The result is a hyperpolarization of neuronal membranes, leading…
Oxaliplatin
Oxaliplatin Mechanism of Action Oxaliplatin is a third‑generation platinum‑based alkylating agent. Once inside the cell, it undergoes hydrolysis to release the active chloroplatinum(II) dichloroamine complex. The complex forms DNA cross‑links…
Oxacillin
Oxacillin Oxacillin is a penicillinase‑resistant β‑lactam antibiotic used primarily for Staphylococcus aureus infections that remain susceptible to penicillin. Mechanism of Action β‑lactam ring binds penicillin-binding proteins (PBPs), particularly PBP2a, inhibiting…
Otezla
Otezla Otezla® (apremilast) is an oral, selective phosphodiesterase‑4 (PDE4) inhibitor approved for the treatment of moderate‑to‑severe plaque psoriasis and active psoriatic arthritis, as well as oral ulcers associated with Behçet's…
Osimertinib
Osimertinib Osimertinib (trade name Tagrisso) is a third‑generation, irreversible epidermal growth factor receptor (EGFR) tyrosine‑kinase inhibitor (TKI) designed to target the T790M resistance mutation while sparing wild‑type EGFR. It is…
Oseltamivir
Oseltamivir Mechanism of Action Oseltamivir is a neuraminidase inhibitor that blocks the enzyme neuraminidase on the surface of influenza A and B viruses. This inhibition: Prevents cleavage of sialic acid…
Orphenadrine
Orphenadrine Orphenadrine is a first‑generation, centrally acting skeletal muscle relaxant with anticholinergic properties. It is used primarily to relieve acute muscle spasms and associated pain. Mechanism of Action Orphenadrine exerts…
Orlistat
Orlistat Orlistat is a lipase inhibitor approved for the management of obesity and overweight in adults. It is typically used as part of a comprehensive weight‑loss program including diet, exercise,…
Orladeyo
Orladeyo Orladeyo (tirzepatide) is a novel anti‑diabetic agent marketed as a dual agonist of the glucagon‑like peptide‑1 (GLP‑1) and glucose‑dependent insulinotropic polypeptide (GIP) receptors. It has gained attention for its…