Quinine
Quinine Mechanism of Action Quinine is a semi‑synthetic alkaloid that exerts its antimalarial effect by disrupting Plasmodium’s intraerythrocytic life cycle. Inhibition of heme polymerase – Quinine blocks the detoxification of…
Quinidine
Quinidine Mechanism of Action Quinidine is a Vaughan‑Williams Class Ia anti‑arrhythmic. Early‑phase (Phase 0) sodium channel blockade: slows rapid depolarization, reducing conduction velocity. Late‑phase (Phase 4) repolarization prolongation: increases action‑potential duration and…
Quinapril
Quinapril An angiotensin‑converting enzyme (ACE) inhibitor commonly used to treat hypertension, heart failure, and post‑myocardial infarction (MI) stabilization. Mechanism of Action Inhibition of ACE: Quinapril blocks the conversion of angiotensin‑I…
Quillivant XR
Quillivant XR --- Mechanism of Action Quillivant XR is an oral, extended‑release solution of quetiapine fumarate. Dopamine D₂/D₃ antagonist – reduces hyperdopaminergic activity in mesolimbic and mesocortical pathways. Serotonin 5‑HT₂A antagonist…
QuilliChew ER
QuilliChew ER Mechanism of Action QuilliChew ER is a premium, chewable extended‑release formulation of the opioid agonist Quilliothen. Mu‑opioid receptor activation – binds with high affinity to the μ‑opioid receptor…
Quetiapine
Quetiapine Quetiapine (brand name Seroquel®) is a second‑generation antipsychotic primarily indicated for schizophrenia and bipolar disorder. The following drug card provides concise, reference‑friendly information optimized for students, clinicians, and practitioners.…
Questran Light
Questran Light Questran Light is a low‑dose, high‑purity bile acid sequestrant designed for the management of hypercholesterolemia and gallbladder disorders. The formulation contains 10 g of cholestyramine per tablet, which is…
Questran
Questran Mechanism of Action Questran (cholestyramine) is a bile acid sequestrant that acts in the gastrointestinal lumen. Binds bile acids: It has a high affinity for bile acids (cholic, chenodeoxycholic,…
Quercetin
Quercetin Mechanism of Action Quercetin is a dietary flavonoid whose pharmacologic actions arise from multiple, inter‑related mechanisms: Antioxidant activity – scavenges reactive oxygen species (ROS) and up‑regulates endogenous antioxidant enzymes…
Quazepam
Quazepam Quazepam is a short‑acting melatonin‑like benzodiazepine primarily used for the treatment of insomnia. It possesses anxiolytic, hypnotic, anticonvulsant, and myorelaxant properties, albeit with a modest GABA‑A receptor affinity compared…