Rocephin

Rocephin Rocephin (generic name ceftriaxone) is a third‑generation cephalosporin widely used for its broad spectrum against Gram‑positive and Gram‑negative bacteria, including many beta‑lactamase producers. Mechanism of Action Inhibition of bacterial…

Robitussin

Robitussin Robitussin is a family of over‑the‑counter cough syrups manufactured by Johnson & Johnson. The most common formulations include dextromethorphan (cough suppressant) and guaifenesin (mucolytic/expectorant). Other variants contain combinations such…

Robaxin

Robaxin Robaxin (generic methocarbamol) is a centrally acting skeletal‑muscle relaxant frequently prescribed to relieve acute muscle spasm and associated pain. Below is a succinct, pharmacy‑friendly reference card for students and clinicians.…

Rizatriptan

Rizatriptan Mechanism of Action Rizatriptan is a selective serotonin (5‑HT₁B/5‑HT₁D) receptor agonist. Vasoconstriction of cranial meningeal vessels reduces cerebral blood‑flow mediated pain. Inhibition of neuropeptide release (e.g., CGRP, substance P)…

Rivastigmine

Rivastigmine Mechanism of Action Rivastigmine is a reversible inhibitor of acetylcholinesterase (AChE) and butyrylcholinesterase (BChE). By blocking these enzymes, it increases synaptic acetylcholine availability, enhancing cholinergic transmission in both cortical…

Rivaroxaban

Rivaroxaban Rivaroxaban (brand name Xarelto) is a direct oral factor Xa inhibitor (DOAC) used for prevention and treatment of venous thromboembolism (VTE), atrial fibrillation (AF)-related stroke, and for secondary prevention…

Rituximab

Rituximab Rituximab (marketed as Rituxan™, Rituximabsan™) is a chimeric monoclonal antibody that targets CD20 on B‑cells, resulting in cell‑cycle‑phase‑independent depletion of malignant and autoreactive B cells. Mechanism of Action CD20…

Rituxan Hycela

Rituxan Hycela Rituxan Hycela (generic rituximab-pegol) is a pegylated monoclonal antibody targeting CD20, approved for certain indications in systemic non‑Hodgkin lymphoma, chronic lymphocytic leukemia (CLL), and rheumatoid arthritis (RA). It…

Rituxan

Rituxan Rituxan (rituximab) is a chimeric monoclonal antibody that targets the CD20 antigen on B‑lymphocytes. It is widely used in hematologic malignancies, autoimmune disorders, and off‑label indications for its potent…

Ritalin

Ritalin Mechanism of Action Methylphenidate (brand name Ritalin) blocks the dopamine transporter (DAT) and, to a lesser extent, the norepinephrine transporter (NET). By inhibiting reuptake, it increases extracellular levels of…