Learn Pharmacology
Discover high-yield pharmacology facts, mnemonics, and interactive learning content for every drug class.
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Explore drugs organized by clinical topics and therapeutic areas
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Ranitidine
Ranitidine Hydrochloride
Use:
GERD, peptic ulcer disease, heartburn
Mechanism:
Competitively inhibits histamine at H2 receptors in gastric parietal cells
Ramipril
Ramipril
Use:
Hypertension, heart failure, post-MI, stroke prevention
Mechanism:
Inhibits ACE enzyme, reducing angiotensin II formation
Rosuvastatin
Rosuvastatin
Use:
Hyperlipidemia, atherosclerotic cardiovascular disease prevention
Mechanism:
Inhibits HMG-CoA reductase, reducing cholesterol synthesis
Raloxifene
Raloxifene
Use:
Osteoporosis prevention and treatment, breast cancer risk reduction
Mechanism:
Estrogen agonist on bone, antagonist on breast and uterus
Ranibizumab
Ranibizumab
Use:
Age-related macular degeneration, diabetic retinopathy, macular edema
Mechanism:
Binds VEGF-A, preventing angiogenesis and vascular leakage
Rifampin
Rifampin
Use:
Tuberculosis, prophylaxis (meningococcal, H. influenzae)
Mechanism:
Inhibits bacterial DNA-dependent RNA polymerase
Risperidone
Risperidone
Use:
Schizophrenia, bipolar disorder, autism-related irritability
Mechanism:
Antagonizes dopamine D2 and serotonin 5-HT2A receptors
Rituximab
Rituximab
Use:
Non-Hodgkin lymphoma, CLL, rheumatoid arthritis, autoimmune diseases
Mechanism:
Binds CD20 on B-cells, causing cell lysis via antibody-dependent and complement-mediated cytotoxicity
Rivaroxaban
Rivaroxaban
Use:
Atrial fibrillation, DVT/PE treatment/prevention, post-surgery thromboprophylaxis
Mechanism:
Direct factor Xa inhibitor
Rocuronium
Rocuronium
Use:
Rapid sequence intubation, muscle relaxation for surgery
Mechanism:
Non-depolarizing neuromuscular blocker: competitively blocks nicotinic acetylcholine receptors
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