Pharmacology Flashcards
LTB4
Neutrophil chemotactic agent
LTC4, D4, E4
Increases bronchial tone
PGE2 and PGE2alpha
Increases uterine tone, decreases bronchial tone
TXA2
Increase platelet aggregation, increase vascular tone, increase bronchial tone
PGI2
Decrease platelet aggregation, decrease vascular tone, decrease bronchial tone, decrease uterine tone
Low dose aspirin <300mg/d
decreases platelet aggregation
intermediate dose of aspirin 300-2400mg/d
antipyretic and analgesic
high dose aspirin 2400-400mg/d
anti-inflammatory
stimulates respiratory centers causing hyperventilation and respiratory alkalosis
Aspirin
Irreversibly inhibits COX-1 and COX-2 by covalent acetylation
Aspirin
NSAIDs
Ibuprofen, naproxen, indomethacin, ketorolac, diclofenac
reversibly blocks cyclooxygenase blocking PG syn
NSAIDs
used to close PDA
Indomethacin
Toxicity of NSAIDs
interstitial nephritis, gastric ulcer, renal ischemia
Reversibly inhibits COX2 found in inflammatory cells and vascular endothelium. Spares gastric mucosa
Celecoxib
Used in patient with RA and osetoarthritis who have gastritis or ulcers
Celecoxib
Reversibly inhibits cyclooxygenase, mostly in CNS. Inactivated peripherally
Acetaminophen
Use instead of aspirin to avoid Reye syndrome
Acetaminophen
N-acetylcysteine
Antidote for Acetaminophen toxicity which regenerates glutathione
Acetaminophen metabolite
NAPQI, depletes glutathione and forms toxic tissue adducts in liver
Pyrophosphate analogs; bind hydroxyapatite in bone, inhibiting osteoclast activity
Bisphosphonates like Alendronate
Clinical use for Bisphosphonates
osteoporosis, hypercalcemia, Paget dx of bone
Advise patients to take this w/ water and remain upright for 30 minutes
Bisphosphonates, can cause corrosive esophagitis
Osetonecrosis of jaw
S/E of bisphosphonate
Used in lymphoma and leukemia to prevent tumor lysis-associated urate nephropathy
Allopurinol
Inhibits Xanthine Oxidase
Allopurinol and Febuxostat
Inhibits reabsorption of uric acid in PCT (also inhibits secretion of penicillin)
Probenecid