NSAIDS-GCs Flashcards
(104 cards)
Describe the MOA of tNSAIDS
reversible inhibition of COX1 and 2 and subsequent decrease in inflammatory prostaglandins and thromboxanes
Describe the Uses of tNSAIDs
- Pain (moderate dose)
- Fever (moderate dose)
- Inflammation (HD)
- More effective for acute pain than ASA-acetaminophen
- RA (indomethacin)
Adverse reactions of COX1 related
- GI upset/nausea
- Bleeding
- Ulceration
- Renal dysfunction/failure
- Interstitial nephritis
Adverse reactions of COX2 related
- Renal dysfunction/ failure
- Interstitial nephritis
- delayed labor/contractions
- ductus arteriosus closure
- Increase clotting risk
Adverse reactions of tNSAIDs
- similar to ASA
1. less bleeding (~2 days vs 4-7day of ASA)
2. GI upset (dyspepsia/ ulceration)
3. greater risk for renal dysfunction (reversible)
4. decrease RBF
5. fluid retention
6. increase BP (esp. in elderly)
7. OD: acute renal failure
8. Avoid in 3rd trimester pregnancy - incidence of GI toxicity reduced by concomitant use of PPIs or H2 antagonists
tNSAIDS that are mostly COX-2 inhibitors
- Meloxicam
2. Nabumetone
Analgesia and anti-inflammatory effects of NSAIDs are due to:
inhibition of inducible COX2 at site of TISSUE INJURY (PGE2/PGI2)
Anti-pyretic effects of NSAIDs are due to:
inhibition of inducible COX2 in HYPOTHALAMUS (PGE2)
Antithrombogenesis (anti-clotting) effects of NSAIDs are due to:
inhibition of constitutive COX1 in PLATELETS
4 Main groups of NSAIDs and their COX selectivity/reversibility
- tNSAIDs: reversible inhibition of COX1 and 2
- COX2 Selective inhibitors: Reversible selective inhibition of COX2
- Acetaminophen: reversible inhibition of CNS COX2
- Aspirin: irreversible inhibition of COX1 and COX2
Reversible inhibitor of COX (cyclooxygenase) 1 and 2: A. Aspirin B. Ibuprofen (Motrin®, Advil®) C. Naproxen (Naprosyn®, Aleve®) D. Celecoxib (Celebrex®) E. Acetaminophen (Tylenol®)
B. Ibuprofen (Motrin®, Advil®)
C. Naproxen (Naprosyn®, Aleve®)
Which agent should be avoided in hepatic dysfunction? A. Aspirin B. Ibuprofen (Motrin®, Advil®) C. Naproxen (Naprosyn®, Aleve®) D. Celecoxib (Celebrex®) E. Acetaminophen (Tylenol®)
E. Acetaminophen (Tylenol®)
*use w/ caution in pts w/ alcoholic liver dz
What NSAIDs:
- inhibits CNS COX only:
- does not have anti-inflammatory effects:
- has anti-platelet effects
- inhibits CNS COX only: acetaminophen
- does not have anti-inflammatory effects: acetaminophen
- has anti-platelet effects: aspirin
Which of the following actions of prostaglandins is INCORRECTLY matched with the form of the cyclooxygenase enzyme (COX-1 or COX-2) that synthesizes the particular prostaglandin?
A. Fever : COX-2
B. Inflammation : COX-1
C. Protection of GI cells : COX-1
D. Vasodilation in the kidney : COX-2
E. Activation of platelet aggregation : COX-1
F. Contraction of uterine smooth muscle : COX-2
G. Opening of ductus arteriosus : COX-1
B. Inflammation : COX-1
G. Opening of ductus arteriosus : COX-1
Physiological Functions of COX1
- Protection of GI cells
- Activation of platelet aggregation
- RBF maintenance
- Bone formation and resorption
Physiological Functions of COX2
- Fever
- Pain
- Inflammation (enhance edema)
- Vasodilation of the kidney
- Contraction of uterine Sm.M
- Anti-aggregatory platelet effects
- Opening of ductus arterosus
Examples of tNSAIDs
- Ibuprofen (Advil, Motrin)
- Naproxen (Aleve, Naprosyn)
- Ketoprofen
- Indomethacin
- Ketorolac (Toradol)
Describe the PK of Ibuprofen including form, absorption, administration, and elimination
- Form: PO and IV
- Absorption: rapid, complete absorption
- Administration: t1/2= 3-4hrs, BID-TID
- Elimination: Hepatic
Safest tNSAID in LD for GI tract: __
Highest risk with __
Ibuprofen (acetaminophen is safer but not a tNSAID)
Ketorolac
Describe the PK of Naproxen including form, administration, and elimination
- Form: PO
- Administration: t1/2= 12-15hrs, BID
- Elimination: RENAL
Describe the PK of Ketorolac including form and elimination
- Form: PO, IM/IV**, nasal spray
- Elimination: RENAL
Special uses of Ketorolac
- post surgical pain (IV)
* IM/IV comparable to morphine
Special uses of ibuprofen or naproxen
- Dysmenorrhea (via inhibition of synthesis of endometrial PGE)
* PG induced cramping
Adverse effects of Ketorolac
- GI toxicity –> limit use to 5 days