NSAIDS #2 Flashcards
How are NSAIDs classified?
- Inhibitors of Prostanoids (PGs, TXA2)
- Miscellaneous Anti-Inflammatory Drugs
NSAIDs: Mechanisms of Action
NSAIDs: Adverse Effects
High doses
Long exposure
▪ Vomiting
▪ Diarrhea
**▪ GI ulceration, hemorrhage, and perforation
▪ Hepatotoxicity
▪ Renal toxicity
▪ Cardiovascular and blood toxicity
▪ CNS depression
▪ Circulatory disturbances
▪ Drug-drug interaction
NSAIDs that are used most commonly in humans can cause poisoning in small animals are?
Aspirin
Acetaminophen
Ibuprofen
Indomethacin
Naproxen
Pneumonic: IIAN
List the Desirable Features of NSAIDs
▪ Deactivate/desensitize _________ (_____)
▪ Attenuate ___________ response
▪ Synergistic with _______
▪ No ___________ or __________
▪ No ____________ depression
▪ Minimal ?
▪ ____ duration of action
▪ No ________ side effects
nociceptors, pain, inflammatory, opioids, addiction, dependence, respiratory, nausea/vomiting, Long, cognitive
COX-1 mediates ?
physiological responses (GI protection, platelet aggregation)
COX-2 is expressed by cells involved in ____________ (e.g.?) is responsible for
the synthesis of _____ and _____
inflammation, macrophages, monocytes, PGs, TXA2
Selective inhibition of COX-2 might have ?
better therapeutic responses
Selectivity of COX2 versus COX1 is often expressed as the?
COX1/COX2 inhibitory ratio
Write the inhibitory effect ratio.
If ratio is > _____, the drug is more specific for COX-2.
The inhibitory effect (IC50) = COX-1/COX-2;
COX-1/COX-2 >1, the drug is more specific for COX-2
COX-1 _______
COX-1 ______ ( _____ selective)
COX-2 _____
COX-2 _______
COX-2 ________ (______ selectivity)
selective, sparing, Non, specific, selective, preferential, limited
Potential benefits in inhibiting LOX pathway:
▪ Higher GI safety
▪ Greater analgesic efficacy
List the examples of Dual inhibitors:
Benoxaprofen
Ketoprofen
Licofelone
Corticosteroids (adverse effects)
Tepoxalin (Zubrin) is approved in Europe and USA
in animals (osteoarthritis in dogs)
List the NSAIDs that fall under the category of the following:
- Selective COX-1 inhibitor
- Non-selective COX inhibitors
- Selective COX-2 Inhibitors
- Dual Inhibitors - COX/LOX
See below
Selective COX-1 Inhibitors
Low-dose Aspirin
Non-selective COX Inhibitors
FAKIN
- Naproxen (AleveR)
- Ibuprofen (MotrinR, AdvilR)
- Ketoprofen ((AnafenR)
- Aspirin
- Flunixin meglumine
Selective-COX-2 Inhibitors
Dual Inhibitors COX / LOX
Tepoxalin
Adverse effects of NSAIDs
NS –> Aspirin - Dogs
Aspirin is not USDA –registered for dogs, but some forms are marketed
for dogs as if there were FDA approval. There is an approved combination
with methylprednisolone (Cortaba tablets)
COX-2 Inh for dogs?
Pneumonic:
Christine Eats Many Penises
______________ is Registered for dogs but not actively marketed
Phenylbutazone
Carprofen (________) Available as an ____________ and ____ (COX-___ sparing in dogs)
Rimadyl, injectable, oral, 1
Meloxicam (_______) is Registered for cats also as a ___ dose, available as an _____ and __
Metacam, single, injectable, oral
The NS Ketoprofen (Anafen) is registered for ?
cats only
Deracoxib (_________) is (COX-__ ______, first veterinary drug in this group)
Deramaxx, 2, specific
_________ _______ (Arquel) is _______ but not marketed
Meclofenamic acid, registered
__________ ____ (Tolfedine) is registered in ______ only, available as an ______ and ___
Tolfenamic acid, Canada, injectable, oral
Aspirin is a NSAID used to reduce?
Pain
Fever
Inflammation
Platelet aggregation
Aspirin: (low doses) prevents?
heart attacks and strokes.
Salicylic acid from _____ ____ have been used for ____ relief since ancient times
willow, bark, pain
Modification of Salicylic acid to ______ ________ ______ (____) = Aspirin
Acetyl Salicylic Acid (ASA)
Use of aspirin for pain and prevention of myocardial infarction
▪ Understanding the molecular mechanism of aspirin
Aspirin MOA
Aspirin irreversible inhibits COX-1 resulting in
decreased PG synthesis
decrease TXA2 expression
Effects of Aspirin
Analgesic
Antipyretic
Anticoagulant: platelet aggregation reducer
Anti-inflammatory: PGs expression reducer
Asprin PK:
Absorption from the _____ and ___ intestine
Bound to _____ (70-90%)
_____ t1/2 in cats (~30 hrs); in dogs (~ 8 hrs); in horses (~ 5 hrs)
_____ are sensitive to aspirin toxicity _____ are sensitive to GI effects (bleeding)
stomach, upper, albumin, Long, Cats, Dogs
______ are sensitive to aspirin toxicity
Cats
_____ are sensitive to GI effects (bleeding)
Dogs
Adverse effects of Asprin:
▪ GI distress: ?
▪ Paradoxical-_______ (body T above ______ F (____ C)
▪ _____ventilation, respiratory _____ (_____ depression)
▪ Metabolic ______
▪ ___________
▪ Pulmonary ______ (______)
▪ If chronic use —– _________ during surgery
▪ In dogs with _____, long-term use may result in aggravation of joint disease
▪ Drug-drug interaction (_______)
vomiting, anorexia, GI ulceration, diarrhea
hyperpyrexia, 106.70, 41.50, Hyper, acidosis, CNS, acidosis, Dehydration, edema, sheep, bleeding, OA, Warfarin
Treatment of aspirin-toxicity:
▪ Induce ______ in the case of ____ toxicity
▪ Increase _____ of the drug: gastric lavage followed by administration of activated _____
▪ Increase _____ excretion of aspirin by administrating an ______ agent
▪ Initiate IV ___ therapy to address _____ and metabolic ______
emesis, acute, removal, charcoal, urinary, alkalinizing, fluid, dehydration, acidosis
Aspirin
Contraindications: Patients with _____ GI ______; _______ disorders, _____, or _____ insufficiency
active, bleeds, bleeding, asthma, renal
Flunixin meglumie AKA?
Banamine
Flunixin: A _____-_________ COX inhibitor with potent __________ and ______-___________ effects
non-selective, analgesic, anti-inflammatory