Analgesics Flashcards
Dull, poorly localized pain
Type C - unmyelinated
Sharp, localized pain
Type A - Delta
Signs of inflammation
Redness, heat, swelling, and pain
Basic response to tissue injury
Inflammation
Increases permeability of blood vessels
Vasodilation
______ inflammation must be reduced to avoid additional damage to the body.
Severe
Pain sensation starts with____?
transduction and then carried to CNS
Two main groups of Anti-inflammatory drugs
Steroidal and Non-steroidal
Block the action of phospholipase
Steroidal anti-inflammatory drugs
Block the action of cyclooxygenase
Non-steroidal anti-inflammatory drugs
NSAID’s two forms
Cox-1 and Cox-2
Cox-1
Involved with modulation of renal blood flow and synthesis of gastric mucosa.
Cox-2
Involved with inflammation by promoting prostaglandin formation from cell membrane arachadonic acid.
NSAID’s are also referred to as?
prostaglandin inhibitors
What has fewer side effects than glucocorticoids?
NSAIDs
Side effects of NSAIDs?
GI ulceration and bleeding and bone marrow suppression.
Other adverse side effects of NSAIDs?
Hepatoxicity, nephrotoxicity, inhibition of cartilage metabolism, reduced platelet aggregation.
Potent inhibitors of prostaglandin synthesis by inhibiting cyclooxygenase?
Salicylates aka acetylsalicylates (aspirin)
Uses of Salicylates
Mild to Moderate pain Postadulticide HW treatment Analgesia/antipyrexia Feline cardiomyopathy Endotoxic shock
What drug are cats very susceptible to overdosing?
What side effect can this drug cause in dogs?
Salicylates (NSAID)
GI problems
Pyrazolone derivatives
Inhibit prostaglandin synthesis
Phenylbutazone is…?
Analgesic for mild to moderate pain, antipyretic and anti-inflammatory. Used for musculoskeletal pain in equine and canine medicine. Inject by IV only but can also be given orally. (NSAID)
Flunixin meglumin is…?
Inhibits cyclooxygenase, used in cattle and horses for musculoskeletal and colic pain, potent analgesic, antipyretic and anti-inflammatory. (NSAID)
What drug inactivates superoxide radicals produced by inflammation?
Dimethyl sulfoxide (DMSO)(NSAID)
Dimethyl sulfoxide is also able to…?
Penetrate skin, and serve as a carrier of other drugs. May cause burning and must use caution when applying.
Buscopan compositum (NSAID)
Contains dipyrone, is used for abdominal pain in colic, and penetrates the skin like DMSO.
What drug has a limited use in VM and should never be given to cats?
Acetominophen (NSAID)
Adverse side effects of Acetominophen?
Formation of methemoglobin and cyanosis, anemia and liver damage.
What drug blocks both cyclooxygenase and lipoxygenase?
Proprionic acid derivatives (NSAID)