Quiz 6 (Anti Inflammatory) Flashcards
Inflammation
Body’s response to injury
What is the purpose for inflammation?
Intended to be a protective mechanism
What are some clinical signs of inflammation? (3)
- Redness and heat
- Swelling and edema
- Pus
What can excessive or prolonged inflammation impair and cause?
can impair the healing process and cause pain to the animal
Corticosteroids
Hormones produced by the adrenal gland
What are the two types of cortico steroids produced?
- Mineralocorticoids
2. Glucocorticoid
What do Mineralocorticoids do?
regulate mineral levels in the body
what do Glucocorticoids do?
exert an anti-inflammatory effect, but also have many other effects in the body
How is the production of corticosteroid regulated?
Feedback inhibition mechanism
what are the biologic effects of glucocorticoids in the body?
- Decrease inflammation
- Inhibit scar tissue formation
- Suppress the body’s immune system
- Affect the cellular blood count
- Increase gastric acid secretion and decrease mucus production in GIT
- Increase protein breakdown
- Can induce parturition
- Increase blood glucose levels
What can an overuse of glucocorticoids lead to?
disease
How do glucocorticoid drugs differ?
Products currently used differ in duration of effect and dosage form available
What is the duration of the effect of short acting glucocorticoids?
What are some examples? (2)
biologic effect lasts < 12 hrs.
- hydrocortisone
- cortisone
What is the duration of the effect of intermediate-acting glucocorticoids?
What are some examples? (3)
effect lasts 12-36 hrs.
- prednisone (prednisolone)
- triamcinolone
- methylprednisolone
What is the duration of the effect of Long-acting glucocorticoids?
What are some examples? (3)
effect lasts more than 48 hrs.
- dexamethasone
- betamethasone
- flumethasone
What are the dosage forms available with glucocorticoids? (3)
- topical preparations
- oral
- injectable products
What are the glucocorticoid parenteral formulations? (3)
- Aqueous solutions
2. Alcohol solutions
How are aqueous glucocorticoid solutions made?
the glucocorticoid is combined with salt and dissolved in water
How are aqueous glucocorticoid solutions administered?
can be given in large doses intravenously w/ less risk of an adverse reaction
what are some examples of aqueous glucocorticoid solutions
- dexamethasone sodium phosphate (Azium),
2. prednisolone sodium succinate (Solu-Delta Cortef)
How are Alcohol glucocorticoid solutions made?
glucocorticoid is dissolved in alcohol
What happens when alcohol glucocorticoid solutions are administered IV?
adverse reaction
How are glucocorticoid Suspensions made?
the glucocorticoid is suspended in a liquid vehicle
What are some examples of glucocorticoids suspension?
- methylprednisolone acetate (Depo-Medrol)
2. triamcinolone acetonide (Vetalog)
How must glucocorticoid suspensions be stored?
store at room temperature
What must happen before use of glucocorticoid suspensions?
must be shaken before use
How is glucocorticoid suspension absorbed?
absorbed gradually over a period of days
what is the administration for glucocorticoid suspension?
should never be administered IV
Guidelines for safe use of glucocorticoids
- Use another drug if it can accomplish the same result
- Use the smallest dose possible
- Avoid continuous use
- Be cautious when using glucocorticoids with long-lasting effect
- When discontinuing, reduce dose over a period of days
- Use may be contraindicated in some patients
how do NSAIDS exert their effect?
Exert their effect by blocking enzymes in the inflammatory cascade
what is the benefit of NSAIDs over glucocorticoids?
Produce fewer side effects
what do NSAIDs bind to withing the system?
Highly bound to plasma proteins
what are some adverse effect on the GI tract?
anorexia, diarrhea, melena, ulcer formation
why do NSAIDs affect the GI tract?
they decreased protective prostaglandin production (PGE, PGI2)
what protective abilities do prostaglandins PGE and PGI2 have (4)
- Decrease volume and acidity of gastric secretions
2, Increase sodium bicarbinate secreations in the intestines - Increase gastric intestinal mucus productions
- Increase turnover and repair of GI epithelia cells
what kind of kidney damage can NSAIDs cause?
tissue necrosis
why do NSAIDs effect the kidey?
they decreased protective prostaglandin production (PGE2)
what species is phenylbutazone mostly used?
horses
what drug forms is phenylbutazone available in?
tablet, paste, and injectable forms
how does phenylbutazone provide an antiinflammatory response?
Inhibits cyclooxygenase
what are some adverse effects of phenylbutazone? (4)
- GI ulceration
- renal necrosis
- retention of water and sodium
- bone marrow suppression
which species have a very low tolerance to phenylbutazone?
Cats
what species is flunixin meglumine mostly used in to relieve severe pain?
horses
what form is flunixin meglumine availale in
injectable, paste and granules for oral administration
what kind of potent properties does flunixin meglumin have?
analgesic properties
what adverse effect can happen in dogs taking flunixin meglumine?
GI ulceration after 3-4 days of use
which NSAIDs derive from propionic acid?
Ibuprofen, Ketoprofen, Naproxen
How does flunixine meglumine provide an antiinflammatory effect?
Inhibit cyclooxygenase and lipooxygenase
what are some adverse effects in dogs?
GI ulceration after days of use
what does Acetylsalicylic Acid do when administered?
Decreases platelet aggregation by decreasing thromboxane production
how is Acetylsalicylic Acid metabolized
in the liver by binding it w/ glucuronic acid for elimination
why cannot cats metabolized Acetylsalicylic Acid?
they do not produce glucuronic acid
what is the newest group of NSAID agents referred to as?
COX-2 inhibitors
how do COX-2 inhibitors provide and antiinflammatory effect?
selectively inhibit production of prostaglandins associated w/ inflammation
what kind of an effect do COX-2 inhibitors have on the GI and kidney?
minimal effect
what are somepossible side effects with COX-2 inhibitors? (4)
- liver disease
- renal disease
- hematologic abnormalities
- serious GI disease reported
what kind of effect does acetaminophen have? (2)
- Provides analgesia
2. fever reducer
what kind of effect does not occur with acetaminophen? (2)
- No GI ulceration
2. no anti-inflammatory effect
what does the liver metabolize acetaminophen to?
Toxic metabolite
how is the toxic metabolite rendered non toxic?
binds to glutathione
what are some adverse side effect of acetaminophen with overdose? (3)
- Methemoglobinemia
- Heinz body formation
- liver tissue destruction
what is phenacetin?
what are the concerns?
OTC medication
The body will convert this to acetaminophen
how does dimethyl sulfoxide provide and antiinflammatory effect?
Inactivates superoxide radicals produced during inflammation
what other effects does dimethyl sulfoxide have?
Penetrates intact skin, can be used as vehicle to carry drugs into body
what are the adverse side effects of dimethyl sulfoxide?
- erythema
- edema and itching (w/ topical use)
- hemolysis (w/ IV administration)