Antipyretic & Antimicrobial Medications Flashcards
NSAID
Non steroidal anti inflammatory inhibitors
Aspirin Classification
NSAID
Aspirin indication
pain, fever, inflammation
reduction of platelet aggregration
reduction of cancer risk
Aspirin MOA
inhibits Cyclooxygenase enzyme - both COX 1 and COX 2
to reduce fever, pain and inflammation, Aspirin inhibits COX 2
to to protect against MI and ischemic stroke, Aspirin inhibits COX 1
Aspirin is a __________ _________ of cyclooxygenase.
Non selective inhibitor
Side effects of Aspirin
GI effects- gastritis, dyspepsia, ulcers
renal impairment
bleeding
Side effects of Aspirin result from its inhibition of
COX 1 enzyme
What is unique about Aspirin’s inhibition of cyclooxygenase as compared to other NSAIDS?
it is irreversible, meaning that its duration of action depends on how quickly tissues can synthesize new molecules of COX-1 and COX-2
all other NSAIDS are reversible inhibitors and their effects decline as soon as blood levels fall
Nursing Considerations: Aspirin: Antipyretic Dosage
*Antipyretic: 325-650mg po every 4 hours
Nursing Considerations: Aspirin: Cardiac Dosage
Cardiac: may use 325mg po initially in acute event, then 81 mg/day.
Nursing Considerations: Aspirin
Should it be administered to children ?
NO.
*Do not administer to children or adolescents younger than 18 years due to risk of Reyes Syndrome
Nursing Considerations: Aspirin
Will enteric coating prevent GI bleeds?
should it be administered with food? what should be avoided with ingestion?
Some drug to drug interactions to be aware of
- Enteric coating may not prevent GI bleeding.
- Administer with food
- Avoid alcohol ingestion with medication as it can increase risk of gastric bleeding
*Drug-drug interactions/contraindications -
can intensify effects of anticoagulants so must be used with caution in combination
- use with caution with ACE inhibitors
-
Ibuprofen classification
NSAID
Ibuprofen indication
fever
analgesic - pain
anti-inflammation
Ibuprofen MOA
- Non-selective inhibitor of COX (1 and 2)
- Anti-inflammatory
- Antipyretic
Side effects of Ibuprofen
gastric bleeding (although risk is lower than that of Aspirin’s)
*GI – gastritis, dyspepsia, ulcers
*Bleeding
(Selective COX 2 inhibitors are known to cause an increased risk of thrombotic events; celecoxib (Celebrex))
Nursing Considerations: Ibuprofen
- Many drug-drug interactions/contraindications
- Administer with food
- Avoid alcohol ingestion with medication
Acetaminophen Classification
Acetaminophen is a Cyclooxygenase inhibitor that lacks any anti inflammatory properties.
It is an antipyretic and analgesic
Acetaminophen Indications
Fever
Analgesic
Acetaminophen MOA
inhibits cyclooxygenase (and thereby prostaglandin synthesis) within the CNS system, thus reducing fever and pain
No anti-inflammatory effects peripherally because it can’t inhibit prostaglandin synthesis outside the CNS
Acetaminophen Side Effects
Few and extremely rare at therapeutic doses.
does not cause gastric ulceration or renal impairment and does not inhibit platelet aggregation
Overdose can cause severe liver injury
How is Acetaminophen different from Aspirin ?
Acetaminophen does not have any anti inflammatory effects.
Acetaminophen does not suppress platelet aggregation, does not cause gastric ulceration and does not decrease renal blood flow or cause renal impairment
Nursing Considerations: acetaminophen and liver effects
Inform patient of potential for severe liver injury if there is an overdose
also advise patients with liver disease to ask their provider if acetaminophen is safe to take
Nursing considerations: Acetaminophen maximum total dosage a day
Advise patients to consume no more than 4000 mg (MAX) of acetaminophen a day, including the amount in combination prescription products (eg, Vicodin, Percocet) as well as OTC products.
Nursing Considerations: Acetaminophen and undernourished patients
Advise patients who are undernourished (eg, owing to fasting or illness) to consume no more than 3000 mg of acetaminophen a day.
Nursing Considerations: Acetaminophen and Alcohol
Advise patients not to drink alcohol while taking acetaminophen.
• Advise patients who won’t stop drinking alcohol (more than 3 drinks a day) to take no more than 2000 mg of acetaminophen a day.
What is unique about Acetaminophen as a Cyclooxygenase inhibitor?
It has no anti inflammatory effects.
What are the names of antibiotics affecting cell wall synthesis ?
Beta-lactam antibiotics
When instructing a patient in taking antibiotics, make sure to tell them what regarding taking treatment course?
Instruct the patient to complete the prescribed course of treatment, even though symptoms may abate before the full course is over.
Indications of antimicrobial effects
reduction in fever, pain, or inflammation; improved appetite or sense of well-being
What is selective toxicity ?
The ability of a drug to injure invading microbes without injuring cells of the host
What is a bactericidal drug ?
Kills bacteria
What is a bacteriostatic drug ?
Suppresses microbe growth
Penicillins Drug class
Beta-lactam
beta-lactamases - what are they-
also how does it relate to penicillins ?
chemicals manufactured by bacteria that make them resistant to all or most beta-lactam antibiotics, such as penicillin
There are drugs that combine a penicillin and a beta lactamase inhibitor to counteract these defenses
Penicillin Indication
both therapeutically and prophylactically
*Therapeutic: used for gram-positive bacteria ex. Strep and Staph & a few gram-negatives such as Neisseria, and syphilis (Treponema).
Some will cover anaerobes such as Enterobacter & also Pseudomonas, and Klebsiella
*Prophylactic: used to prevent bacteremia in selected populations at risk for endocarditis, such as people with artificial or damaged heart valves
Penicillin MOA
Affects cell wall synthesis
Penicillin Side Effects
Allergy
GI – diarrhea, dyspepsia
Renal impairment can cause penicillins to accumulate to toxic levels
Suprainfections possible
What should patients with a penicillin allergy do ?
Advise patients with penicillin allergy to wear some form of identification (eg, Medic Alert bracelet) to alert emergency healthcare personnel
Instruct outpatients to report any signs of an allergic response (eg, skin rash, itching, hives).
Penicillin overdose can cause …….
neurologic problems, including seizures
Penicillin is synergistic with aminoglycoside antibiotics, but they cannot be administered in ……
the same IV line.
Patients taking penicillin - instructions for taking them
Instruct the patient to take oral penicillins with a full glass of water 1 hour before meals or 2 hours after. Penicillin V, amoxicillin, and amoxicillin/clavulanate may be taken with meals.
Amoxicillin + clavulanic acid (these drugs combine a penicillin and a beta-lactamase inhibitor)
Augmentin
Ampicillin + sulbactam=
= Unasyn
Ticarcillin + clavulanic acid =
Timentin
Piperacillin + tazobactam =
Zosyn
Cephalosporin Drug Class
Beta-lactam antibiotics
Four generations:
*First generation
(eg, cephalexin)
*Second generation
(eg, cefoxitin)
*Third generation
(eg, cefotaxime)
*Fourth generation
(cefepime)
*Fifth generation
(ceftaroline)
With each generation of cephalosporins, what is there?
increased activity against gram-negative organisms and increased effectiveness against organisms that produce beta-lactamases
To avoid the development of resistant populations of bacteria, ______ and _______generations of cephalosporins should be reserved for serious infections!
third and fourth
Cephalosporins MOA
affects cell wall synthesis
Cephalosporins Side Effects
- Risk of increased bleeding with warfarin because of interference with Vitamin K metabolism
- Allergy
GI upset: diarrhea and pseudomembranous colitis
immune-mediated hemolytic anemia
*can promote clostridium difficile suprainfection
Cephalosporins are contraindicated for those with
a history of allergic reactions to cephalosporins or of severe allergic reactions to penicillins.
With cephalosporins, it is especially important to monitor …… and exercise caution in patients with a history of …….
the prothrombin time, bleeding time, or both. Parenteral vitamin K can correct abnormal prothrombin time. Observe patients for signs of bleeding and, if bleeding develops, discontinue the drug. Exercise caution in patients with a history of bleeding disorders and in patients receiving drugs that can interfere with hemostasis (anticoagulants; thrombolytics; antiplatelet drugs, including aspirin and other NSAIDs).
Alcohol and cephalosporins: good idea or not ?
NOT A GOOD IDEA. Several can trigger a disulfiram-like reaction if used with alcohol.
Advise patients about alcohol intolerance and warn them not to drink alcoholic beverages.
Patient instructions for Cephalosporins
Don’t intake with alcohol
make sure to refrigerate an oral suspension
Advise patients to take oral cephalosporins with food if gastric upset occurs.
report any diarrhea
Vancomycin Drug Class
Non beta-lactam
Vancomycin indications
A potentially toxic antibiotic only used to treat serious infections.
Can be used in treating gram+ infections (in those with PCN allergy)
Oral preparation can be used for bowel infections, particularly Clostridium difficile (a suprainfection) – topical to GI system, not absorbed by the bloodstream
For those allergic to penicillins and having a serious infection, this can be used …..
Vancomycins