Exam Flashcards
What is Fluoxetine?
An SSRI that inhibits the reuptake of serotonin so it stays in synapses longer for receptors to collect and use.
what are the indications for fluoxetine?
major depressive disorder, OCD, bulimia and panic disorder
what is a typical dosage of fluoxetine?
10-20mg/day
what are overexpression effects of fluoxetine?
anxiety, headache, drowsiness, insomnia, increased sweating, tremor, serotonin syndrome, NMS, suicidal thoughts, mania, hypomania
what are some nursing considerations when administering fluoxetine?
monitor mood changes and SI, monitor for NMS and serotonin syndrome, give in the morning to lower the chance of insomnia
what is Venlafaxine?
it is an SNRI that inhibits the reuptake of serotonin and norepinephrine
what are the indiciations for venlafaxine?
major depressive disorder, GAD, panic disorder, and social anxiety
what is a typical dosage of venlafaxine?
75 mg/day in 2-3 divided doses
what are overexpression effects in venlafaxine?
anxiety, dizziness, insomnia, anorexia, nausea, constipation, headache, NMS, serotonin syndrome, suicidal thoughts
what are some nursing considerations when administering venlafaxine?
assess SI, monitor appetite, assess for serotonin syndrome, administer with food to decrease GI upset
what is lithium?
a mood stabilizer that alters cation transport in nerve and muscle decreasing incidence of acute mania
what are the indications for lithium?
acute mania and bipolar I
what is a typical dosage of lithium?
greater than 12 years = 400-900 mg 2x a day or 300-600 mg 3x a day
what are overexpression effects of lithium?
fatigue, headache, ECG changes, polyuria, muscle weakness, serotonin syndrome, seizures
what are nursing considerations when administration lithium?
administer with food, monitor serum lithium levels, assess mental status, monitor intake and output ratios
what is the range you want serum lithium levels to be?
0.5-1.2 mEq/L
what is Lorazepam?
a Benzodiazepine that depresses the CNS by increasing the power and effect GABA
what are the indications for lorazepam?
anxiety disorders, epileptics
what is a typical dosage for lorazepam?
1-3 mg 2-3x a day (dose can be up to 10mg/day)
what are overexpression effects of lorazepam?
dizziness, drowsiness, lethargy, constipation, weight gain, dependence
what are nursing considerations when administering lorazepam?
assess the degree of anxiety, prolonged treatment can lead to dependence. avoid alcoholic beverages for 24-48 hours after, have caution when performing activities requiring attention and coordination until drug effects subside. stopping abruptly may cause withdrawal symptoms
what is Ibuprofen?
a nonopioid analgesic that inhibits prostaglandin synthesis and decreases pain and inflammation. it blocks both the COX-1 and COX-2
what are indications for Ibuprofen?
mild-moderate pain, fever, RA, OA
what is a typical dosage for Ibuprofen?
400-800 mg 3-4x a day for adults
30-50 mg/kg/day in 3-4 divided doses for children 6mo-12 yr
what are adverse effects of ibuprofen?
headache, MI, stroke, constipation, nausea, vomiting
what are some nursing considerations when administering Ibuprofen?
PO administer with food, assess for skin rash, assess for signs of GI impairment, tablets can be crushed or mix with fluid or foods
what is prednisone?
a corticosteroid that suppresses inflammation and normal immune response. it replaces endogenous cortisol in deficiency states. has mainly glucocorticoid properties with minimal mineralocorticoid activity
what are the indications for prednisone?
inflammation, autoimmune disorders, allergic, hematologic
what is a typical dosage of prednisone?
5-60 mg/day
what are adverse effects of prednisone?
depression, euphoria, hypertension, anorexia, nausea, decrease wound healing, adrenal suppression, muscle wasting
what are nursing considerations when administering prednisone?
assess involved systems prior to beginning therapy, assess for adrenal insufficiency, monitor intake and output
what is Metformin?
a biguanide that encourages the liver to store more glucose and release less and try to make the receptors more sensitive to insulin
what are the indications for metformin?
type 2 diabetes
what are adverse effects of metformin?
lactic acidosis, bloating, diarrhea, nausea, vomiting, decreased vitamin B12 levels, metallic taste
what are nursing considerations for metformin?
administer at meals XR tablets must be swallowed whole, assess for lactic acidosis and ketoacidosis
what is glyburide?
a sulfonylurea that lowers blood sugar by stimulating the release of insulin from the pancreas and increasing sensitivity to insulin at receptor sites
what are the indications for glyburide?
PO control of blood sugar in type 2 diabetes
what are adverse effects of glyburide?
hypoglycemia, aplastic anemia, photosensitivity, increased appetite, nausea, rash, cramps
what are nursing considerations for glyburide?
assess for S&S of hypoglycemia, monitor CBC, administer w/meals but do not administer after last meal of day
what is pharmocogenetics?
studying the changes in enzyme structure and function based on genetic presentation
what are idiosyncratic responses?
how some people respond in an expected and unexplained way to medications
what is an allergy to medications?
a hyper-response of the immune system.
signs vary in severity
require a previous exposure to the drug
what is toxicity to medications?
harmful effects of drugs can be acute or chronic reversible or irreversible effects on the body may vary some toxicities are managed with antidotes such as Narcan and acetylcysteine for Tylenol overdose
what drugs cause bone marrow toxicities?
Antineoplastics (chemo), NSAIDs, Anticonvulsants.
they deplete RBC and WBC’s being produced
what drugs cause cardiotoxicity?
antineoplastics
what drugs cause dermatological toxicity?
penicilins, cephalosporings
what drugs cause skeletal muscle toxicities?
statins, they decreases cholesterol
what drugs cause hepatotoxicity?
statins, acetaminophen
Hepatotoxicity causes all drugs to be toxic since the liver won’t be able to metabolize drugs
what drugs cause nephrotoxicity?
ACE inhibitors, NSAIDs, loop diuretics
drugs won’t get excreted as easily when nephrotoxicity occurs
what drugs cause neurotoxicity?
loop diuretics
what is pharmcodynamics?
is what the drug does to the body
what are receptor sites?
the components on the cell surface that can react with drugs, viruses, and other chemicals
what is the therapeutic window?
where the safest and most effective treatment will occur
what is a half-life?
the time it takes the drug in the body to reach half its dose
what is tolerance?
a biological condition that occurs when the body adapts to a substance after repeated administration. Over time, higher doses are required to produce the same initial effect
what are antagonists?
a drug that attaches to a receptor and blocks the normal action of the cell
what is a loading dose?
a ‘jump start’ in order to reach the therapeutic effect of a drug. a higher dose is given at first
what are agonists?
a drug that attaches toa. receptor and mimics the normal action of the cell
what is polypharmacy?
taking multiple medications concurrently
what is affinity?
the binding strength of a medication
what is potency?
refers to the amount of medication required to produce a desired effect
what is efficacy?
the ability of a medication to produce a desired
or intended result
what is absorption?
occurs after medications enter the body and travel from site of administration into body’s circulation
what is distribution?
process by which medication is distributed throughout the body
what is metabolism?
breakdown of drug molecules
what is excretion?
process by which body eliminates waste
explain the first-pass effect
drugs that are administered orally or enterally face difficulties in the GI tract. they may be quickly deactivated by enzymes as they pass through the stomach and duodenum. if the drug makes it to the blood from the intestines then part of it will be broken down by liver enzymes. when that happens some of the drug will escape to general circulation and become protein-bound (inactive) or stay free and create action at the receptor site
what is transdermal?
drugs delivered enter blood via a meshwork of small arteries, veins and capillaries in the skin
what are neonatal and pediatric considerations regarding absorption of medications?
- the acid-producing cells in the stomach are immature until 1-2y/o
- gastric emptying is slow or irregular
- the liver continues to mature experiencing a decrease in first-pass elimination which results in increased drug levels in blood stream
what are older adult considerations regarding absorption of medications?
- experience decreased blood flow to tissues in the GI system
- changes in stomach gastric pH alter absorption of some meds
- decreased drug absorption occurs when peripheral circulation is decreased
- variations in available plasma proteins impact drug levels of meds that are protein-bound
what happens after a drug enters systemic circulation?
it must be distributed into interstitial and intracellular fluids to reach target cells.
what factors is distribution dependant on?
blood flow, plasma protein binding, lipid solubility, blood-brain barrier and placental barriers
what is a free drug?
a free drug is what traverses cell membranes and gives desired effects
what is a protein-bound drug?
acts as a drug resevoir that release drug slowly and prolong its effect
what is the blood-brain barrier?
blockade built from the tightly woven mesh of capillaries that protect the brain from dangerous substances
what are neonatal and pediatric considerations regarding distribution?
- fat content is decreased
- liver is still forming and protein binding capacity is decreased
- developing blood-brain barrier allows more drugs through
what are older adult considerations regarding distribution?
- body fat is increased meaning longer duration of drug action
- decreased serum albumin levels meaning more active free drug
what do the liver enzymes do in regards to metabolism of medications?
each enzyme has a specific job, some breakdown molecules apart and some link molecules into small chains
what are prodrugs?
prodrugs have chemical activities of their own
what are neonatal and pediatric considerations regarding metabolism of medications?
- developing liver produces decreased levels of microsomal enzymes and causes decreased ability to metabolize meds
- older kids have increased metabolism and need increased doses
what are older adult considerations regarding metabolism of drugs?
- hepatic metabolism declines
- first-pass metabolism decreases, meaning they will have increased levels of free circulating drug concentrations which put that at an increased risk for side effects and toxicities
what happens to remaining drugs and metabolites in the bloodstream?
they are filtered by the kidneys. a portion is reabsorbed into the bloodstream and a portion is excreted in the urine
what does the liver do in excretion of drugs?
some drugs are transported by hepatocytes to bile. as the bile goes through the bile duct into the gallbladder and small intestine, some of the bile gets absorbed by intestine back to the bloodstream and the unabsorbed drugs are excreted in the feces
what are neonatal and pediatric considerations regarding the excretion of drugs?
- immature kidneys, and decreased glomerular filtration, resorption and tubule secretion. they don’t clear drugs as efficiently
- increased levels of free circulating drugs can cause toxicity
what are older adult considerations regarding excretion of drugs?
- decreased kidney and liver function
- prolonged half-life greater chance for toxicity
what is the onset?
refers to when medication first begins to take effect
what is peak?
the maximum concentration of medication in the body and the patient shows greatest therapeutic effect
what is duration?
length of time medication produces a desired effect
what is titration?
working the way up to a dosage that is in the therapeutic window. it is accomplished by monitoring blood levels of a drug
when is the peak level of a drug drawn?
drawn at a time when the medication is administered and known to be at the highest level in bloodstream
when is the trough level of drugs drawn?
drawn when drug is at its lowest level in bloodstream right before next dose is given
what is the therapeutic index?
quantitative measurement of the relative safety of a drug
what is dopamine?
it influences impulses, motor impulses, cognition and how you think, and also motivation. increased levels of dopamine cause manic behaviour
what is 5HT?
5HT is serotonin. it has to do with levels of alertness, attention, mood. it is an anti-impulsive NT. lower levels result in bipolar, depression and anxiety
what is Norepinephrine?
it is the adrenaline of the brain. it increases metabolism. low levels cause depression, panic, and anxiety