Pharm #3 Flashcards
Effects the sympathetic nervous system
Adrenergic
Sympathomimetics-
adrenergic agonists
Adrenergic antagonist-
sympatholytic
Brain
Spinal Cord
Central Nervous System (CNS)
Peripheral Nervous System (PNS) is made up of
Autonomic Nervous System
Somatic Nervous System
Visceral System (Smooth muscle and glands)
Autonomic Nervous System
Voluntary System (skeletal muscles)
Somatic Nervous System
Autonomic Nervous System Controls
Cardiac and respiratory systems
GI tract
Bladder
Eyes
Glands
Smooth muscle- digestion
Involuntary system
Autonomic Nervous System
Dominant in Stressful Situations (“Fight or Flight” response)
Sympathetic Nervous System
Adrenergic system- transmitting epinephrine and norepinephrine
Sympathetic Nervous System
Dominant in Peaceful Situations, hemostasis
Parasympathetic Nervous System
Sympathetic Nervous System (Adrenergic system): 4 Types of Receptor Cells:
Alpha 1
Alpha 2
Beta 1
Beta 2
Parasympathetic Nervous system (Cholinergic System): 2 Types of Receptor Cells:
Muscarinic
Nicotinic
Drugs can mimic neurotransmitters: (adrenergic agonist)
Norepinephrine
Acetylcholine
Will have opposite effects on the same organ
adrenergic antagonist
Drugs can be:
Sympathomimetics
Sympatholytic
Parasympathomimetic
Parasympatholytic
If there are one or more adrenergic receptor sites located in the cells of the muscle-
heart, bronchiole walls, GI, Bladder, Ciliary muscles of the eye (constricting and dilating)
Sympathetic Stimulants =
Sympathomimetics (mime), adrenergic, adrenergic agonists
Sympathetic Depressants =
Sympatholytic, Adrenergic blockers, adrenolytic, adrenergic antagonists
Parasympathetic Stimulants (2 categories)
Direct-acting and Indirect-acting
Direct acting –
parasympathomimetic, cholinergic, cholinergic agonists
Indirect acting –
cholinesterase inhibitors
Parasympathetic Depressants =
Parasympatholytics, anticholinergics, cholinergic antagonists, antispasmodics
Function of adrenergics: Eye
Dilates Pupil
Function of adrenergics: Lungs
Dilates bronchioles
Function of adrenergics: Heart
Increased HR
Function of adrenergics: Blood vessels
Constrict
Function of adrenergics: Gastrointestinal
Relax
Function of adrenergics: Bladder
Relax
Function of adrenergics: Uterus
Relax
Increases cardiac contractility, vasoconstriction
Alpha1 receptors
Dilates pupils, decreases salivary gland secretion
Alpha1 receptors
Increases bladder and prostate contraction
Alpha1 receptors
Inhibits norepinephrine release
Alpha2 receptors
Promotes vasodilation and decreased BP
Alpha2 receptors
Decreases GI motility and tone
Alpha2 receptors
blood vessels, eyes, bladder, and prostate
Alpha 1 Adrenergic-
Alpha 1 receptors activates-
venules and arterioles=contraction
Increased cardiac contractility, blood pressure, return of blood circulation to the heart, blood flow to vital organ
Alpha 1 receptors
If too much stimulation= decrease in blood flow to other areas
Alpha 1 receptors
sympathetic nerve endings, releasing norepinephrine, decreases blood pressure and causes vasodilation
Alpha 2 receptors
Increases cardiac contractility, heart rate
Beta1 receptors
Increases renin secretion and increases BP
Beta1 receptors
Decreases GI tone and motility
Bronchodilation
Increases blood flow in skeletal muscles
Relaxes smooth muscles of uterus
Activates liver glycogenolysis
Increases blood glucose
Beta2 receptors
Beta 1= 1 heart, increasing myocardial contractility, increasing HR and renin secretion from kidneys to increase BP
Beta 1=
2 lungs, found in lungs also GI tract, liver and uterine muscle. Stimulated it causes bronchodilation (Abuterol).
Decrease GI tone and motility.
Activates glycogenolysis in the liver= Increase of blood glucose, relax uterine muscles
Beta 2 =
located in the renal, mesenteric, coronary, and cerebral arteries
Dopaminergic receptors–
Vasodilation
Increases blood flow
Dopaminergic receptors–
Activated by dopamine
Causing vasodilation
Dopaminergic receptors–
Reuptake of transmitter back into neuron
Neurotransmitter Inactivation
Neurotransmitter Inactivation: Enzymatic transformation or degradation
MAO inside neuron
COMT (chemical break down of the drug) outside neuron
Diffusion away from the receptor
Neurotransmitter Inactivation
Drugs halt termination of neurotransmitter by inhibiting
Norepinephrine reuptake
Norepinephrine degradation
Body sending out neurotransmitters body has to tell to stop releasing
Neurotransmitter Inactivation
Drugs can block stimulation of transmitters
Neurotransmitter Inactivation
Reuptake of transmitter back into neuron-
Plays more of an important role of the enzyme activity of the drug
Out rules the liver
Neurotransmitter Inactivation
Drugs can prolong the action of the neurotransmitter by
inhibiting reuptake (blocking) or
inhibiting metabolism of the drug itself (staying in the system longer)
Classification of Adrenergic Agonists
Direct-acting, Indirect-acting, Mixed-acting
Direct-acting-
directly stimulating adrenergic receptors (epinephrine, norepinephrine)
Indirect-acting-
stimulating the release of norepinephrine (amphetamine)
Mixed-acting-
doing both directly the adrenergic receptors and release of norepinephrine (ephedrine)
Produce sympathetic response
Catecholamines
Catecholamines types
Endogenous and Synthetic
Endogenous
Epinephrine, norepinephrine, dopamine
Synthetic
Isoproterenol, dobutamine
all synthetic
Noncatecholamines-
Stimulate adrenergic receptors
Noncatecholamines-
Most have longer duration of action than catecholamines
Noncatecholamines-
Phenylephrine, metaproterenol, albuterol
Noncatecholamines-
Chemical structure or a substance-
endogenous (body makes it) or synthetic (artificially) produces a sympathomimetic response
Epinephrine (Adrenaline) is
nonselective
Epinephrine (Adrenaline) action
Alpha1 increases the blood pressure.
Beta1 increases heart rate.
Beta2 promotes bronchodilation.
Epinephrine (Adrenaline) contraindications and caution
Cardiac dysrhythmias, hypertension
Hyperthyroidism, diabetes mellitus
Pregnancy
Catecholamine, non-selective adrenergic agonist- effects multiple things
Pupil dilation
Epinephrine (Adrenaline)
Inotropic- increasing the force of the cardiac output and contraction
Vasoconstrictor
Bronchodilator
Epinephrine (Adrenaline) action
Epinephrine (Adrenaline) uses
Anaphylaxis, anaphylactic shock
Bronchospasms, status asthmaticus
Cardiogenic shock, cardiac arrest
Goal with shock, because of non selectivity
Epinephrine (Adrenaline)
Producing several different desired effects on one person
Epinephrine (Adrenaline)
Drug of choice for anaphylaxis, bronchospasms if no other choice
Epinephrine (Adrenaline)
Epinephrine (Adrenaline) side effects/adverse reactions
Cardiac dysrhythmias, palpitations
Tachycardia, hypertension
Dizziness, headache, sweating
Insomnia, restlessness, tremors
Hyperglycemia
Epinephrine (Adrenaline) Drug interactions
Beta blockers (antagonist, blocks beta receptors)
Decrease epinephrine action
Digoxin
Causes cardiac dysrhythmias
TCAs and MAOIs intensify and prolong effects
Renal vasocontraction- less circulation and blood flow to kidneys effects excretion (output)
Epinephrine (Adrenaline)
Monitor for urinary output
Epinephrine (Adrenaline)
IV epinephrine extravasation
Blocks alpha receptors relaxing vascular smooth muscle & increasing blood flow to area
Epinephrine (Adrenaline) antidote
phentolamine mesylate (blocker receptors)
If epinephrine leaks out into tissues it causes significant tissue damage causing necrosis within only 12 hours
Make sure IV lines are patent
Causes constriction to the tissue area
IV epinephrine extravasation
Albuterol is
Selective
Acts on beta2-adrenergic receptors
Promotes bronchodilation
Albuterol
Albuterol uses
Treats bronchospasm, asthma, bronchitis, COPD
Albuterol caution
Severe cardiac disease
Hypertension, hyperthyroidism
Diabetes mellitus, pregnancy
Renal dysfunction
Selective drugs =
fewer side effects
If high doses= can increase the sensitivity
Albuterol
Stimulates the livers= glycogenolysis= increase in blood glucose
Albuterol
Albuterol side effects/adverse reactions
Tremors, nervousness, restlessness
Dizziness, tachycardia
Palpitations, cardiac dysrhythmias
Albuterol drug interactions
May increase effect with other sympathomimetics, MAO inhibitors, and tricyclic antidepressants
Antagonize effect with beta blockers
Getting other drugs like a beta blocker cannot take
albuterol
Adrenergic Agonists assessment
baseline vital signs, other drug history, baseline glucose (increases glucose)
Adrenergic Agonists Nursing Interventions
monitor IV site
administering antagonist if necessary
document vital signs
monitoring EKG
reporting and documenting any side effects
urinary output (adequate hourly or bladder distention)
offer food to avoid nausea
Adrenergic Agonists Education
about epi pen, follow up after ER, effects more than one body effect, side effects, adverse effects
Central-Acting Alpha Agonists
Clonidine, Methyldopa
Selective alpha2-adrenergic agonist
Used primarily to treat hypertension
Clonidine
Produce vasodilation by stimulating alpha 2 receptors in the Central Nervous System
Clonidine
Clonidine Main side effects-
bradycardia, hypotension, sedation, and dry mouth
decreasing in the sympathetic outflow to reduce peripheral resistance (CNS)
Methyldopa
Alpha-adrenergic agonist that acts within the CNS
Methyldopa
Alpha2 activation leads to vasodilation and decreased BP
Methyldopa
Methyldopa Side effects
Drowsiness, headache, nasal congestion
Nightmares, edema, constipation
Ejaculation dysfunction
Elevated liver enzymes
Does not pair well with people, a lot of side effects
Methyldopa
Block effects of adrenergic neurotransmitters
Adrenergic Antagonists
Block alpha and beta receptor sites
Adrenergic Antagonists
Directly by occupying receptors
Adrenergic Antagonists
Indirectly by inhibiting release of neurotransmitters epinephrine and norepinephrine
Adrenergic Antagonists
Adrenergic Antagonists Types
Alpha-adrenergic antagonists
Beta-adrenergic antagonists
Drugs that inhibit a response at alpha-adrenergic receptor site
Alpha Adrenergic Antagonists
Alpha Adrenergic Antagonists: Selective
Block alpha1
Alpha Adrenergic Antagonists: Non-selective
Block alpha1 and alpha2
Alpha Adrenergic Antagonists: Action
Promote vasodilation, decreasing BP
Alpha Adrenergic Antagonists; Use
Decrease symptoms of BPH, PVD
Orthostatic hypotension = risk factor
Alpha Adrenergic Antagonists
Can treat peripheral vascular disease- vasodilate
Alpha Adrenergic Antagonists
Reynolds disease- tight constriction of blood vessels in hands when it gets cold- helps vasodilate
Alpha Adrenergic Antagonists
Beta-Adrenergic Antagonists Action
Decrease BP and pulse
needed to be used with caution with COPD, asthma, chronic bronchitis
Nonselective beta blockers-
Nonselective beta blockers blocks beta 1
Decrease BP and pulse
Nonselective beta blockers blocks beta 2
Bronchoconstriction
Use with caution in patients with COPD or asthma
Nonselective beta blockers: Propranolol HCl, uses
Angina, cardiac dysrhythmias, hypertension, heart failure
Metoprolol, atenolol
Selective beta blockers
Blocks beta1 only
Decrease BP and HR
Fewer side effects
Selective beta blockers
Selective beta blockers: Encourage pts to report side effects/adverse reactions related to heart
Bradycardia, hypotension, dysrhythmias
Headaches, dizziness, fainting
Fatigue, drowsiness, depression
Nausea, vomiting, diarrhea
Heart failure
Decreased libido and impotence
(HF)
Specific of the heart, blocking receptors involving BP and HR
Fewer side effects
Masks S/Sx of hypoglycemia- watch blood sugars
Selective beta blockers
Decreased effects with
NSAIDs- decreased effects in beta blocker
Beta-Adrenergic Blockers Drug interactions
Increased effects with
Atropine and other anticholinergics- increased effect too much of parasympathetic
Beta-Adrenergic Blockers Drug interactions
Increased risk of hypoglycemia with
Insulin, sulfonylureas
Beta-Adrenergic Blockers Drug interactions
Cause can increased or decreased effects
Beta-Adrenergic Blockers Drug interactions
Adrenergic Neuron Antagonists: Blocking the neuron release of norepinephrine
Used to decrease BP
Reserpine: closely resembles an alpha and beta adrenergic beta blocker
Blocking the neuron release of norepinephrine example
Reduces the serotonin and catecholamine transmitters. Depletion of these neurotransmitters may lead to severe mental depression
Blocking the neuron release of norepinephrine example
Herbal supplement that interacts with everything= st johns wart, hypertensive crisis
Need to know what they are taking before giving this
Adrenergic Neuron Antagonists
Adrenergic Neuron Antagonists Assessment
vital sign and ekg baseline, med history, health history,
Adrenergic Neuron Antagonists nursing interventions
monitoring BP and HR, report and document side effects or complaints of dizziness, chest pain, assisting change of positions because of ortho
Adrenergic Neuron Antagonists Education
may take 2-3 weeks for the med to be effective and keep a log of vital signs, rising slowly, avoid operating heavy machinery until any potential drug effects are known
When teaching a patient who has been prescribed metoprolol about side/adverse effects, which is the highest priority teaching point?
Instruct the patient how to take a pulse.
Stimulation of which adrenergic receptor results in dilation of vessels and decrease in blood pressure?
Alpha2
The nurse is teaching the patient about the side effects of propranolol. These include
bronchospasm.- do not give to asthma or copd
A nurse is administering epinephrine to a patient during a cardiac arrest. The primary desired action of this medication is to
stimulate a heart rate.
A patient is receiving epinephrine intravenously. Which drug should the nurse have available to treat extravasation and tissue necrosis?
Phentolamine mesylate
Vitamin definition
Needed to compose and comprise different things of out body, can get them synthetically or naturally, tissue growth and healing.
Populations in need of increased vitamins
rapid body growth, inadequate diet, malabsorptive issues, pregnant and breast feeding, chronic illness, and restrictive diet
Fat-soluble vitamins-
A,D, E and K- stored in the fatty tissue, excreted at a lower rate. Too much of the vitamins= toxicity because it cannot be excreted like a water soluble vitamins
Water-soluble vitamins-
vitamin b complex, C, B12 and folic acid. Not stored in the fat. Faster excretion in the kidneys because it is water.
If a well balanced diet should acquire all of the
vitamins and minerals
Vitamin A Function
Bone growth, skin, eyes, and hair maintenance
Vitamin A Food Source
milk, butter, eggs, leafy greens veggies, yellow and orange veggies
Vitamin A Deficiency
Night blindness, corneal ulceration, skin lesions, dysfunction of mucous membranes
Vitamin A excess doses
Liver damage, hair loss, peeling skin, GI upset, lethargy
Too much vitamin A in pregnancy can cause too much harm for
the fetus
Vitamin D function
Regulates calcium & phosphorus metabolism
Vitamin D food sources
Carbsterginroe, salmon, evaporated milk
Vitamin E function
Antioxidant properties
Protects cellular components from being oxidized and RBCs from being hemolyzed
Vitamin E food sources
green leafy vegs, sweet potato, papaya, mango, nuts, seeds
Vitamin E deficiency
Increased breakdown of RBCs
Vitamin E excess doses
Fatigue, GI upset, HA, breast tenderness, bleeding- prolonging the prothrombin time
Vitamin E interaction
Iron- interferes with the absorption of vitamin E
Vitamin K function
Synthesis of prothrombin and clotting factors
Vitamin K food sources
green leafy veggies
Vitamin K deficiency
Spontaneous hemorrhage
Vitamin K excess doses
Blood clotting time too quick, risk for stroke, HA, occlusion, decreased circulation
Babies are vitamin K deficient-
vitamin K1 (phytonadione) shot for clotting- within in first 1 hour in life
Can be used for clotting antidote- warfarin
vitamin K
Adapt warfarin dose if they eat
spinach
Vitamin B Complex
B1—thiamine
B2—riboflavin
B3—nicotinic acid or niacin
B6—pyridoxine
B1—thiamine-
given to alcoholic patients (AUD)
B1—thiamine- deficiencies
Polyneuritis (peripheral nerves), cardiac pathology(dysrhythmias, HA), edema, neurologic disorders, ataxia(impaired coordination), diplopia(double vision), alcoholism
B2—riboflavin-
given to manage dermatologic problems, larger doses to treat migraines
B2—riboflavin- deficiencies
Sore throat, cheilosis, skin cracks at corners of the mouth, migraines, dry skin
B3—nicotinic acid or niacin-
Given for Hyperlipidemia
B3—nicotinic acid or niacin- Deficiencies-
Hyperlipidemia, Pellagra(inflammation of areas that are exposed to the sun), diarrhea, mouth sores, skin redness(flushing)
B6—pyridoxine-
Given for B6 deficiency because of inadequate diet. If they cannot metabolize B6. energy
B6—pyridoxine- deficiencies
Neuritis, seizure, anemia, depression, confusion, seborrheic dermatitis
Water soluble vitamins
Usually not toxic unless taken in extreme amount
Vitamin B Complex
Vitamin C function
Aids in absorption of iron and conversion of folic acid
Increases wound healing and tissue repair
Protein and lipid synthesis
Vitamin C food sources
citrus fruits
Vitamin C deficiency
Scurvy- poor wound healing, bleeding gums, abnormal bone and tooth development
Vitamin C excess doses
GI upset, crystalluria (aspirin interaction), decreased effects of oral anticoagulants
Folic Acid (Folate) function
Essential for body growth
Needed for DNA synthesis
Folic Acid (Folate) Food sources-
legumes, asparagus, eggs, leafy green veggies, fortified cereals
Folic Acid (Folate) Deficiency
GI upset, stomatitis, fatigue, alopecia
Leukopenia, thrombocytopenia, neural tube defects
Folic Acid (Folate) Excess doses: Increased risk for seizures
Can lower phenytoin levels
Mask vitamin B12 deficiency
Most a risk population- older adults
Babies in the womb- pregnant women and planning on becoming pregnant take it to prevent neural tube defects
Folic Acid (Folate)
Vitamin B12 function
Essential for DNA synthesis
Aids in conversion of folic acid to its active form
RBC development, Myelin integrity
Intrinsic factor- gastric cells that is necessary for vitamin b12 absorption. If not they can get pernicious anemia
Vitamin B12
Vitamin B12 food sources-
Clams, liver, fish, king crab, beef, fortified cereals
Vitamin B12 Deficiency
Paresthesia, weakness, fatigue
Anorexia, loss of taste, diarrhea
Memory loss, mood changes
Poor growth, Psychosis, megaloblastic anemia (RBCs become too enlarged to function properly, cannot circulate or carry o2)
Vitamins Assessment
Assess for diet history, blood serum levels of the vitamins- know their baseline
Vitamins Nursing Interventions
administer vitamins with food for absorption, monitory blood levels for deficiencies or overdoses
Vitamins Education
Teaching pts about vitamin safety, keep vitamin containers to keep out of light
Educate about foods in their environment
Discourage taking large doses over long period to time
Minerals
Iron, Copper, Zinc, Chromium, Selenium
Iron function
Vital for Hgb regeneration
Iron Food sources-
Liver, lean meats, egg yolks, dried beans, spinach, fruit
Iron Deficiency
Anemia, fatigue, weakness, shortness of breath, pallor, GI bleeding
Iron toxicity- risk for
Child populations
Iron toxicity
Hemorrhage, shock, can be fatal in 12-48 hours
Educate pts if they have kids and they are taking iron put the containers out of reach
Main causes of anemia
Pregnant women should take an __ supplement
iron
___ slows the absorption of iron
Food and antacids
___ increases absorption of iron
Vitamin C
Copper Function
Needed for formation of RBCs and connective tissue
Neurotransmitter production
Copper Food sources-
shellfish, liver, nuts, seeds, legumes, coco
Copper Deficiency
Anemia, decrease in WBCs (infection risk)
Decrease in skin and hair pigmentation
Glucose intolerance, intellectual disabilities(young populations)
Copper Excess
Wilson’s disease- error in body metabolism of copper
Too much can Accumulate in the liver, kidneys, brain and cornea
Zinc Function
Growth, appetite, testicular maturation, skin integrity, mental activity, wound healing, immunocompetence
Zinc Food source-
beef, lamb, eggs, potatoes, carrots
Zinc Deficiency
Weight loss, unhealing wounds, lack of alertness, decreased smell and taste, diarrhea, loss of appetite. Associated with diets High unrefined cereal, unleavened bread, TPN, intestinal disease, alcoholism, and pregnancy
Zinc Excess doses
Copper deficiency
Decrease in HDL cholesterol
Weakened immune system
Most common deficiency in someone who is on total parental nutrition, lost in the stool
Zinc
Help with immune system (colds)
Zinc
Can Inhibit absorption of antibiotics
Zinc
Nasal spray can have zinc and cause a loss of smell in nasal passage
Zinc
Chromium Function
Carb, lipid, and nucleic acid metabolism
Chromium Food sources-
meat, whole grain cereals, brewers yeast
Chromium Deficiency
Low blood sugar, dizziness, sleepiness, craving for sweet food, excessive thirst. Common in diets with High in refined foods and TPN
Chromium excess doses
GI bleeding, coagulopathy, seizures, pulmonary dysfunction
Selenium Function
Reproduction, thyroid hormone metabolism, DNA synthesis
Selenium Food sources-
liver, seafood, poultry, grains
Selenium Deficiency
Hypothyroidism, muscle weakness, myalgia, increased RBC fragility, pancreatic degeneration, pseudo albinism
Selenium Excess doses
Weakness, GI upset, hair loss, dermatitis
Garlic-like odor from skin and breath
Iron Assessment-
Diet, drug history, when, watching for anemia
Iron Education-
educating proper diet to make sure there is enough iron, could be administering iron (IM). Advise to increase fluids, activity, and increase fiber bulk to avoid constipation
Iron toxicity is a serious cause of poisoning in children. It may be fatal because of an ulcerogenic effect, resulting in which of the following?
Hemorrhage
Which does the nurse identify as signs and symptoms of vitamin A toxicity? (Select all that apply.)
Hair loss
Lethargy
Vomiting and diarrhea
A patient is admitted to the emergency department after taking high doses of vitamin B and vitamin D. The nurse is more concerned about the vitamin D because
vitamin D is fat-soluble.
A patient with pernicious anemia most likely has a deficiency of
vitamin B12.
A patient is taking iron supplementation. It is most important for the nurse to instruct the patient to
increase fiber and fluid intake to avoid constipation.
Drugs that stimulate the PNS
Cholinergic Agonists
Cholinergic receptors
Muscarinic
Nicotinic
Muscarinic receptors-
smooth muscles like the heart, slow HR
Nicotinic receptors-
effecting skeletal muscles
Types of cholinergic agonists- stimulating parasympathetic response
Direct acting
Indirect acting
Direct acting-
act on the receptors to activate the tissue response
Indirect acting-
inhibit the action of the enzyme cholinesterase (breaking down acetylcholine, inhibits reaching receptor sites) can be reversible or irreversible
Mimicking the parasympathetic system
Cholinergic Agonists
PNS is called cholinergic - end of the neurotransmitters innervates the muscle
with acetylcholine
Produce responses opposite to each other – epinephrine increase- cholinergic
decreases hr
Effects of Cholinergic Agonists: Eyes
Constricts pupil
Effects of Cholinergic Agonists: Lungs
Constructs bronchioles and increase secretions
Effects of Cholinergic Agonists: Heart
HR decreases
Effects of Cholinergic Agonists: Blood vessel
dilates
Effects of Cholinergic Agonists: Gastrointestinal
increases peristalsis and secretions
Effects of Cholinergic Agonists: Bladder
contracts
Effects of Cholinergic Agonists: Salivary gland
increased salivation
Rest and digest system
Normal homeostatic bodily functions
Cholinergic Agonists
Primarily selective to muscarinic receptors
Direct-Acting Cholinergic Agonists
Muscarinic receptors located in smooth muscles
Direct-Acting Cholinergic Agonists
Metoclopramide
Pilocarpine
Bethanechol chloride
Direct-Acting Cholinergic Agonists
Metoclopramide
Used to increase gastric emptying
Treats gastroparesis, nausea, GERD
Pilocarpine
Tx glaucoma due to relief of intraocular fluid pressure
Used to constrict pupils (used during eye surgery exams), pupils constrict miosis), dry up oral secretions associated with radiation Txs
Bethanechol chloride
classic cholinergic agonist
Used to increase urination, unincary retention problems
Selective muscarinic receptors
GI and GU tract, glands and the heart-
Bethanechol Side effects/adverse reactions (overstimulation of the parasympathetic system)
N/V/D
Hypersalivation
Diaphoresis
HA
Dizziness
Flushing
Urinary urgency/frequency
Bronchoconstriction/Increased bronchial secretions
Miosis (pupil constriction)
Lacrimation
Bethanechol (overstimulation of the parasympathetic system) Contraindications
Intestinal or urinary tract obstructions, IBS, severe bradycardia, hypotension, COPD/Asthma, peptic ulcer, hyperthyroidism, seizures, parksonism
If overdosed = nausea because of gastric motility
Bethanechol (overstimulation of the parasympathetic system)
Bethanechol Assessment-
normal urine output >1500 mL per day, health history (urinary obstruction, asthma, peptic ulcers),
Bethanechol Nursing Interventions-
monitoring vital sings
intake/output
give one hour before meal or two hours after meal
check liver enzymes
auscultating lungs = bronchoconstriction can develop pneumonia
if giving bed side= antidote= atropine, watching for cholinergic crisis,
Bethanechol Education-
educate about home use= orthostatic hypertension
Indirect-Acting Cholinergic Agonists Functions
Inhibit the action of cholinesterase enzyme causing more acetylcholine
Allow ACh to activate muscarinic and nicotinic cholinergic receptors
Indirect-Acting Cholinergic Agonists Effects
Skeletal muscle contraction, increased tone (contractures)
Greater GI motility, bradycardia, miosis (do not give to a pt with urinary/bowel obstruction/constipation)
Bronchial constriction, promote urination
Indirect-Acting Cholinergic Agonists Contraindications:
intestinal and urinary obstruction
Not directly acting on the receptor site
Skeletal system effect- muscle tone
Indirect-Acting Cholinergic Agonists
Reversible Cholinesterase Inhibitors Uses
Produce pupil constriction in glaucoma
Increase muscle strength in myasthenia gravis
Reversible Cholinesterase Inhibitors Examples
Neostigmine- Short acting- increase muscle strength In MG
Pyridostigmine- moderate acting, also reverse actions of muscle relaxants and treat MG
Ambenonium chloride (tensolon)- short acting, diagnosing something with MG,
Edrophonium
Physostigmine
Donepezil- treats Alzheimer diease bc decreased levels of acetylcholine
Reversible Cholinesterase Inhibitors Side effects
Muscle cramps, bradycardia, hypotension
Blurred vision, hypersalivation, seizures
Acting time frames
Short acting- increase muscle strength In MG
Asthma, diabetes, cardiac disease, obstruction of the GI or GU system= contraindications
Reversible Cholinesterase Inhibitors
Irreversible Cholinesterase Inhibitor
Potent agents due to long-lasting effects
Main use is to produce pupillary constriction
Does not undo action
Anticholinergics Action
Inhibit action of ACh by occupying ACh receptors
Cholinergic Antagonists
Anticholinergics
Effects of anticholinergics heart
Large doses increase HR; small doses decrease HR
Effects of anticholinergics lungs
Bronchodilation, decrease secretions
Effects of anticholinergics GI
Relax smooth muscle tone, decrease motility and peristalsis, decrease secretions
Irritible bowel syndrome treatment
Salivation decrease
Dilation of pupils
Similar to adrenergic agonist
anticholinergics
Effects of anticholinergics GU
Relax detrusor muscle, increase sphincter constriction
Effects of anticholinergics Eye
Dilate pupils, decrease accommodation
Effects of anticholinergics Glands
Decrease salivation and perspiration
Effects of anticholinergics CNS
Decrease tremors and rigidity of muscles (Parkinson meds)
Atropine
Anticholinergics
Atropine action
Increase heart rate
Decrease GI motility, spasms, peristalsis, salivary and gastric secretions
Atropine Side effects/adverse reactions
Tachycardia, photophobia, headache, blurred vision
Abdominal distention, nausea, constipation
Dry mouth and skin, decreased sweating
Urinary retention, impotence
Palpitations, dysrhythmias
Contraindicated in glaucoma
Atropine
Main use= increase HF in bradycardia, can use preoperatively to decrease secretions to decrease aspiration during anesthesia
Atropine
Nerve block= can be used as a reversal agent
Atropine
Dilate pupils or ocular exams
Atropine
Serves as antidote for cholinergic drugs
Atropine
Can be used in liquid drops- hospice setting, dry up secretions (death rattle)
Atropine
Cant see, pee, spit, poop
Atropine
Atropine Assessment-
obtain baseline vital signs (bradycardia), urine output, contraindications
Atropine Nursing Interventions-
determining fluid intake and output, assessing bowel sounds, decreasing motility- paralytic ileus
Atropine Education-
constipation
mouth care (secretions, without it can cause infections, cracks)
if diagnosed with glaucoma talk to HC provider to stop
avoiding hot environments= not as much sweating= body cannot thermoregulate as well, increase fluid and fiber
Watching urine output, can use eyedrops, hard candy, ice or gum to help moisten mouth
Antiparkinsonism–Anticholinergics
Benztropine
Benztropine Main Action
Decreases involuntary movement, tremors, muscle rigidity
Benztropine Use
Parkinson’s disease- caused by imbalance of dopamine and acyetylcholine
Pseudoparkinsonism
Blocks action of acetylcholine
Benztropine
Benztropine Side effects
Tachycardia, headache
Blurred vision, ocular hypertension
Dry mouth/skin, constipation
Urinary retention
Contraindications
Glaucoma= ocular hypertension, constriction
Tardive dyskinesia
Benztropine
Anticholinergics for Treating Motion Sickness, Antihistamine
Scopolamine
Treats motion sickness, nausea, vomiting
Transdermal patch delivers dose over 3 days
Scopolamine
Scopolamine Side effects
Tachycardia, hypotension
Dry mouth, constipation
Blurred vision, flushing
Muscle weakness, drowsiness
Urinary retention
Educate- hand hygiene
Wear gloves
Scopolamine
A patient has received atropine. It is most important for the nurse to assess the patient for which effect?
C. Urinary retention
A nurse has just administered atropine to a patient. It is most important for the nurse to assess the patient for the development of which effect?
Tachycardia
A patient is ordered to receive bethanechol chloride for urinary retention. Which health condition would serve as a contraindication for this medication?
Asthma
A patient received atropine as a preoperative medication 30 minutes ago. The nurse evaluates the medication as effective if the patient states,
“My mouth feels dry.”
A patient is prescribed scopolamine. It is most important for the nurse to assess the patient for a history of which condition?
Glaucoma
Atropine is most useful in the treatment of which cardiovascular condition?
Sinus bradycardia
Insomnia-
Inability to fall asleep or remain asleep. More commonin female populatiom
Stages of Sleep
REM and NREM
REM-
rapid eye movement, most vivid dreams that they can recall the best.
NREM-
non rapid eye movement- 4 stages and then it ends in REM
Occurs in 90 minute intervals
If the cycle is interrupted it starts over
Stages of Sleep
If they experience REM and NREM they are able to
perform better
Nonpharmalogical management
Arise at specific hour in morning
Limit daytime naps to avoid tiredness
Avoid caffeine, alcohol, and nicotine 6 hr before bedtime
Avoid heavy meals, large amounts of fluids, loud noise, and strenuous exercise before bedtime
Take warm bath, read, listen to quiet music, or drink warm milk before bedtime- relaxation techniques
Sedatives:
calm or slow brain activity, diminish physical and mental response of the person. If increase the dose it can produce a hypnotic effect
Hypnotics:
cause sleep
Short-acting Hypnotics:
Help to fall asleep and produces less drowsiness effect in the morning
Intermediate-acting- Hypnotics:
keeping someone asleep, staying asleep, more drowsiness effect in the morning
OTC sleep aids- primary ingredient
Antihistamines (diphenhydramine)
Pharmacological management
Most commonly prescribed- Sedatives and Hypnotics
Sedative-Hypnotics General side effects
Residual drowsiness (hangover)
Vivid dreams, nightmares
Drug dependence- have to have it
Drug tolerance- increase dose
Excessive depression-
Respiratory depression- too much of med
Hypersensitivity
Hypnotic therapy= short term event, don’t wanna create
dependence or tolerance
Abruptly stopping a hypnotic=
withdrawal symptoms
Respiratory disorders avoid
hypnotics
Barbiturates Classified by length of action
Long-phenobarbital(seizures)
intermediate-maintain long periods of sleep(Butabarbital)
short- procedure sedation, closely monitor vital signs,
ultrashort- sleep
Restrict to short-term use: 2 weeks or less
Barbiturates
Barbiturates Interactions
Alcohol, opioids, other sedative-hypnotics
Decreases effects of oral anticoagulants, glucocorticoids, tricyclic antidepressants, quinidine
Sleep- restricted time frame
Barbiturates
Scheduled 2 meds
short acting
Schedule 3 meds
Intermediate-
Schedule 4 med
Long acting-
Benzodiazepines used as hypnotics:
Flurazepam, alprazolam
Temazepam, triazolam
Estazolam, quazepam
For sleep disorders and anxiety (more common)
Lorazepam and diazepam
Benzodiazepines action
Interacts with neurotransmitter GABA to reduce neuron excitability
Benzodiazepines Use
Reduce anxiety, treat insomnia
Lam or pam
Short term use drugs
Can treat insomnia
To decrease excitability of the neurons
Benzodiazepines
Benzodiazepines Assessment-
throughout drug history, complementary or alt medications. History-insomnia, anxiety. Renal function- low levels= prolong drug action
Benzodiazepines Nursing Interventions-
continue to monitor vital signs, watching for adverse effects, bed alarm for fall risk.
Benzodiazepines Education-
Encourage to avoid alcohol, antidepressant, antipsychotics, and opioids if on a benzodiazepine
If take alcohol on a benzo they cannot remember an action
They cannot decide just to not take it anymore- can cause painful and dangerous withdrawal effect
Educate- do not operate machinery, driving cars, risk
Benzodiazepines
Zolpidem
nonBenzodiazepines
Zolpidem Action
Neurotransmitter inhibition
Duration of action is 6 to 8 hours
Zolpidem Use:
Treat short-term (less than 10 days) insomnia
Differes in the chemical structure
Schedule 4 drug- tolerance and dependence can occur
If given to an older adult the dose should be decreased
Zolpidem
Sedative-Hypnotics (Non-Benzodiazepines) Assessment-
Obtain vital signs, labs, drug history
Sedative-Hypnotics (Non-Benzodiazepines) Education-
don’t take it with food- slows the absorption process, takes longer to work.
Avoid alcohol, opioids, antidepressants.
Take it 30 mins before bed time.
Suggesting to empty bladder before bed. Use caution if they drive (do not)
Ramelteon
Melotonin Agonists
First FDA-approved hypnotic not classified as a controlled substance
Ramelteon
Selectively targets melatonin receptors to regulate circadian rhythm to treat insomnia
Ramelteon
Not been shown to decrease REM sleep
Ramelteon
Use nonpharmacologic methods first
Sedatives and Hypnotics for Older Adults
Ramelteon Adverse effects/side effects
Drowsiness, dizziness, fatigue, headache, nausea, and suicidal ideation (nsg interventions)
Sedatives and Hypnotics for Older Adults Short to intermediate-acting benzodiazepines
Estazolam
Temazepam
Triazolam
Sedatives and Hypnotics for Older Adults Avoid long-acting benzodiazepines
Flurazepam
Quazepam
Diazepam
Main goal- nonpharmacological intervention
What is causing the sleep disorder
Barbiturates should not be used in older adults due to cns side effects
Use benzodiazepines for older adult- no longer than 4 weeks (tolerance, dependence)
Most common- frequently wake up, (pee, pain)
Sedatives and Hypnotics for Older Adults
Which nursing intervention would be most appropriate for a patient taking temazepam?
D. Tell patient to ask for help before standing.
What would indicate to the nurse that a patient taking a sedative-hypnotic requires more teaching?
D. The patient requests a cup of kava kava tea to help her get to sleep faster.
An older adult complains of insomnia. Which suggestion would be most appropriate for the nurse to provide as an initial method to deal with this issue?
B. “Drink warm milk or chamomile tea before bedtime.”
A patient is taking a hypnotic nightly to enhance sleep. The patient experiences vivid dreams and nightmares. This may be associated with
D. REM rebound.