final exam Flashcards
Pharmacokinetics/pharmacodynamics
pharmacokinetics: what the body does to the drug
pharmacodynamics: what the drug does to the body
Drug names – generic and brand name
generic: cheaper, no capital letter, same chemical ingredient (may have different talc/ flavoring)
brand: name given, time-limited patent, capital letter
Agonist vs. Antagonist
agonist: mimic ligand-receptor activation response
antagonist: block the receptors activation response
Food and Drug Administration (FDA)’s role with medications
organization that protects public health, develops new drugs, black box warnings
Black Box Warning
warning issued by the FDA for drugs and medical devices that have serious or life threatening side effects
Drug Enforcement Agency (DEA)
enforces controlled substance laws and regulations, drug diversion
Scheduled Medications/Controlled Substances
categorized by schedule (I-V) therapeutic, potential abuse, nursing duties for storage, administration, and record keeping
the different schedules
schedule 1 has no current medical use for the medication, ex: heroin.
schedule 2 has a high potential for abuse and are considered dangerous, ex: Vicodin.
schedule 3 has a moderate to low potential for abuse, ex Tylenol with codeine.
schedule 4 is low potential for abuse and low risk for dependence, ex: Xanax. schedule 5 has minimal potential for abuse, ex: Lomotil
Medication administration – 5 rights
right dose, right patient, right route, right time, and right medication
High Risk Medications (APINCH)
A: anti-infective, P: potassium/ other electrolytes, I: insulin, N: narcotics, C: chemotherapeutic agents, H: heparin/ anticoagulants
Medication errors and how to prevent
errors: information management in health records, unrecognized patient deterioration, implementation of clinical support, fatigue, interruption, multitasking, emotional stress and how to prevent: patient transfer, patient identification, system factors, know medicines, patient education, double check
Antibiotic resistance
occurs when bacteria change and are no longer affected by antibiotics, which are designed to kill them. This can happen through a variety of mechanisms
Penicillin’s
Effective againest: i. Gram (+) and Gram (-) bacteria
treats: Pneumonia,Meningitis, Otitis Media,Strep Throat, Syphilis
Common penicillin medications-
i. Amoxicillin
ii. Penicillin V
d. Contraindications
i. Allergies to penicillin or cephalosporins
e. Adverse Effects-
i. Most significant = GI distress
ii. Superinfections: yeast infection or C.Diff
iii. Severe: hypersensitivity or anaphylaxis
f. Drug–Drug Interactions-
i. Tetracyclines
ii. Warfarin
g. Nursing Considerations
Evenly space dosages Monitor for signs of superinfections
Advise with birth control
Consider probiotics
Culture and sensitivity tests
Cephalosporins
MOA: Inhibit bacterial
cell wall synthesis
indication: More serious infections:
pneumonia, meningitis, kidney
SE: GI distress, bleeding, Superinfections (black/ furry tongue, yeast infection, C.Diff
NI/CE: Monitor for signs of superinfection, Interact with alcohol
CI: Renal impairment, alcohol
Sulfonamides
Medication - Trimethoprim/Sulfamethoxazole (Bactrim)
MOA - inhibits metabolic activity by preventing dihydrofolic acid formation
Indications - treat UTI, ear infection, traveler’s diarrhea, skin infection
SE - photosensitivity, crystalluria, hypersensitivity
NC - Known allergy to any sulfonamide or thiazide diuretics, encourage hydration, discuss risk for photosensitivity with sun exposure
CI - Monitor for thrombocytopenia, do not use with infants under 2 months, kidney and liver impairment
Broad-spectrum against gram positive and gram negative organisms
Fluoroquinolone’s
(Levofloxacin, Ciprofloxacin)
MOA: Inhibits bacterial DNA replication
Indications: Pneumonia, complicated urinary or skin infections
Very broad spectrum of activity. Active against most aerobic gram negative bacteria and some gram positive.
AE: Gi upset, photosensitivity, dizziness, tendon rupture, peripheral neuropathy, CNS effects, C. diff.
Macrolides
End in mycin
Drug: Azithromycin
Gram-positive and gram-negative organisms
MOA: Inhibit RNA synthesis
Indications: Respiratory infections, ear infections and Chlamydia
SE: GI upset, drowsiness, QT prolongation
Nursing Considerations: advise to take with food in GI upset
Amino glycosides
A group of powerful antibiotics used to treat serious infections.
(Used for gram negative bacterias)
Medications: Streptomycin or Gentamicin (IV or IM); Gentamicin (ophthalmic)
Indications: Streptomycin or gentamicin to treat endocarditis or abdominal infections; Gentamicin ophthalmic to treat eye infections
Pharmacokinetics: Rapidly absorbed IV or IM injection, reaching peak levels within 1-2 hours, excreted unchanged in the urine and have an average half-life of 2-3 hours, depend on the kidneys for excretion
Adverse effects: GI upset, rash, nephrotoxicity, ototoxicity
Contraindications: Renal or hepatic disease, hearing loss
Nursing considerations: Monitor peak and trough (narrow therapeutic index), peak level should be obtained 1-2 hours after administration, obtain trough level just before next dose.
Tetracycline
Medications include tetracycline and doxycycline
Indications include acne, lyme disease
Adverse effects include GI upset, C. Diff, Photosensitivity, superinfections, teeth staining in children
Contraindications include known allergy to tetracyclines, children under 8 (cause teeth staining), and pregnancy
Nursing considerations include avoid sun (photosensitivity), Avoid within 1-2 of dairy, antacids, and iron, and Decrease effectiveness of oral contraceptives
Vancomycin
Indication = treat serious gram-positive infections like MRSA
Administered IV or orally for C-Diff
AE = Nephrotoxic, Ototoxic, “red man syndrome”
NC = administer over 60 min or more (avoid rapid infusion)
Antiviral drugs (herpes and influenza)
Herpes drug- Acyclovir
Influenza drug- Tamiflu
Antifungals
Pts susceptible- AIDS, immunosuppressants, transplant surgery or cancer treatment
Clotrimazole (imidazole), PO or topical
MOA- binds to sterols (lipid in fungal cells) by disrupting ergosterol biosynthesis of CM, increasing cellular permeability and causes cell death
Indications- tinea skin infections, candidiasis infections
SE- irritation, burning, rash, swelling; liver toxicity, inhibits testosterone synthesis
CI- hepatic and renal dysfunction
Ketoconazole (imidazole), topical
MOA- alter cell replication of the fungus
Indication- tinea skin infections, cutaneous candidiasis, seborrheic dermatitis, dandruff
SE- irritation, burning, rash, swelling; liver toxicity, inhibits testosterone synthesis
Amphotoericin B
MOA- disrupt fungal CM, altering cell replication of fungus and causing cell death
Indication- very potent; serious fungal infections like systemic mycosis, fungal meningitis; last resort for protozoan infections
SE- hepatotoxicity, nephrotoxicity, ototoxicity; hypokalemia, GI upset; hearing loss and bone marrow suppression; fever, chills, arrhythmias, anemia, IV phlebitis
Autonomic Nervous System (SNS and PNS)
Maintains and regulates body function. Unconscious control. SNS = fight or flight and norepinephrine. PNS = rest and digest and acetylcholine. SNS has alpha and beta receptors. “ABCD” Alpha causes Constriction. Beta causes Dilation.
Pseudoephedrine
MOA: Shrink the nasal mucous membrane by stimulating the
alpha-adrenergic receptors in the nasal mucous membrane indication: Decrease nasal congestion related to the common cold, sinusitis, and allergic rhinitis
SE: Rebound congestion, Hypertension, Sympathetic effects
Tamsulosin
block alpha 1- receptor in the prostate, this causes relaxation of bladder
and prostate and improves urine flow. indication: Benign Prostatic Hyperplasia
SE: orthostatic hypotension and syncope (30-90 minutes after first
dose)
NI/CE: 30 mins after meal, swallow whole, monitor BP
CI: kidney and liver problems, low BP
Clonidine
Therapeutic class: antihypertensives Clonidine available forms: Epidural, tablets and transdermal injection. MOA- unknown Thought to stimulate alpha2 receptors and inhibit central vasomotor centers, decreasing sympathetic outflow to the heart, kidneys, and peripheral vasculature and lowering peripheral vascular resistance,BP and HR. Adverse reactions- Bradycardia, chest pain, hypotension, tachycardia, drowsiness, dizziness, confusion, lethargy, constipation, nausea and vomiting.Nursing considerations:drug may be given to rapidly lower BP in some hypertensive emergencies, frequently monitor BPand pulse rate, Observe patient for tolerance to drugs therapeutic effects which may require increased dosage.
Metoprolol vs. Propranolol
Metoprolol and propranolol are both beta-blockers, but they differ in selectivity and uses. Metoprolol is a selective beta-1 blocker, primarily affecting the heart and causing fewer respiratory side effects, making it suitable for patients with asthma or COPD.Its commonly used for hypertension, post-heart attack care, and heart failure. Propranolol, a non selective beta blocker, affects both beta-1 and beta-2 receptors, which can impact the heart, lungs, and other organs, leading to potential bronchoconstriction, making it less suitable for people with respiratory issues. ropranolol is used for a broader range of conditions, including hypertension, migraines, and anxiety. Metoprolol has a more cardio-specific effect, while propranolol may have more pronounced central nervous system effects due to its lipid solubility.
Epinephrine
A hormone and medication, also known as adrenaline.
Drug Class: Epinephrine is an alpha and beta adrenergic agonist.
MOA: This is produced in the adrenal medulla and is stimulated by the sympathetic nervous system. Epinephrine helps open airways and causes vasoconstriction (which reduces swelling).
Indication: It can be used to treat anaphylaxis, asthma attacks, cardiac arrest, and low blood pressure.
Dobutamine
Beta-1 Agonist
MOA: Stimulates beta-1 receptors to increase heart rate, force, contractions, and velocity
Indications: cardiogenic shock and severe heart filature to increase contractility and cardiac output
Contraindications: Corn allergy if dextrose is used, history of hypertension, acute MI, sulfite sensitivity
SE/AE: Increased heart rate and blood pressure, labored breathing, angina, palpitations, and dizziness
NC: Monitor EKG blood pressure, and cardiac output
Donepezil (treatment for Alzheimer disease)
Indirect-acting muscarinic cholinergic agonist
Enhances memory in some patients with early Alzheimer’s disease
Anticholinergic Drugs
Drug: Tiotropium
Class: anticholinergics long acting
MOA: blocks acetylcholine in bronchial smooth muscles, which reduce broncho-constrictive substance release
Indication: maintenance treatment of bronchospasm associated with COPD or asthma
Side Effect: cough, drying of nasal mucosa, anticholinergic effects (dry mouth), nervousness, headache, dizziness
NI/CE: caution with any condition that would be aggravated by the anticholinergic effects of the drug (ex. parkinsons)
Drug: Ipratropium
Class: anticholinergics short acting
MOA: anticholinergic that blocks vagally mediated reflexes by antagonizing the action of acetylcholine
Indication: maintenance treatment of bronchospasm associated with chronic obstructive pulmonary disease; treatment of seasonal allergic rhinitis as a nasal spray
Side Effect: nervousness, dizziness, headache, GI distress, cough, palpitations
Drug: Scopolamine
Class: Anticholinergic
MOA: blocks ACh receptors in vestibular system
Indication: nausea and vomiting associated with motion sickness/surgery
Side Effect: anticholinergic effects, decreased GI motility, urinary retention
NC/CE: Do not cut patch, Apply to hairless skin behind ear for 3 days or apply the night before surgery and remove 24 hours later, remove before MRI
Contraindications (CI): glaucoma
Drug: dicyclomine
Class: Anticholinergic
Indication: Irritable Bowel Syndrome
Side Effect: drowsiness, constipation, dry mouth
NC/CE: oral
Anticholinergic effects and SLUDGE effects
SLUDGE effects: Sweating, salivation, lacrimation, urination, diaphoresis, gastrointestinal cramps/pain, and emesis.
Make up of Nervous System (CNS and PNS) and function of nervous system
The CNS includes the brain and spinal cord, while the peripheral nervous system consists of everything else. The CNS’s responsibilities include receiving, processing, and responding to sensory information
Disorders of the CNS and basic understanding of each
Vascular disorders, such as stroke, transient ischemic attack (TIA), subarachnoid hemorrhage, subdural hemorrhage and hematoma, and extradural hemorrhage.
Benzodiazepines
MOA: Act in the limbic system and the RAS, make GABA more effective, lower doses assist with anxiety, higher doses cause sedation and hypnosis
Indication: Anxiety disorders, alcohol withdrawal, hyperexcitability and agitation, status epilepticus, preoperative relief of anxiety and tension to aid in balanced anesthesia
sedation and hypnosis
Drug: lorazepam
AE: respiratory depression, sedation, drowsiness, lethargy, hypotension
Contraindications: Allergy to benzodiazepine, Psychosis, Acute narrow angle glaucoma
Shock, Coma, Acute alcohol intoxication, Pregnancy
Education: caution when driving, risks for falls, avoid alcohol, caution with elderly, risk for dependence and overdose
(metabolized in the liver, excreted in the urine)
CNS Stimulant (ADD/ADHD)
Methylphenidate (Chapter 8, Week 6 ppt)
- MOA: stimulates the brain and blocks reuptake of norepinephrine and dopamine
- IN: ADHD, ADD
- Side effects: cardiovascular events, HTN, headache, insomnia, abuse and dependence
- Considerations: potential for abuse, CV and psychiatric risk, HTN