Nursing Process, Clinical Judgment, and Pharmacology Basics

Administrative Policies & Course Expectations

  • Syllabus Requirements:

    • The syllabus is uploaded to D2L.
    • Every student must sign, acknowledge, and upload the signed syllabus to the designated Dropbox.
    • Mandatory Requirement: Failure to submit the signed syllabus acknowledgment to the Dropbox prevents the student from sitting for Exam 1. Missing Exam 1 for this reason results in taking the makeup Exam 1 during week 15.

  • Classroom Punctuality & Door Policy:

    • Classroom doors are shut promptly at the scheduled start time.
    • Once the door is shut, late entry is strictly prohibited, especially on examination days.
    • Rationale: Late arrivals create significant disruptions for the entire class.

  • Exam Reviews & Academic Support:

    • Weekly exam reviews are conducted following examinations, subject to classroom availability.
    • Students seeking 1-on-1 exam reviews must proactively email the instructor to schedule an appointment early in the semester.
    • Students must take charge of their own education rather than waiting until late in the term (e.g., week 9 or 10) when academic performance is severely compromised.

Introduction to Clinical Pharmacology

  • Definitions & Scope:

    • Pharmacology: The broad study of the physical and chemical effects of drugs on living organisms.
    • Clinical Pharmacology: The specific application of pharmacology as it relates to nursing practice, patient care, and disease processes.
    • Medications / Drugs: Chemical agents introduced into the body that induce physiological changes.

  • Nurse's Role & Patient Safety:

    • The nurse serves as the final line of safety between the patient and a potential medication error.
    • Core Responsibilities Prior to Administration:
      • Understand the drug's mechanism of action and reason for administration. A nurse must never administer a drug without knowing its therapeutic indication (which can be looked up in 15 seconds).
      • Verify the correct administration route and technique (e.g., intramuscular, subcutaneous, intradermal).
      • Identify expected therapeutic actions (e.g., administering ibuprofen for pain and discomfort relief).
      • Recognize abnormal, dangerous, or toxic adverse effects.
      • Incorporate the nursing process continuously to monitor patient safety and treatment efficacy.

  • Healthcare Trends:

    • Inpatient hospital stays have shortened significantly over recent decades (e.g., a stay that historically lasted 10 days is now reduced to a 3-day stay), placing greater emphasis on post-discharge education and outpatient monitoring.

Sources of Medications

  • Natural Sources:

    • Plants:
      • Opium poppy: Source of opiates/opioids.
      • Foxglove plant: Source of digoxin.
      • Cannabis (marijuana) plant: Source of dronabinol, used to treat chemotherapy-induced nausea and vomiting.
      • Advantage: Purifying active compounds from plants into standardized formulations minimizes adverse effects compared to ingesting raw plant matter.
    • Animal Products:
      • Historically, insulin was harvested directly from pork (pigs) or beef (cows).
      • Animal sources provide replacements for human biological chemicals when patients are deficient (e.g., thyroid hormone, growth hormone, insulin).
      • Modern advancements allow many animal-derived compounds to be manufactured synthetically, ensuring higher purity and safety.
    • Inorganic Compounds:
      • Naturally occurring mineral salts (e.g., aluminum, iron, fluoride).
      • Therapeutic benefits were often discovered incidentally (e.g., observing a decrease in dental caries in regions with naturally fluoridated water).

  • Synthetic Sources:

    • Utilizes genetic engineering and bio-manufacturing.
    • Bacteria such as Escherichia coli (E. coli) are engineered to produce pure, potent human medications (e.g., synthetic human insulin) safely and efficiently.

Drug Evaluation & FDA Approval Process

  • Regulatory Agency:

    • The United States Food and Drug Administration (FDA), an agency under the Department of Health and Human Services, regulates drug development, safety, and marketing.

  • Clinical Trial Phases:

    1. Preclinical Trials:
      • Tested almost exclusively on laboratory animals.
      • Evaluates therapeutic effects, safety margins, and toxicity on living tissues.
    2. Phase I Studies:
      • Tested on a small group of healthy human volunteers.
      • Volunteers are informed of potential risks; phase evaluates human pharmacokinetics, biological movement, and safety profiles.
    3. Phase II Studies:
      • Tested on a targeted sample of human patients who actually have the disease or condition the drug is intended to treat.
    4. Phase III Studies:
      • Tested across a much larger, expanded clinical population of patients with the target disease to confirm efficacy, evaluate safety, and monitor for adverse reactions.
    5. FDA Approval & Brand Naming:
      • Following successful completion of Phase III, the drug receives official FDA approval.
      • The pharmaceutical company funding the research assigns the drug a proprietary brand/trade name for market distribution.
    6. Phase IV Studies:
      • Ongoing post-marketing surveillance after the drug is released to the general public.
      • Monitors long-term effects and identifies off-label uses.

  • Off-Label Uses:

    • Clinical applications of an FDA-approved drug for indications other than those explicitly approved by the FDA.
    • Example: Minoxidil was FDA-approved as an antihypertensive medication; its off-label use for male hair regrowth (marketed under the brand name Rogaine) is now widely recognized and safe.

Drug Nomenclature & Prescription Dynamics

  • Generic vs. Brand / Trade Names:

    • Generic Name:
      • Official nonproprietary name of the drug.
      • Written in all lowercase letters (e.g., ibuprofen, acetaminophen).
      • Must be known for licensing exams (NCLEX).
    • Brand / Trade Name:
      • Proprietary name assigned by the drug manufacturer holding the patent.
      • Written capitalized, italicized, and in parentheses following the generic name (e.g., Advil, Tylenol).
      • Typically concise and easier to pronounce.

  • Patent Laws & Equivalency:

    • The company funding clinical trials holds an exclusive patent. Once the patent expires, other manufacturers can produce generic versions.
    • Generic formulations must contain the same active ingredient, strength, dosage form, and administration route as the brand name.
    • Inactive ingredients (fillers, binders) may differ in generic versions, which can occasionally alter individual patient response.

  • Dispense as Written (DAW):

    • A order written on a prescription by a provider instructing the pharmacist to dispense the trade-name drug exclusively, prohibiting generic substitution.
    • Utilized primarily when a drug possesses a narrow therapeutic window.

  • Therapeutic Window / Margin of Safety:

    • Narrow Therapeutic Window:
      • Small margin between effective therapeutic serum concentrations and toxic levels (e.g., a target concentration range of 0.50.5 to 1.51.5 units).
      • Requires precise, consistent dosing and specific brand formulations to prevent severe adverse effects or toxicity.
    • Wide Therapeutic Window:
      • Large variance between effective therapeutic concentration and toxic concentration (e.g., a margin of 0.50.5 to 2525 units).
      • Provides a substantial margin of safety with significantly lower risk of inadvertent toxicity.

Drug Legislation, Pregnancy Categories, & Controlled Substances

  • Historical Legislative Milestones:

    • 19061906: Early federal drug purity regulations initiated.
    • 19511951: Mandated that specific drug categories could not be distributed without a prescription.
    • 19901990: Direct-to-consumer advertising for prescription drugs became legal under strict federal stipulations.
      • Stipulation: Advertisements listing drug indications must also disclose potential adverse effects, precautions, and contraindications (typically presented in high-speed audio at the conclusion of commercial broadcasts).

  • Pregnancy Risk Categories (Established 19791979; Page 13, Box 1.1):

    • Category A:
      • Adequate, well-controlled studies in pregnant women have failed to demonstrate a risk to the fetus in any trimester. Safe for use.
    • Category B:
      • Animal reproduction studies fail to show fetal risk, but adequate human studies are lacking; OR animal studies show risk, but well-controlled human studies fail to demonstrate risk. Seemingly safe.
    • Category C:
      • Animal reproduction studies show adverse fetal effects, but adequate human studies are lacking. Drug should only be given if potential benefits justify potential fetal risks.
    • Category D:
      • Definite evidence of human fetal risk based on adverse reaction data from clinical trials or marketing. May be used in life-threatening situations where benefit outweighs risk.
    • Category X:
      • Studies in animals or humans demonstrate definite fetal abnormalities, congenital anomalies, or fetal demise.
      • The risk strictly outweighs any conceivable therapeutic benefit.
      • Absolute Contraindication: Strictly prohibited in pregnancy.
      • Example: Accutane (isotretinoin) requires confirmation of non-pregnancy and simultaneous use of two reliable forms of contraception prior to therapy initiation.

  • Controlled Substances Act & Schedules (Page 13, Box 1.2):

    • Enforced by the Drug Enforcement Administration (DEA), a division of the United States Department of Justice.
    • Prescribers must maintain an active DEA registration number to prescribe controlled substances for tracking prescribing patterns and preventing abuse.
    • State regulations may enforce stricter controls than federal standards.
    • Schedule I:
      • High abuse potential; no accepted medical use in the United States (e.g., heroin, LSD).
    • Schedule II:
      • High abuse potential; severe physical or psychological dependence liability; accepted medical use (e.g., narcotics, opiates, amphetamines for ADHD).
    • Schedule III:
      • Lower abuse potential than Schedule II; moderate physical dependence or high psychological dependence (e.g., non-amphetamine stimulants, weaker narcotics).
    • Schedule IV:
      • Lower abuse potential relative to Schedule III; limited dependence risk (e.g., anti-anxiety agents, non-narcotic analgesics).
    • Schedule V:
      • Lowest abuse potential among controlled substances (e.g., codeine cough syrups, specific antidiarrheals).
      • Purchasers must be at least 1818 years of age.

  • Orphan Drugs:

    • Drugs that have been discovered or developed but abandoned during clinical trials due to lack of financial viability (e.g., treating ultra-rare conditions, exorbitant production costs, or severe toxicity).
    • The Orphan Drug Act provides financial grants and incentives to pharmaceutical firms to bring these therapies to market.

Nursing Process & Clinical Judgment Model in Pharmacology

  • Framework Alignment:

    • The Nursing Process (ADPIE) aligns with the National Council Clinical Judgment Measurement Model (NCJMM) to ensure efficient, safe, and holistic care:
      • Assessment →\rightarrow Recognize Cues
      • Analysis / Nursing Diagnosis →\rightarrow Formulate Hypotheses
      • Planning →\rightarrow Generate Solutions
      • Implementation / Interventions →\rightarrow Take Action
      • Evaluation →\rightarrow Evaluate Outcomes / Continuous Re-evaluation

  • Assessment Phase:

    • Systematic collection of holistic patient data, comprising Patient History (past history and History of Present Illness - HPI) and Physical Exam.
    • Impact of Chronic Diseases: Chronic renal disease or chronic liver disease alters drug pharmacokinetics (metabolism, excretion) and pharmacodynamics.
    • Medication Reconciliation: Thorough assessment of all ingested substances:
      • Prescription medications, over-the-counter (OTC) drugs, herbal/dietary supplements.
      • Recreational/illegal drugs: Approached non-judgmentally to gather accurate health data (e.g., stating, "I need to know for your health and treatment; I am not law enforcement").
      • Alcohol consumption and smoking status.
    • Allergy Assessment: Crucial follow-up to distinguish between true allergic reactions (e.g., anaphylaxis, hives) and expected adverse drug reactions/side effects (e.g., GI upset).
    • Physical Exam: Baseline physical assessment (age, weight, physical parameters) prior to therapy initiation to evaluate future efficacy, identify cautions, or screen for contraindications.

  • Analysis & Nursing Conclusions / Diagnosis Phase:

    • Nurses analyze gathered data to establish nursing conclusions regarding actual or potential alterations in functioning.
    • Legal Scope Boundary: A nursing diagnosis is a statement from a nursing perspective and is NEVER a medical diagnosis.
    • Examples:
      • Medical Diagnosis: Chronic Obstructive Pulmonary Disease (COPD), Asthma, or Diabetes Mellitus.
      • Nursing Diagnosis / Hypothesis: Risk for Impaired Gas Exchange or Impaired Glucose Metabolism.

  • Planning Phase:

    • Prioritizing patient data, generating solutions, and establishing safe, realistic, and achievable goals/desired outcomes.

  • Implementation Phase:

    • Carrying out clinical actions via three main domains of drug therapy interventions:
      1. Medication Administration (adhering strictly to safe administration rights).
      2. Comfort Measures.
      3. Patient and Family Education.
    • Patient Education Components:
      • Drug name, required dosage, and clinical rationale.
      • Administration timing and frequency.
      • Proper storage conditions (e.g., avoiding humid environments like bathroom cabinets).
      • Substances to avoid concurrently (e.g., specific OTC drugs or foods).
      • Safety measures (e.g., childproofing).
      • Specific warnings and side effect management.

  • Rights of Medication Administration (Page 55, Box 4.2):

    • Standard rights include:
      1. Right Patient
      2. Right Drug
      3. Right Storage
      4. Right Route
      5. Right Dose
      6. Right Preparation
      7. Right Time
      8. Right Documentation

  • Evaluation Phase:

    • Continuous, dynamic monitoring of therapeutic response, adverse reactions, and drug interactions.
    • If target outcomes are not achieved, the nurse loops back to reassess, re-analyze, formulate new hypotheses, and implement alternative interventions.

Medication Errors & Safety Instructions

  • Medication Error Statistics & Epidemiology:

    • Medication errors are preventable events that carry potential or actual risks of patient harm.
    • In the year 20002000, medication errors alone caused 44,00044,000 annual deaths.
    • Mandatory reporting is enforced at institutional and national levels (monitored by dedicated FDA departments).
    • Contributing Factors to Increasing Errors: Polypharmacy driven by an aging population, widespread availability of OTC medications, alternative therapies, and rapid hospital discharge cycles (e.g., historical 10-day stays reduced to 3-day stays).

  • Patient & Parent Teaching Guidelines:

    • Adult Patient Responsibilities:
      • Maintain an updated medication list.
      • Follow specific administration instructions and properly store drugs.
      • Ask questions when uncertain (nurses must foster an approachable environment).
    • Pediatric Education Points (Page 57):
      • Never administer adult-formulated medications to children; dosage concentrations differ significantly and must be calculated based on weight.
      • Always use accurate liquid measuring devices (e.g., calibrated dosing cups or oral syringes marked in mL/teaspoons).
      • Warning: Never use household dining utensils ("the big spoon out of the drawer") as accurate measuring tools.
      • Keep all medications securely stored out of children's reach.

Challenges in Drug Therapy & Special Populations

  • Internet Information & Credibility Evaluation:

    • Patients frequently research conditions online and arrive with preset demands. Nurses must educate patients when requested therapies are misapplied or inappropriate.
    • Evaluating Website Domains:
      • .com: Commercial website focused on selling/advertising products.
      • .org: Site sponsored by an organization.
      • .edu: Accredited educational institution or university.
      • .gov: Government agency website.
      • .net: Network infrastructure component (can encompass educational or governmental entities).
    • Reliability Criteria: Ease of navigation, regular content updates, cited clinical references, and information verifiable across unaffiliated independent sources.

  • Healthcare Costs & Socioeconomic Barriers:

    • High medication costs force patients into dangerous behaviors: skipping doses, splitting tablets, or hoarding leftover antibiotics for future illnesses.
    • Nurses serve as advocates, connecting patients with community resource networks, food assistance, transportation, and cost-effective generic alternatives.

  • Geriatric Considerations & Home Care:

    • An aging population living on fixed incomes requires nurses to function as home care assessors, educators, and advocates.
    • Beers Criteria (Beers List):
      • A clinical reference listing high-risk medications for older adults.
      • Identifies drugs that pose heightened risks of adverse reactions, central nervous system depression, or falls in geriatric patients.

  • Illicit Drug Use & Opioid Crisis:

    • Illicit drugs are defined as Schedule I nonprescription substances with no accepted medical use (e.g., heroin, LSD).
    • Chronic illicit drug addiction causes permanent neurochemical alterations in brain neurotransmitters, representing a true pathologic state.
    • The opioid crisis has altered clinical prescribing guidelines and expanded community distribution of reversal agents like Narcan (naloxone).

  • Prescription Drug Disposal Protocols (Page 80, Box 6.2):

    • Environmental Hazard: Flushing drugs down toilets has resulted in trace pharmaceutical contamination of water tables and drinking supplies.
    • Disposal Rules:
      1. Flush down the toilet ONLY if official product packaging explicitly states it is safe to flush.
      2. Utilize designated community pharmacy take-back programs.
      3. If flushing or take-back is unavailable, mix unused medication with an undesirable substance (e.g., used coffee grounds or cat litter), seal in a container, and discard in household trash.
      4. Mandatory Step: Completely strip or obliterate all personal health information (name, address, date of birth) from prescription containers prior to disposal.

  • Over-the-Counter (OTC) & Combination Products (Page 75):

    • Accidental Overdose Risks: Multiple OTC multi-symptom preparations contain overlapping active ingredients.
    • Example: Out of five common OTC cold/flu formulations (NyQuil Severe Cold, DayQuil Severe Cold, Nighttime Severe Cold & Cough, TheraFlu, etc.), all 5 contain acetaminophen and 4 contain dextromethorphan. Ingesting multiple formulations simultaneously results in inadvertent acetaminophen toxicity.
    • Alternative Therapies: Dietary and herbal supplements are not strictly regulated by standardized guidelines for active ingredient concentration. They are not benign and can cause severe drug interactions or toxicity.
    • Behind-the-Counter Drugs: Non-prescription medications kept behind the pharmacy counter requiring pharmacist interaction and ID scanning (e.g., pseudoephedrine, restricted to monitor and prevent illegal methamphetamine production).

Questions & Discussion

  • Legal Ramifications of Diagnosing:
    • Question: Are there professional or legal consequences for telling a patient that they may have a specific medical diagnosis?
    • Response: Yes, severe consequences exist. Nurses are legally prohibited from making medical diagnoses as it falls outside the nursing scope of practice. Nurses should instead encourage physician follow-up (e.g., recommending, "You should mention these symptoms to your doctor").