same blueprint content, but rewritten in Notion-style with just enough detail to make it clear and study-friendly
Endocrine System
🩸 Pituitary Hormones: Anterior vs Posterior Glands
🧩 Anterior Pituitary Hormones
1. Growth Hormone (GH)
- Function: Stimulates growth of bones, muscles, and organs; increases protein synthesis and cell division.
- Drugs Replacement:
- Somatropin: Synthetic form of GH used to treat growth hormone deficiency.
- Drugs Blocker:
- Bromocriptine: inhibits GH secretion (used for acromegaly).
- Octreotide: Suppresses GH (e.g., acromegaly).
- Pegvisomant (Somavert): GH receptor antagonist
- "Oak tree o tide”
Monitoring:
◦ Growth measurements (height, weight) ◦ Blood glucose levels ◦ Thyroid function
Side Effects:
◦ Injection site reactions ◦ Headache ◦ Hyperglycemia ◦ Hypothyroidism
Excess (Acromegaly)
• Cause: Usually, pituitary tumor producing excess growth hormone • Symptoms: ◦ Enlarged hands, feet, and facial features ◦ Joint pain ◦ Carpal tunnel syndrome ◦ Hypertension ◦ Diabetes
2. Corticotropin (ACTH)
- Function: Stimulates adrenal cortex to produce cortisol and other glucocorticoids.
- Clinical use: Diagnosis or treatment of adrenal insufficiency (To little ACTH).
💧 Posterior Pituitary Hormones
1. Vasopressin (ADH)
- Function: Promotes water reabsorption in the kidneys; causes vasoconstriction.
- Clinical use: Management of diabetes insipidus or shock; helps control urine output and blood pressure.
- Diabetes insipidus (DI): is a disorder that affects the body's ability to regulate fluid balance, leading to excessive thirst and urination
- diabetes in"SIP"idus = excessive thirst
- shock = lack of fluids
- Decreased thyroid hormone production → slowed metabolism.
- Severe Form: Myxedema — severe hypothyroidism in adults.
- Fatigue
- Weight gain
- Cold intolerance (to slow, their body can’t produce enough heat)
- Bradycardia
- Constipation
- Dry skin
- Depression / lethargy
- Medication: Levothyroxine (levO = hypO)
- Synthetic T₄ replacement. Restores normal thyroid hormone levels.
- Important: Levothyroxine increases metabolism, this may increase insulin requirements in diabetic patients (monitor blood glucose closely).
- Levo - Check glucose
- L - long lasting, E - empty stomach, early morning, V - very hyper, O - Oh baby is fine.
- Time to notice the effects: 4 weeks to several months
Never stop abruptly.
- Excess thyroid hormone → increased metabolic rate.
- Common Cause: Graves’ disease ,pt can present Goiter (a swelling of the neck)
- Tachycardia (fast heart rate)
- Heat intolerance (heat intolerance = sensitive to heat)
- Weight loss
- Nervousness, tremors
- Exophthalmos (bulging eyes)
- Medication: Propylthiouracil (PTU) and Methimazole.
- Antithyroid drug used before surgery or radioactive iodine therapy.
- Inhibits synthesis of thyroid hormones.
- Risk for Hepatotoxicity and Agranulocytosis. (decreased white blood cells)
- Propylthiouracil Safer in pregnancy.
- Complication: Thyroid Crisis (Thyroid Storm)
- Life-threatening increase of thyroid hormones.
- High fever
- Severe tachycardia
- Agitation or delirium
- Hypertension → can progress to shock or coma.
- Radioiodine (RAI) Ablation: This treatment involves swallowing a dose of radioactive iodine, which is absorbed by the thyroid cells and destroys them over time. RAI therapy is often used to treat Graves' disease or toxic nodules. It typically cures hyperthyroidism by permanently destroying the thyroid gland, which makes lifelong levothyroxine therapy necessary
- Total Thyroidectomy: This is the surgical removal of the entire thyroid gland. It is sometimes recommended for patients with Graves' disease, a very large goiter, or nodules that are concerning for cancer. After the surgery, the patient's body produces no thyroid hormone and they will need to take a synthetic replacement, such as levothyroxine, for the rest of their life.
Note:
Pts with hyperthyroidism sometimes they required complete destruction or extraction of their thyroids, after that they will follow Levothyroxine therapy since they won’t have thyroid hormones being produced by their body.
This are Procedures, no treatments.
Radioactive Iodine (I-131) -To treat Hyperthyroidism.
Mechanism: Destroys thyroid tissue. One-time oral dose Result: Permanent treatment (often leads to hypothyroidism) Precautions: ◦ Radiation safety measures ◦ Avoid pregnancy ◦ Avoid close contact with pregnant women and children for several days ◦ Flush toilet multiple times ◦ Wash hands thoroughly
Another treatment is Thyroidectomy ( Extraction or removal of the thyroids)
🧪 Calcitriol (Increases calcium in blood)
- Treats hypocalcemia caused by parathyroid hormone deficiency.
- Active form of Vitamin D → increases calcium absorption from the intestine and reabsorption from the kidneys.
- Goal: Raise and maintain normal blood calcium levels.
🧬 Calcitonin (Lower calcium in blood)
- Treats hyperparathyroidism (excess PTH).
- Lowers calcium levels by inhibiting bone resorption and promoting calcium storage in bone.
- Goal: Reduce elevated calcium levels in the blood.
We have a patient with Addison disease. This patient with Addison disease because he doesn't have cortisol he's receiving a treatment of cortisol. A stupid doctor decides to stop him from taking cortisol, if he stops taking cortisol so he will suffer Adrenal crisis.
Drug: Cortisol
- Key Point: Always taper slowly when discontinuing glucocorticoid therapy.
- Usually used for pts that need to lower their immune system or inflamation.
• Inflammatory conditions (asthma, COPD, arthritis, IBD) • Autoimmune disorders (lupus, rheumatoid arthritis) • Severe allergic reactions • Adrenal insufficiency (Addison's disease) • Organ transplant (immunosuppression) • Certain cancers
- Reason:
- Prevents adrenocortical insufficiency(Adrenal Crisis) (body cannot produce enough cortisol).
- During therapy, the body stops producing its own cortisol due to feedback suppression.
- Definition: Sudden, severe deficiency of cortisol.
- Causes: Abrupt withdrawal of glucocorticoids or stress in a patient with adrenal insufficiency.
- Hypotension
- Hypoglycemia
- Dehydration
- Weakness and confusion
- Can be life-threatening
- Chronic adrenocortical insufficiency — the adrenal glands do not produce enough cortisol and sometimes aldosterone.
- Hypotension
- Fatigue, muscle weakness
- Weight loss
- Hyperpigmentation (bronze skin tone)
- Craving for salt
Addison's Disease (Adrenal Insufficiency) ⇒ Hyperkalemia, Hyponatremia ⇒ Risk for Adrenal crisis.
Cushing's Syndrome (Excess Cortisol) ⇒ Hypokalemia, Normal or elevated Na ⇒ Rarely life-threatening
Other cortisol drugs: (-sone): Prednisone, Methylprednisolone
Cortisol Medication.
• Blood glucose (risk of hyperglycemia/diabetes) • Blood pressure (risk of hypertension) • Weight (fluid retention) • Signs of infection (immunosuppression) • Bone density (risk of osteoporosis) • Mood changes
• Infection prevention: ◦ Avoid crowds and sick people ◦ Report fever, sore throat, or signs of infection immediately ◦ May not develop typical signs of infection • Take calcium and Vitamin D supplements for bone health • Carry medical alert identification • Do not stop medication suddenly • Report any unusual symptoms • Monitor blood glucose if diabetic
🧠Key: Genetically under develop. Short, lack of growth hormone. Hungry and fatty. 🧠 Definition
- A genetic disorder caused by loss of function of specific genes on chromosome 15.
- Leads to multiple physical, behavioral, and endocrine abnormalities.
- Hypotonia: Low muscle tone, especially noticeable at birth.
- Hyperphagia: Excessive appetite and constant hunger → often leads to obesity if uncontrolled.
- Short Stature & Delayed Growth: Slow physical development and reduced height.
- Cognitive & Behavioral Challenges:
- Mild to moderate intellectual disability. Behavioral problems such as stubbornness or temper outbursts.
- Endocrine Problems:
- Growth hormone deficiency.
- Hypogonadism (underdeveloped sex organs or delayed puberty).
Somatropin (recombinant human growth hormone) is indeed used in almost all children with PWS because it improves:
- Muscle tone and strength 💪
- Linear growth (height) 📏
- Fat metabolism (reduces body fat, increases lean mass) ⚖️
- Bone density 🦴
- Possibly alertness, energy, and cognitive function 🧠
🔍 Types of Diabetes (1 = child, 2 = adult)
- Autoimmune destruction of pancreatic beta cells. Detected on kids and teenagers.
- Requires insulin for survival.
- Pills won’t be effective.
- Need insulin therapy.
- Related to heredity, obesity, lack of exercise. Studies have shown that up to 70% of people with type 2 diabetes can achieve remission (normal blood sugar levels without medication) through lifestyle changes and/or medications.
- Most common type. Oral med first, then Insulin if not enough.
- Often managed with diet, exercise, and oral medications before insulin becomes necessary.
- Autoimmune, like Type 1, but develops later in adulthood and progresses more slowly making it look like type 2 diabetes, but it won’t respond well to medication.
- May initially respond to oral meds but eventually requires insulin cause is a progressive autoimmune destruction of beta cells…
Normal fasting blood glucose: 70-100 mg/dL
Abnormal (<70 or >180)
Hemoglobin A1c (HbA1c) ≥ 6.5% (Means diabetes risk). HbA1c reflects average blood glucose over 2-3 months
Unopened vials: Store in refrigerator
Opened vials: Can be kept at room temperature for up to 28 days
Never freeze insulin Never warm insulin in the microwave Keep away from direct heat and light
When a patient shows signs of hypoglycemia (e.g., received regular insulin at 7:30 AM, at 9:30 AM feels hungry with dull headache), the FIRST nursing action is to test the patient's blood glucose level
15g fast-acting carbs, Recheck in 15 min, Glucagon if unconscious
Other: 4 ounces of orange juice (equals 15g carbs) , glucose tablets, 4 oz regular soda, 1 tablespoon honey
Never give oral fluids to unconscious patients
- Somogyi Effect → Rebound hyperglycemia caused by nighttime hypoglycemia (due to too much evening insulin).
- Management: Decrease the bedtime insulin dose
- Low at 2–3 AM, then high in the morning
- Dawn Phenomenon → Early morning hyperglycemia from normal hormone release (growth hormone, cortisol).
- Normal or high at 2–3 AM, then high in the morning.
- Management: Increase bedtime insulin dose OR change timing of insulin administration
👉 Key Points
- Dawn = morning hyperglycemia from hormones.
- Somogyi = rebound hyperglycemia.
📝 Detail Information
Checking 3 AM blood glucose helps differentiate:
- Low at 3 AM → Somogyi.
- Normal/high at 3 AM → Dawn.
Management differs: Somogyi requires evening insulin adjustment; Dawn may need increased basal insulin.
Lipodystrophy: Fatty lumps or indentations at injection sites from repeated injections in the same area Weight gain: Common with insulin therapy
💉 Insulin Types
Type | Example | Onset / Peak / Duration | Notes |
Rapid-acting | Lispro, Aspart | Onset: 10–15 min
Peak: ~1 hr
Duration: 3-5 hr | Give within 15 min before eating |
Short-acting | Regular (Novolin R) | Onset: ~30 min
Peak: 2–4 hr
Duration:5-8 hr | Only insulin that can be given IV. 30 min
before meals |
Intermediate-acting | NPH (Humulin NPH) | Onset: 1–2 hr
Peak: 4–12 hr
Duration18-24 hr | NEVER give IV |
Long-acting | Glargine, Degludec, ,Detmir(Levemir) | Onset: ~1-2 hrhr
Peak:Minimal/None
Duration: 20-24+hr | Given once daily, usually at bedtime |
🩸 Insulin Administration
- Check blood glucose at peak times
- Rapid-acting (Lispro): ~1 hour after administration.
- Short-acting (Regular): 2–4 hours after administration.
- Intermediate-acting (NPH): 4–12 hours after administration.
- Long-acting (Glargine/Degludec): Minimal peak — steady action.
- Insulin glargine (Lantus) is the answer when a patient with Type 1 DM is ordered insulin therapy once daily to be administered at bedtime
- Mixing insulin:
- "it's always CLEAR before it gets CLOUDY - just like the sky before it rains"
- Rapid acting before intermediate
- (More dangerous than Hyperglycemia, cause it can lead to coma)
- Symptoms:
- Hunger
- Sweating
- Tremors
- Irritability or confusion
- Tachycardia (Beta blockers can mask this symptoms)
- Headache
- Severe cases: Loss of consciousness or seizures.
- Glucagon → Administered to unconscious hypoglycemic patients to raise blood glucose.
- Insulin Pumps
- Deliver continuous basal insulin with bolus doses before meals.
- Still require:
- Regular glucose monitoring.
- Carbs = Sugar, so u count them to know witch one is the best Insulin dose.
- Yes, many people with diabetes need to count carbs to help manage their blood sugar levels, especially if they use insulin. Counting carbs can help with managing blood sugar, matching insulin doses to meals, and planning meals
- Action:
- Improves insulin sensitivity (helps cells use glucose better).
- Decreases hepatic glucose production (less glucose released from the liver).
- Notes:
- Does not cause hypoglycemia when used alone.
- Side effect: Bitter/metallic taste
- Usually the first-line oral agent for Type 2 diabetes.
- Should be held before procedures using contrast dye due to risk of lactic acidosis.
- MRI/CT contrast dye (iodinated contrast) can sometimes cause acute kidney injury (AKI).
- If the kidneys suddenly don’t work well, metformin can build up in the body.
- At the same time, the kidneys also can’t clear lactic acid effectively.
- Together → this raises the risk of metformin-associated lactic acidosis (MALA).
Muscle makes lactate → liver usually recycles it → Metformin blocks this → lactate accumulates → increases risk for lactic acidosis.
🧲 Metformin & MRI Contrast Dye
- Action: Stimulate the pancreas to release more insulin.
- Use: Type 2 Diabetes Mellitus (requires functioning beta cells).
- Key Point: Risk of hypoglycemia if meals are skipped or delayed.
- Take 30min before meals.
- Drugs:Glipizide, Glyburide, Glimepiride
- Action: Improve insulin sensitivity in muscle and fat tissue.
- Use: Type 2 diabetes to enhance glucose uptake.
- Caution: May cause fluid retention or weight gain.
- Action: Delay carbohydrate absorption in the intestine.
- Effect: Lowers post-meal (postprandial) blood glucose spikes.
- Note: Take with the first bite of food.
- Action: Stimulate rapid, short-acting insulin secretion from the pancreas.
- Timing: Take just before meals to cover mealtime glucose increases.
- Caution: Skip the dose if skipping the meal.
- Action:
- Mimic or enhance incretin hormones → increase insulin release and suppress glucagon after eating.
- Slow gastric emptying → improve post-meal glucose control.
- Result: Better glucose regulation with lower hypoglycemia risk.
Hypoglycemia: Cold and clammy→ Give some candy.
Hyperglycemia: Hot and dry → Sugar is high.
Clammy ⇒ Sweating No, mixed insulins, including those prepared in a single syringe, should never be given intravenously (IV), only SUBQ , cause it has NPH (Intermediate acting and that one can not be given IV).
Autonomic Nervous System
💊 Beta-Adrenergic Blockers
- Mechanism of Action:
- Block sympathetic stimulation of the heart (inhibit β₁-receptors).
- Decrease heart rate and reduce myocardial contractility.
- Lower blood pressure by reducing cardiac output and renin release.
- Used For:
- Hypertension
- Angina (chest pain)
- Heart failure (certain beta blockers)
- Post-myocardial infarction (to reduce cardiac workload)
- Tachyarrhythmias (to control rapid heart rate)
- Nursing Considerations:
- Check apical pulse before giving — hold if pulse <60 bpm and notify provider.
- Monitor blood pressure and signs of bradycardia.
- Caution with patients who have asthma or COPD (may cause bronchoconstriction with non-selective agents → Propanolol).
- Ethnic Considerations:
- African American patients respond better when beta blockers are combined with diuretics for blood pressure control.
❤️ Anticoagulation Therapy
- Prevent clot formation and extension of existing clots (do not dissolve clots).
🩸 Heparin (acute used)
- Usually IV or subcutaneous. Used for acute clot management. Rapid onset.
- Monitoring: Requires frequent aPTT testing to ensure safe levels.
- Antidote: Protamine sulfate.
🩹 Low–Molecular-Weight Heparin (LMWH)
- Examples: Enoxaparin (Lovenox), Dalteparin.
- Commonly for DVT prophylaxis after surgery.
- Advantages:
- More predictable dosing, Less frequent monitoring (no routine aPTT).
- Longer half-life — convenient once or twice daily dosing.
⚖️ Key Differences: Heparin vs. LMWH
Feature | Heparin | LMWH |
Molecular size | Large | Smaller |
Monitoring | Requires aPTT | Minimal monitoring |
Route | IV or SubQ | SubQ only |
Onset/Duration | Short | Longer |
Use | Hospital (acute) | Outpatient or post-op prophylaxis |
- Heparin: Preferred for acute, hospital-based treatment when rapid reversal may be needed.
- LMWH: Preferred for outpatient prevention or post-surgery (predictable and safer).
Yes, platelets can cause the blockage of heart arteries by forming blood clots, especially after a cholesterol-rich plaque in the artery wall ruptures. This process, known as atherothrombosis, is a leading cause of heart attacks and strokes. When the fat wall brokens, the platelets think that the arteries is broken, so they form a clot.
- Aspirin: Inhibits platelet aggregation.
- Clopidogrel (Plavix): Used when aspirin alone is not enough or contraindicated.
- Patient Teaching:
- Avoid excessive garlic consumption → increases bleeding risk.
- Stop 7–10 days before surgery → platelets need time to regenerate.
- Break down existing clots by converting plasminogen → plasmin (fibrinolysis).
- Example: Alteplase (tPA)
- Contraindicated in recent surgery or trauma.
⏱️ Time Limits for Administration (I got to check the times on the PowerPoint)
Condition | Medication Window (from symptom onset) |
Myocardial Infarction (MI) | Within 6 hours |
Ischemic Stroke | Within 3–4.5 hours |
❤️ Cardiovascular Medications
❤️ Heart Failure → The heart becomes too weak to pump enough blood to meet the body’s needs. The heart is unable to move all blood.
💔 Myocardial Infarction (Heart Attack) → A blockage in a coronary artery stops blood flow to part of the heart muscle, causing tissue damage or death. Pain doesn’t go away with rest.
💢 Angina → Chest pain that happens when the heart muscle doesn’t get enough oxygen-rich blood, usually from narrowed arteries. So it goes away with nitro or rest.
⚡ Cardiac Arrest → The heart suddenly stops beating completely, leading to loss of blood flow to the body and requiring immediate CPR or defibrillation.
Example: Digoxin → Heart failure.
⚙️ Mechanism of Action (Digoxin is used to treat congestive heart failure)
- Slows heart rate → allows more efficient filling
- Increases cardiac contractility → improves cardiac output
📏 Therapeutic Range (Is narrow)
- 0.5–2 ng/mL
- Levels above 2 ng/mL suggest toxicity.
- Antidote: DigiFab and Digibind.
🩸 Nursing Considerations
- Check apical pulse for 1 full minute before administration.
- Hold medication if pulse < 60 bpm (or follow facility protocol).
- Use caution if patient is taking diuretics, as they may cause low K⁺.
- Monitor potassium levels — hypokalemia increases risk of toxicity.
- Early signs: Nausea, vomiting, anorexia, fatigue.
- Later signs:
- Visual disturbances (blurred vision, yellow/green halos).
- Bradycardia or arrhythmias.
⚠️ Toxicity Signs
💊 Diuretics (Pee medication)
Mechanism of Action:
- Lower blood pressure by reducing circulating fluid volume through increased urine output (peeing).
- Decrease preload and cardiac workload, leading to reduced blood pressure.
⚙️ Types of Diuretics
- Thiazide Diuretics
- Less potent (Less power); commonly used as first-line therapy for mild hypertension.
- Example: Hydrochlorothiazide (HCTZ)
- More potent; cause greater fluid and electrolyte loss.
- Example: Furosemide (Lasix) -last 6h
- Prevent potassium loss while promoting sodium and water excretion.
- Example: Spironolactone
- Often used in combination with thiazides or loops to balance potassium levels.
⚠️ Side Effects
- Electrolyte imbalances especially hypokalemia (low K).
- Orthostatic hypotension: Stand slowly to avoid dizziness or fainting.
- Dehydration: Monitor for dry mouth, weakness, and decreased urine output.
👵 Special Considerations→ Elderly
- High fall risk due to dizziness and orthostatic hypotension.
- Implement fall precautions (assist with ambulation, monitor closely).
🔄 Combination Therapy
- Diuretics are often combined with other antihypertensive agents (e.g., beta blockers, ACE inhibitors) to improve blood pressure control. Specially for African Americans.
- Block the renin–angiotensin–aldosterone system (RAAS) → prevent conversion of angiotensin I → angiotensin II.
- Result:
- Vasodilation (↓ blood pressure)
- Decreased sodium and water retention Increases Potassium retention.
- Reduced cardiac workload
- Drug names end in “-pril” (Captopril, Enalapril, Lisinopril)
- Persistent dry cough (most common) → due to bradykinin buildup.
- Hypotension (especially after first dose).
- Hyperkalemia (from reduced aldosterone secretion).
- Angioedema:
- Swelling of lips, face, tongue, or airway. → They could DIE!!
- Action: HOLD the drug immediately and NOTIFY the provider.
👥 Ethnic Considerations
- African American patients often have reduced response to ACE inhibitors when used alone.
- More effective when combined with diuretics or calcium channel blockers.
- If a dry cough develops, switch to an ARB (Angiotensin II Receptor Blocker) — similar effects without the cough.
Teach the pt. “Do not use salt substitutes” (Risk for Hyperkalemia)
Similar to ACE, but without the Dry cough. And termination is -sartan.
⚙️ Mechanism of Action
- Block angiotensin II receptors in blood vessels and adrenal glands.
- Prevent vasoconstriction and aldosterone release, leading to:
- Vasodilation
- Decreased blood pressure
- Reduced cardiac workload
💊 Common Medications
- Drug names end in “-sartan”
- Valsartan (Diovan)
- Losartan (Cozaar)
🔄 Key Points
- Used as an alternative to ACE inhibitors when patients develop a persistent cough.
- Provide similar cardiovascular benefits (↓ BP, ↓ afterload) without causing cough.
- Generally well tolerated and effective for hypertension, heart failure, and post–MI management.
• Relax vascular smooth muscle • Nifedipine (short-acting) = used for acute BP spikes • Nifedipine extended-release = long-term control • Amlodipine, Verapamil = other examples • African Americans respond well
⚙️ Mechanism of Action
- Relax vascular smooth muscle by blocking calcium entry into cells of the heart and arteries.
- Causes vasodilation, leading to:
- Decreased blood pressure
- Reduced cardiac workload
- Improved oxygen delivery to the heart muscle.
💊 Common Medications
- Nifedipine (short-acting) = Used for acute BP spikes.
- Nifedipine (extended-release) = long-term BP control.
- Other examples: Amlodipine and Verapamil
African American patients respond well to Calcium Channel Blockers, often more effectively than to ACE inhibitors alone.
Grapefruit juice increases risk for toxicity.
/
Side Effects: Edema, Hypotension, Headache.
• Dilate blood vessels, reduce cardiac workload • Forms: sublingual, transdermal, IV • CRITICAL: Ask about erectile dysfunction medications before giving ◦ Never give with PDE5 inhibitors (Viagra/sildenafil, Cialis, Levitra) • Can cause profound hypotension, syncope, cardiac arrest • Contraindication period varies (typically 24-48 hours after ED med)
⚙️ Mechanism of Action
- Dilate blood vessels (venous and arterial) → decrease preload and afterload.
- Reduce cardiac workload and oxygen demand, improving blood flow to the myocardium.
💊 Common Forms
- Sublingual (tablet or spray) – for acute chest pain (angina) relief.
- Transdermal patch or ointment – for long-term prevention of angina.
- IV form – for acute coronary syndromes or severe hypertension
⚠️ Critical Safety Alert
- Always ask about erectile dysfunction (ED) medications before administering.
- Never give nitrates with PDE5 inhibitors:
- Viagra (sildenafil)
- Cialis (tadalafil)
- Levitra (vardenafil)
- Why: Combination can cause profound, life-threatening hypotension, syncope, or cardiac arrest.
- Contraindication period: Typically 24–48 hours after use of any ED medication.
- Wear gloves when using topical Nitro.
- Hypotension (especially orthostatic)
- Headache (common due to vasodilation)
- Reflex tachycardia
- Dizziness or syncope
- Flushing
Arrythima = Irregular Heart beat.
- Used for serious ventricular or atrial arrhythmias.
- Slows conduction and stabilizes cardiac rhythm.
- Long half-life — monitor for toxicity (especially lung and thyroid).
- Used for acute ventricular dysrhythmias, particularly after MI.
- Suppresses abnormal electrical activity in the heart.
- Continuous cardiac monitoring required during administration.
- Observe for bradycardia, hypotension, or new arrhythmias.
- Monitor electrolytes (especially potassium and magnesium)
Heart failure treatment focuses on reducing workload, improving contractility, and preventing fluid overload.
- Reduce heart rate and myocardial oxygen demand. Help the heart pump more efficiently over time.
- Remove excess fluid → reduce edema and pulmonary congestion. Lower blood pressure and cardiac workload.
- Decrease afterload and preload. Promote vasodilation and reduce fluid retention.
- Increases contractility and slows heart rate.
- Example: Spironolactone Reduce sodium and water retention while conserving potassium.
🩺 Key Nursing Considerations — Cardiovascular & Endocrine Medications
- Ensure safe medication administration, monitor for adverse effects, and educate patients to promote adherence and prevent complications.
- Always connect the “why” behind each action — understanding mechanisms improves safety and judgment.
- Check vital signs:
- Blood Pressure (BP): Hold if hypotensive per protocol.
- Heart Rate (HR): Hold if <60 bpm (especially for beta blockers or digoxin).
- Review lab values:
- Electrolytes:
- Potassium (K⁺):
- Low (hypokalemia) → ↑ risk of digoxin toxicity, arrhythmias.
- High (hyperkalemia) → can cause bradycardia, heart block, asystole (especially with ACE inhibitors or potassium-sparing diuretics).
- Sodium (Na⁺):
- Affected by diuretics; low sodium can cause weakness, confusion, seizures.
- Magnesium (Mg²⁺):
- Low levels can trigger arrhythmias; monitor especially with diuretics or digoxin.
- Assess for edema:
- Indicates fluid overload or ineffective therapy.
- Measure weight daily for fluid retention.
- Check for contraindications:
- Examples:
- Bradycardia → avoid beta blockers, digoxin.
- Asthma/COPD → caution with non-selective beta blockers.
- Renal impairment → monitor with ACE inhibitors, ARBs, or diuretics.
- Medication adherence:
- Take medications exactly as prescribed — skipping or doubling doses can cause harm.
- Recognize side effects:
- Teach common vs. urgent symptoms (e.g., dry cough with ACE inhibitors, dizziness, swelling, visual changes).
- When to call the provider:
- Severe dizziness, fainting, swelling, or slow pulse.
- Unexplained bleeding or bruising (for anticoagulants).
- Difficulty breathing or rash (possible allergic reaction).
- Lifestyle modifications:
- Low-sodium, heart-healthy diet, regular exercise, smoking cessation, weight management.
- Drug–food interactions:
- Avoid grapefruit juice with calcium channel blockers.
- Avoid high-potassium foods with ACE inhibitors or potassium-sparing diuretics.
- Drug–drug interactions:
- Be cautious with NSAIDs, anticoagulants, antidiabetic agents, and other antihypertensives.
- Abrupt discontinuation:
- Stopping some medications suddenly (e.g., beta blockers) can cause rebound hypertension, tachycardia, or angina.
- Elderly: Higher risk for orthostatic hypotension, falls, and polypharmacy. Use lower initial doses and monitor closely.
- Ethnic Considerations:
- African Americans:
- Respond better to diuretics and calcium channel blockers.
- Respond less to ACE inhibitors when used alone.
- With beta blockers they might need to bee combined with diuretics.
- Asians:
- May be more sensitive to certain drugs (e.g., beta blockers, ACE inhibitors) → require lower doses.
- Comorbidities:
- Consider all disease states (e.g., diabetes, renal, respiratory) when choosing therapy.
- Review all medications to avoid harmful interactions.
- Atorvastatin (Lipitor), Simvastatin (Zocor)
- First-line therapy for high cholesterol.
Mechanism of Action:
- ↓ Total cholesterol
- ↓ LDL (low-density lipoprotein)
- ↓ VLDL (very-low-density lipoprotein)
- ↓ Triglycerides
- Slight ↑ HDL (high-density lipoprotein)
Administration:
- Take in the evening, because cholesterol synthesis is highest at night.
Side Effects:
- Muscle pain or weakness → may indicate rhabdomyolysis (muscle breakdown). High creatinine can indicate rhabdomyolysis.
- Action: Stop medication and report immediately.
- Statins work in the liver by inhibiting cholesterol synthesis. Because of this hepatic metabolism, they may increase liver enzyme levels and cause liver strain if the liver is already compromised.
- Cholestyramine, Colestipol
Mechanism of action: Bind bile acids in the intestine, preventing reabsorption → liver uses more cholesterol to make bile acids → lowers serum cholesterol.
A method to use more cholesterol in the body to get rid of it.
Side Effects: GI discomfort, constipation, bloating.
Management: Increase fluids and dietary fiber slowly to reduce constipation.
Nursing Considerations: Give other medications 1 hour before or 4–6 hours after bile acid sequestrants to prevent absorption interference.
- Examples: Gemfibrozil (Lopid), Fenofibrate (Tricor)
- Reduce triglyceride levels and increase HDL.
- Caution: May increase risk of myopathy when combined with statins.
- Inhibits cholesterol absorption in the small intestine.
- Can be combined with a statin for enhanced lipid-lowering effect.
Component | Purpose | Goal / Normal Range (general) |
Total Cholesterol | Overall cholesterol measure | < 200 mg/dL |
Triglycerides | Measure of circulating fat | < 150 mg/dL |
LDL (Bad Cholesterol) | Carries cholesterol to tissues | < 100 mg/dL (optimal) |
HDL (Good Cholesterol) | Removes cholesterol from arteries | > 40 mg/dL (men), > 50 mg/dL (women) |
Final Note
Focus on understanding mechanisms and rationales, not rote memorization.
Knowing why a medication is used, what it affects, and how to monitor it makes nursing care safer and more effective.
💪 Best of luck — you’ve got this! Happy studying!