Medical Emergency Medications

OVERVIEW: How These Meds Fit into Your Exemplars

1. Epinephrine

Textbook: Hinkle, Ch. 11 (Shock intro) & Ch. 68 (Emergency preparedness)
Common emergency use: Anaphylaxis, cardiac arrest, severe bronchospasm, shock states.

Mechanism of Action:

Epinephrine is a sympathomimetic — it acts on alpha and beta adrenergic receptors:

• Alpha-1: causes vasoconstriction → ↑ blood pressure, ↓ mucosal edema (opens airways)

• Beta-1: increases heart rate, contractility, and cardiac output

• Beta-2: bronchodilation (opens the lungs)

Why It’s Used:

• Anaphylactic reaction: reverses airway swelling, bronchoconstriction, and hypotension.

• Shock (general): supports blood pressure and perfusion when unresponsive to fluids.

• Cardiac arrest: stimulates the heart to restart contractions.

Administration:

• Route (emergency use): IM injection in the mid-anterolateral thigh (vastus lateralis).

  • Thigh is preferred because it has large muscle mass and good blood supply = faster absorption.

• Onset: Rapid (within minutes).

Nursing Considerations:

• Monitor HR, BP, O₂ sat continuously.

• Assess airway and breathing first (ABC priority).

• Teach patient to always carry EpiPen if they have severe allergies.

(BURNS) 2. Silver Sulfadiazine (Silvadene) Cream

Textbook: Hinkle, Ch. 57 – Burns

Mechanism of Action:

• Broad-spectrum antimicrobial topical agent that kills bacteria by damaging bacterial cell membranes and DNA.

Why It’s Used:

• Used on partial-thickness and full-thickness burns to prevent or treat infection.

• Burn patients are at high risk for sepsis, which can lead to shock.

Application:

• Apply thin layer 1–2x daily using sterile technique after debridement and cleansing.

• Avoid in patients with sulfa allergies or during pregnancy/newborns (can cause kernicterus).

Nursing Considerations:

• Monitor for leukopenia (low WBCs) and rash.

• Keep wound clean and covered with a sterile dressing.

• Pain management before wound care!

3. Tetanus Shot (Tetanus Toxoid or Tdap/DTaP)

Textbook: Hinkle, Ch. 57 (Burns), Ch. 68 (Emergency Preparedness)

Mechanism of Action:

• Vaccine that triggers the immune system to produce antibodies against Clostridium tetani (the bacteria that causes lockjaw).

Why It’s Used:

Given prophylactically for any open wound, burn, animal bite, or puncture where there’s risk of contamination.

Indications Tentanus:

Nursing Considerations:

• Monitor for allergic reaction post-injection (have Epinephrine available).

• Common side effects: soreness, redness at site, mild fever.

🐍 4. Anti-Venin (Antivenom)

Textbook: Hinkle, Ch. 67 – Environmental and Animal Bites Section

Mechanism of Action:

• Contains antibodies that neutralize specific venom toxins (snake, spider, scorpion).

• Prevents venom from binding to tissues and causing systemic effects (neurotoxicity, coagulopathy, shock).

Why It’s Used:

• Given for snake bites (like rattlesnake, coral snake) and spider bites (black widow).

• Prevents complications such as shock, respiratory failure, and tissue necrosis.

Administration:

• IV infusion in a hospital setting; dose depends on severity and species.

• Perform skin test for hypersensitivity before giving.

Nursing Considerations:

• Monitor for anaphylaxis → have Epinephrine and airway equipment ready.

• Record type of snake/spider if possible.

• Keep limb immobilized and below heart level until treated.

5. Reversal Agents for Overdoses

Textbook: Hinkle, Ch. 60 (Neuro), Ch. 11 (Shock), Ch. 67 (Poisoning/Overdose)