Introduction
Epinephrine, also known as adrenaline, is a life-saving medication used in emergencies like anaphylaxis, cardiac arrest, and severe asthma attacks. As a potent adrenergic agonist, it works rapidly to increase heart rate, blood pressure, and open airways. This guide covers everything about Epinephrine, including its mechanism of action, indications, contraindications, side effects, nursing responsibilities, and patient education tips.
| Feature | Description |
|---|---|
| Generic Name | Epinephrine (Adrenaline) |
| Trade Names | Adrenalin, EpiPen, Auvi-Q, Symjepi |
| Class/Action | Adrenergic agonist / Vasopressor Stimulates α & β receptors → ↑HR, ↑BP, bronchodilation |
| Route/Dosage |
IM: 0.3-0.5mg (anaphylaxis) IV: 0.1-1mg (cardiac arrest) Inhalation: Asthma (rare) |
| High Alert | YES |
| Indications |
• Anaphylaxis • Cardiac arrest (ACLS) • Severe asthma/bronchospasm • Hypotensive shock |
| Mechanism of Action |
• Alpha-1: Vasoconstriction → ↑BP • Beta-1: ↑Heart rate & contractility • Beta-2: Bronchodilation |
| Contraindications |
• Angle-closure glaucoma • Concurrent beta-blockers (risk of HTN crisis) • MAOI use (hypertensive crisis) • Tachyarrhythmias |
| Adverse Reactions |
• Palpitations, tachycardia • Hypertension, arrhythmias • Anxiety, tremors • Tissue necrosis (if extravasation) |
| Nursing Implications |
• Monitor ECG, BP, HR continuously • Check for extravasation (IV route) • Teach EpiPen use (anaphylaxis) • Have phentolamine ready (vasoconstriction reversal) |
| Patient Education |
• Carry EpiPen if allergy history • Seek ER care after auto-injector use • Recognize anaphylaxis symptoms • Avoid triggers (foods, insect stings) |
| Notes for Nurses |
• IV use: Dilute properly, avoid extravasation • EpiPen: Hold against thigh for 3 sec • Storage: Protect from light/heat • Code situations: Follow ACLS protocols |
1. Generic & Trade Names
Generic Name: Epinephrine (Adrenaline)
Trade Names: Adrenalin, EpiPen, Auvi-Q, Symjepi
2. Class & Mechanism of Action
Class: Adrenergic agonist (vasopressor)
Action:
Alpha-1: Vasoconstriction → ↑Blood Pressure
Beta-1: ↑Heart rate & contractility → ↑Cardiac output
Beta-2: Bronchodilation → Relieves airway obstruction
3. Route & Dosage
Routes: IM (preferred for anaphylaxis), IV (cardiac arrest), SC, ET, inhalation
Dosage:
Anaphylaxis (IM): 0.3-0.5mg (EpiPen: 0.3mg adult, 0.15mg pediatric)
Cardiac Arrest (IV): 1mg every 3-5 mins (ACLS protocol)
4. High Alert Medication?
YES – Errors can cause severe hypertension, arrhythmias, or tissue necrosis.
5. Indications
Anaphylaxis (allergic reactions)
Cardiac arrest (ACLS protocol)
Severe asthma/bronchospasm
Hypotensive shock
6. Contraindications
Angle-closure glaucoma (↑IOP risk)
Beta-blockers (unopposed alpha effects → HTN crisis)
MAOIs (hypertensive crisis)
Tachyarrhythmias
7. Adverse Reactions & Side Effects
Common: Palpitations, tremor, anxiety
Serious:
Hypertensive crisis (risk of stroke)
Ventricular arrhythmias
Tissue necrosis (if IV extravasation)
8. Nursing Implications
Before administration:
Check for contraindications (glaucoma, beta-blockers).
Ensure proper dilution (IV route).
During administration:
IM: Use anterolateral thigh (EpiPen).
IV: Monitor ECG & BP continuously.
Monitoring:
Watch for arrhythmias, extravasation, rebound hypotension.
9. Patient Education
EpiPen training: Hold against thigh for 3 sec.
Seek emergency care after use (biphasic reactions possible).
Avoid triggers (foods, insect stings, latex).
10. Special Notes for Nurses
Code Blue: Follow ACLS protocols for IV dosing.
Extravasation: Use phentolamine to prevent necrosis.
Storage: Keep EpiPen at room temp (avoid extreme heat/cold).
Conclusion
Epinephrine is a critical, fast-acting drug for anaphylaxis, cardiac arrest, and severe asthma. Nurses must ensure proper administration, monitor for adverse effects, and educate patients on EpiPen use.
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