Subcutaneous epinephrine in the prehospital setting.

Area of Science:

• Emergency Medicine
• Pharmacology
• Geriatrics

Background:

• Healthcare providers hesitate to administer subcutaneous epinephrine to elderly patients for conditions like asthma and anaphylaxis.
• Concerns exist regarding potential cardiovascular side effects in older adults.
• This review addresses whether age should be a contraindication for prehospital epinephrine use in specific patient groups.

Purpose of the Study:

• To review current practices for prehospital subcutaneous epinephrine administration.
• To systematically evaluate literature supporting or refuting its use in the elderly.
• To determine if cardiovascular risks contraindicate epinephrine use in older patients without coronary artery disease.

Main Methods:

• Searched MEDLINE and Health Star databases for studies on subcutaneous epinephrine in asthma and anaphylaxis.
• Examined bibliographies of included studies, reviews, and textbooks for additional relevant literature.
• Assessed the strength of evidence using the American Heart Association's Emergency Cardiovascular Care Committee classification system.

Main Results:

• Only three case reports (Level VII evidence) documented adverse reactions to epinephrine in anaphylaxis/allergy.
• Several studies (Level III and V) found no adverse effects when epinephrine was used for asthma.
• No controlled trials demonstrating adverse effects in the elderly population were identified.

Conclusions:

• No significant evidence was found to contraindicate subcutaneous epinephrine use in older patients.
• This applies to patients presenting with asthma or allergic reactions who do not have known coronary artery disease.
• Age alone is not a sufficient reason to withhold prehospital epinephrine in these scenarios.