This text is for informational purposes only. Please consult a doctor or pharmacist before using any medication. 

Read the information leaflet that comes with the medication.

Epipen is used to relieve possible life-threatening outcomes of extreme allergic reactions. While most people who use Epipen do not experience any adverse side effects, doctors prescribe this medication because the benefits of such treatment outweigh any unwanted effects.

Some side effects that have been reported include feelings of worry, nervousness, unease, shakiness, weakness, lightheadedness, sweating, heart pounding, upset stomach, throwing up, head pain, or breathing issues. These signs show up in a few individuals taking prescribed epinephrine doses but are more expected in patients with high blood pressure or an overactive thyroid gland.

Not all side effects are listed here. If these or other unlisted symptoms persist or worsen, consult a healthcare provider or pharmacist.

Treatment of Severe Allergic Reactions: Signs of a severe allergic reaction or anaphylactic reactions may occur shortly after exposure to a trigger. These signs can include flushing, a sense of fear, fainting, a rapid or weak pulse accompanied by low blood pressure, seizures, vomiting, diarrhea, abdominal cramps, loss of bladder control, wheezing, breathing difficulties due to throat constriction, itching, skin rashes, hives, or swelling.

To diagnose, the healthcare provider might inquire about previous allergic reactions. To confirm the diagnosis, a blood test may be conducted to detect elevated levels of an enzyme (tryptase) that can remain elevated for up to three hours post-anaphylaxis. Allergy tests may also be performed to identify triggers.