N
The Daily Insight

How does an EpiPen make you feel?

Author

Sarah Cherry

Updated on February 18, 2026

EpiPen is an injection containing epinephrine, a chemical that narrows blood vessels and opens airways in the lungs. These effects can reverse severe low blood pressure, wheezing, severe skin itching, hives, and other symptoms of an allergic reaction.

Then, do you have to go to the hospital after using an EpiPen?

Using EpiPen ® does not replace seeing a doctor or going to the hospital. The effects of epinephrine can wear off or you could have a second reaction, so call 911, or go to the emergency room right after using EpiPen.

Additionally, what happens when you use an EpiPen when not needed? Accidental Epinephrine Injections & the Consequences: The greatest risk of an accidental or an incorrect injection is that injecting the epinephrine elsewhere can delay or impair the effectiveness during a time-critical emergency.

Similarly one may ask, how quickly does EpiPen work?

Once injected, epinephrine works quickly to raise blood pressure and open airways. However, one dose may not be enough for everyone. Up to 20 percent of people experiencing anaphylaxis will have what's known as a biphasic reaction, in which they are wracked with another attack hours after the first.

Can you die from an EpiPen?

A dose of epinephrine for a relatively mild reaction does not harm a patient in any way.” Epinephrine can kill you. One woman committed suicide with epinephrine injectors. Epinephrine increases blood pressure and can trigger heart arrhythmias, strokes, and heart attacks.

Related Question Answers

How long does epinephrine stay in your system?

How long does a dose of epinephrine last? According to Dr. Brown, studies have shown there is “epinephrine in your system for at least 6 hours.

Can you survive anaphylaxis without treatment?

If you do not receive the proper treatment, anaphylaxis can turn deadly in less than 15 minutes. The hospital staff will want to monitor you closely. They may give you another injection. In the case of severe reactions, one injection is sometimes not enough.

Can anaphylaxis happen hours later?

Some reactions can occur after several hours, particularly if the allergen causes a reaction after it has been eaten. In very rare cases, reactions develop after 24 hours. Anaphylaxis is a sudden and severe allergic reaction that occurs within minutes of exposure.

Does an EpiPen hurt?

Like many drugs, there might be side effects from epinephrine, such as anxiety, dizziness, and sweating, and swelling, pain, or changes in skin color at the injection site because of decreased blood flow to the area. And though rare, people with heart disease might experience chest pain after an injection.

How long does anaphylaxis take to start?

Symptoms of anaphylaxis Anaphylaxis can occur within minutes – the average is around 20 minutes after exposure to the allergen. Symptoms may be mild at first, but tend to get worse rapidly. Typical symptoms and signs may include: Facial swelling, including swelling of the lips and eyelids.

How do you feel after anaphylaxis?

The symptoms can rebound, returning hours or even days after you get an epinephrine injection. Most cases of anaphylaxis happen quickly and fully resolve after they're treated. However, sometimes the symptoms get better and then start again a few hours later. Sometimes they don't improve hours or days later.

Can you use someone else's EpiPen in an emergency?

The EpiPen is intended for self-administration, or administration by a family member or carer, in an emergency. Two EpiPens should be carried with you at all times… A person either needs an epipen or they don't. Using one person's epipen is not going to deliver a different version or the dose of 'epinephrine'.

What to do after using EpiPen?

The effects of epinephrine can wear off or you could have a second reaction, so call 911, or go to the emergency room right after using EpiPen. When the dose is delivered and EpiPen ® is released from the injection site, the orange needle cover will automatically extend and immediately locks in place.

Can an EpiPen go through jeans?

Firmly push the end of the EpiPen with the orange tip into the side of the thigh (upper leg). The EpiPen needle will be able to pierce through most types of clothing, so pants do not need to be removed first in an allergic emergency.

Will an EpiPen kill you if you don't need it?

Epinephrine can kill you. One woman committed suicide with epinephrine injectors. People who have a mild allergic reaction to food would be better off taking Benadryl, not epinephrine. And even those who do have severe allergies don't need to buy overpriced EpiPens.

How do you know if you need an EpiPen?

When to use EpiPen ®
  1. Mouth. Swelling of the lips or tongue, metallic taste, itching.
  2. Throat. *
  3. Skin. Swelling around the eyes, hives, flushing, itching, redness, paleness.
  4. Gut. Cramps, nausea, vomiting, diarrhea.
  5. Lung. *
  6. Heart. *
  7. Overall*

What happens if I accidentally injected myself with an EpiPen?

Yes. If necessary, you can inject EpiPen ® through clothing. Accidental injection into the hands or feet may result in loss of blood flow to the affected areas and should be avoided. If there is an accidental injection into these areas, go immediately to the nearest emergency room for treatment.

Can epinephrine kill you?

A dose of epinephrine for a relatively mild reaction does not harm a patient in any way.” Epinephrine can kill you. One woman committed suicide with epinephrine injectors. Epinephrine increases blood pressure and can trigger heart arrhythmias, strokes, and heart attacks.

What will an EpiPen do to a normal person?

EpiPen is an injection containing epinephrine, a chemical that narrows blood vessels and opens airways in the lungs. These effects can reverse severe low blood pressure, wheezing, severe skin itching, hives, and other symptoms of an allergic reaction. Epinephrine is also used to treat exercise-induced anaphylaxis.

Can you get an EpiPen just in case?

Even if you've only gotten hives in the past, it's impossible to predict if the next reaction will be worse or milder.” Having an EpiPen, just in case, can give you peace of mind and potentially save your life.

Can Benadryl prevent anaphylactic shock?

If you're with someone having signs and symptoms of anaphylaxis, don't wait to see whether symptoms get better. An antihistamine pill, such as diphenhydramine (Benadryl), isn't sufficient to treat anaphylaxis. These medications can help relieve allergy symptoms, but work too slowly in a severe reaction.

How long does it take for an EpiPen to wear off?

Seek emergency medical attention even after you use EpiPen to treat a severe allergic reaction. The effects may wear off after 10 or 20 minutes.

Will an EpiPen help a heart attack?

For patients in cardiac arrest, administering epinephrine helps to restart the heart but may increase the overall likelihood of death or debilitating brain damage, according to a study. Epinephrine, also known as adrenaline, is a hormone that stimulates the heart and promotes the flow of blood.

How can I get a free EpiPen?

Pharmaceutical Company Assistance Programs Mylan Specialty L.P., the manufacturer of EpiPen, and Kaleo, Inc., which makes Auvi-Q, each offer prescription assistance programs to provide epinephrine to consumers who can't otherwise afford them. In some cases, the manufacturers can get you epinephrine for free.

Can epinephrine cause a heart attack?

Increased doses of epinephrine quicken the response, but some studies have shown that brain and heart damage are some of the side effects. Injection of epinephrine into the blood stream will cause an increase of blood flow throughout the body.