1110 W Gray St #101, Houston, TX 77019 (Montrose)

Open 24/7 — 365 Days a Year

24/7 Emergency Allergy & Anaphylaxis Care

Severe Allergic Reaction ER in Houston — Open 24/7

A severe allergic reaction can become life-threatening within minutes. Montrose Emergency Room is open 24/7 in Houston to evaluate and treat serious allergic reactions. If you suspect anaphylaxis, use an epinephrine auto-injector if prescribed and call 911 right away.

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Open 24/7
Emergency Physician On Site
Walk-Ins Welcome
CT, X-Ray & Ultrasound
On-Site Lab

If you or someone with you may be having a life-threatening emergency, call 911 immediately.

If someone has trouble breathing, throat or tongue swelling, or feels faint after an allergen, this may be anaphylaxis — a life-threatening emergency. Use an epinephrine auto-injector if one is prescribed and call 911 immediately.

When Is an Allergic Reaction an Emergency?

An allergic reaction is an emergency when it affects breathing or circulation — signs include difficulty breathing, swelling of the lips, tongue or throat, widespread hives, vomiting, dizziness or fainting. These can indicate anaphylaxis, which requires epinephrine and emergency care. Call 911 immediately for these symptoms.

Milder reactions such as a localized rash may not need the ER, but reactions that spread quickly or involve breathing, swelling or fainting are medical emergencies. Montrose Emergency Room can evaluate and treat severe reactions and monitor for a second wave of symptoms.

Know the Warning Signs

Allergic Reaction Symptoms That Need Emergency Care

The following may indicate a severe reaction. This list is educational and does not replace an individual medical evaluation.

Difficulty breathing or wheezing
Swelling of lips, tongue or throat
Tightness in the throat
Widespread hives or flushing
Dizziness or fainting
Rapid heartbeat
Vomiting or stomach cramps
A feeling that something is seriously wrong

Call 911 and use an epinephrine auto-injector if prescribed when there is trouble breathing, throat swelling or fainting.

On-Site Diagnostics

Evaluation & Treatment for Allergic Reactions

Treatment depends on the severity of the reaction and may include medications, monitoring and on-site testing when appropriate.

CT Scan

CT imaging may help evaluate certain head, chest and abdominal emergencies when ordered by the physician.

Digital X-Ray

X-rays help assess possible fractures, certain chest conditions and other injuries.

Ultrasound

Ultrasound may be used for selected abdominal, pelvic and other evaluations when clinically appropriate.

On-Site Laboratory

Lab testing supports evaluation of infection, dehydration, cardiac concerns and other conditions.

EKG & Cardiac Testing

An EKG and related testing may be used for chest pain, palpitations or other heart-related symptoms.

Testing is selected based on your symptoms, examination and the physician's assessment.

What to Expect

What Happens at the ER

Check-In

Walk in without an appointment. Our team gathers your basic information and the reason for your visit.

Medical Evaluation

An emergency provider reviews your symptoms, history and current condition to guide next steps.

Diagnostic Testing

When appropriate, testing may include labs, EKG, X-ray, CT or ultrasound performed on site.

Treatment & Next Steps

Treatment is based on the findings and may include medication, IV fluids, monitoring or coordination of a higher level of care.

Why Montrose Emergency Room

Why Choose Montrose Emergency Room

Open 24/7

Emergency care day and night, including weekends and holidays.

Emergency Physician On Site

Evaluation by an emergency physician during your visit.

On-Site Diagnostics

CT, X-ray, ultrasound, EKG and laboratory testing when appropriate.

Walk-Ins Welcome

No appointment required for emergency evaluation.

Central Houston Location

1110 W Gray St #101, in Montrose, Houston.

Adults & Children

Emergency care for the whole family.

Allergic Reaction ER FAQ

Severe Allergic Reaction FAQs

What are the signs of anaphylaxis?

Trouble breathing, swelling of the lips, tongue or throat, widespread hives, dizziness or fainting. Anaphylaxis is life-threatening — use epinephrine if prescribed and call 911.

Should I go to the ER after using my EpiPen?

Yes. Even after epinephrine, symptoms can return. Call 911 or seek emergency care for monitoring after a severe reaction.

Can the ER treat a severe allergic reaction?

Yes. The emergency team can treat severe reactions with appropriate medications and monitor you for recurring symptoms.

What causes severe allergic reactions?

Common triggers include foods, insect stings, medications and latex. A reaction can be unpredictable, so severe symptoms always warrant emergency care.

Is Montrose Emergency Room open 24/7?

Yes. The ER is open 24 hours a day, every day, including holidays. Walk-ins welcome — but call 911 for anaphylaxis.

Severe Allergic Reaction? Act Fast

For trouble breathing, throat swelling or fainting, use epinephrine if prescribed and call 911. Montrose Emergency Room is open 24/7 for emergency allergy care.

Montrose Emergency Room
1110 W Gray St #101, Houston, TX 77019
(832) 487-0911 · Open 24/7 — 365 Days a Year

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If symptoms appear life-threatening, call 911 immediately.

This information is for general educational purposes and does not replace an individual medical evaluation.