$49$0.99

FALL SALE

Get started with the most affordable immunotherapy for only $49 $9.99
Discount applied at checkout.

Allergy Testing and Immunotherapy in Los Angeles, California

Name: Online quiz
Brand: Quiz
SKU: 00000001
Price: 49.0 USD
Availability: OnlineOnly
Rating: 4.5 (234 reviews)

In Los Angeles, California, allergens like ragweed, dust mites, and mold are common. Allergy immunotherapy can help build resistance against these allergens, providing relief from allergy symptoms and improving quality of life.

Start with a free quiz

Curex does not treat this allergen

Antihistamine Allergy: Symptoms, Diagnosis & Treatment

Essential guide on antihistamine allergies: discover symptoms, avoidance tips, diet advice, and US growth insights.

Start with a free quiz

#1 Online
Allergy Clinic

curex user showing allergy treatment kit

a male patient showing allergy drops vial

50,000+
users

Reviewed by Curex clinical team

Dr. Chet Tharpe, M.D..

Updated May 3, 2025

Key Symptoms of Antihistamines Allergy

Difficulty Breathing

An allergy to Antihistamines can lead to difficulty in breathing. This can manifest as shortness of breath, wheezing or tightness in the chest, indicating a severe allergic reaction that may be life-threatening if not immediately addressed.

Skin Rash

One of the most common symptoms of Antihistamines allergy is a skin rash. This can appear as red, itchy bumps on the skin, and may spread to various parts of the body.

Swelling

The person might experience swelling as another symptom. This can occur in the face, lips, tongue, or throat, potentially impacting breathing and swallowing.

Severe Dizziness

Experiencing severe dizziness is another symptom of an Antihistamines allergy. This could affect the person's ability to maintain their balance, putting them at risk of falls and injuries.

Stomach Pain

Stomach pain or discomfort can be a symptom of an allergy to Antihistamines. This can manifest as cramps, nausea, vomiting or diarrhea.

Fast Heartbeat

A fast or irregular heartbeat, also known as tachycardia, is a potential symptom of an Antihistamines allergy. This can lead to feelings of anxiety and panic, and could potentially result in serious cardiovascular issues if not promptly treated.

Recognize your symptoms?

Take a Quiz

woman laying on a field of grass smiling

How to Recognize if You're Allergic to Antihistamines

Knowing the Symptoms of Antihistamine Allergy

First, you need to identify the symptoms of an antihistamine allergy. These symptoms can range in severity, but they're typically similar to the symptoms of other drug allergies. Here are notable signs:

Rashes or Hives: If you have an allergy, you may develop skin rashes or hives after taking antihistamines.
Difficulty Breathing: You might experience breathing difficulties, such as wheezing or shortness of breath.
Swelling: Areas of your body, like your face, lips, or tongue, may swell.
Dizziness: Some people with antihistamine allergy may feel dizzy or faint.

Consulting with a Healthcare Provider

If you show these symptoms shortly after taking antihistamines, you may have an allergy. However, these symptoms also can be caused by other conditions. Therefore, it is crucial to consult with a healthcare professional if you suspect you have an allergy to antihistamines. They can run tests to confirm your allergy and suggest alternative treatments.

Paying Attention to Drug Interactions

Bear in mind that the symptoms might not always be from an allergy. They could be the result of an interaction between the antihistamines and other medications you're taking. Make sure to inform your healthcare provider about all the medicines and supplements you're currently taking.

Clinical Support

Our team is here to help!

Dr. Neeta Ogden, MD

Curex is poised to revolutionize the way allergies are treated in America, expanding access to clinical care and treatments that can meaningfully improve patients quality of life.

Dr. Ravi Patel, VP Telemedicine

At Curex, our mission is to help people improve their health and quality of life by understanding their allergies and treating them at their source.We provide more than individualized prescription treatments; we provide individualized care.

Jill Hamburg, PA - C

Immunotherapy made simple. We enable patients to receive personalized allergy care on their own time. No more waiting rooms.

Dr. Chet Tharpe, Medical Director

Curex has set the standard for the virtual allergy experience. From the comfort of their home, patients nationwide are able to receive a personalized treatment plan from an experienced clinician, aimed at treating the source of their allergies, not just the symptoms.

Kayla Mardaga, NP

Curex offers convenient at-home allergy testing options. Our goal is to determine if a patient would benefit from immunotherapy and then customize a treatment plan that can reduce both the symptoms and the reliance on allergy medications.

Happy Customers

We love helping people!

Allie, Nevada

"I have two cats I can finally cuddle!"
‍

Cat and dog allergies

Zachary, Texas

“I can breathe through my nose for the first time in like 20 years!"

Dust and mold allergies

Erika, New York

“I've noticed less sneezing and shortness of breath.”

Tree and grass allergies

Richard, Texas

I love the convenience!
‍

Tree and cat allergies

50,000+ users have overcome their allergies

Am I eligible?

When Antihistamines Grows and Its Impacts

Where Antihistamines Grows Across the USA?

Don't wait until next season. Start now and enjoy a life free from allergies!

Am I eligible?

Diagnostic of Antihistamines Allergy with Curex

At-Home Automatic Test Kit

Receive a painless automatic blood collector at-home. Takes less than 5 minutes. Ship it back when done

In-Lab Test

Take your test at a local lab location. (often available same day)

Concierge At-Home Test

A medical professional comes to your home or office for a quick blood draw.(schedule 5-7 days in advance)

Tips for Avoiding Antihistamines Allergy

‍

Know Your Allergies

Understanding what you're allergic to is the first step in avoiding antihistamines allergy. Allergy tests can help to identify your triggers so you can avoid them.

Go Natural

Whenever possible, consider using natural alternatives to antihistamines. There are several home remedies, like hot showers or nasal irrigation, that can provide relief from allergies without the risk of antihistamine allergy.

Maintain a Healthy Lifestyle

A healthy lifestyle can boost your immune system and reduce your reliance on antihistamines. Regular exercise, a balanced diet and adequate sleep can all contribute to reducing allergies and your need for medication.

Consult a Health Professional

If you are aware of your allergy to antihistamines, always consult with a health professional before taking any new medications or treatments. They can provide safe alternatives that can treat your allergies without causing adverse reactions.

Ready to forget about allergy hassles? Try immunotherapy!

Take a Quiz

PREVENTION+

Prevents allergies long term

At-home treatment saves time

Treatment taken daily under the tongue

Evaluation & allergy test at home

Talk or text with your clinician, as needed

$49/month (copays may apply)

ALLERGY SHOTS

Prevents allergies long term

Commute to clinic every week

Treatment injected weekly by syringe

Evaluation and testing in the clinic

Clinical visits require scheduling

Surprise insurance bills and high copays

Diet to Ease Antihistamines Allergy Symptoms

If you have a known allergy to antihistamines, optimizing your diet can help strengthen your immune system and minimize allergic reactions. Here's how you can adjust your diet.

Boost Vitamin C Intake

Citrus Fruits: Foods such as oranges, grapefruits, lemons, and limes are rich in Vitamin C which can help to fortify your immune system.
Bell Peppers and Broccoli: These are excellent sources of Vitamin C and other essential nutrients.

Include Omega-3 fatty acids in your diet

Salmon and Chia Seeds: Salmon, chia seeds, and flaxseeds are rich sources of omega-3 fatty acids which have anti-inflammatory properties that could help manage allergies.

Eat Plenty of Probiotics

Yogurt and Fermented Foods: Foods like yogurt, kefir, sauerkraut, and kimchi are loaded with beneficial bacteria which can enhance gut health, a key aspect of the immune system.

Stay Hydrated

Drink lots of fluids: Staying hydrated is crucial for maintaining overall health and supports your immune system. This includes water, herbal teas, and broth-based soups.

Remember, each individual is unique. Understanding your own body and how it reacts to different foods is essential. It is also important to combine a healthy diet with other lifestyle changes, as well as prescribed medication by your healthcare provider.

What Food Worsens Antihistamines Allergy

While it may seem counter-intuitive, certain foods can worsen antihistamine allergy symptoms due to a phenomenon known as cross-reactivity. This is where the proteins in certain foods closely resemble those in allergens - in this case, sk chemicals like histamines.

Foods Containing High Levels of Histamines

Cheese: Aged cheeses have been shown to carry vast amounts of histamine.
Alcohol: Alcoholic beverages, particularly wine, champagne, and beer, contain high levels of histamine.
Fermented Foods: Foods such as sauerkraut, vinegar, soy sauce, kefir, yogurt, and fermented sausage like salami contain significant histamine levels.

Foods Causing Histamine Release

Citrus Fruits: Oranges, lemons, limes, and grapefruit can trigger the body to release histamine.
Chocolate: Cocoa beans, used in the manufacturing of chocolate, are known to cause histamine release.
Cow Milk: Cow milk and certain other dairy products can stimulate histamine release.

Foods which carry Natural Source of Histamine

Fish: Tuna, mackerel, mahi-mahi, sardines, and anchovies are some of the fish known for their high histamine content.
Spinach: Spinach is another food high in histamines.
Tomatoes: Tomatoes, along with tomato-based products and sauces, contain significant amounts of histamine.

Note that individual responses to these foods vary, and not every person with an antihistamine allergy will react to all or any of these foods. It is advisable to seek professional medical advice for managing allergies.

Get Your Long-Term Relief Now - $49

Review your allergy test results with a Curex allergist.

Get Started

Allergy FAQ

‍

What types of antihistamines are best for quick relief from allergies?

Types of Antihistamines for Quick Relief

First-generation antihistamines: These include diphenhydramine (Benadryl) and chlorpheniramine. They act quickly but may cause drowsiness.

Second-generation antihistamines: These include cetirizine (Zyrtec) and loratadine (Claritin). They provide fast relief with less sedation compared to first-generation.

Nasal sprays: Antihistamine nasal sprays, like azelastine, can quickly alleviate nasal symptoms locally.

Can antihistamines be used in combination with other allergy medications safely?

Combining Antihistamines with Other Allergy Medications

Consult your healthcare provider before combining antihistamines with other allergy medicines to ensure safety.

Generally, antihistamines can be safely used alongside decongestants, nasal corticosteroids, or leukotriene inhibitors.

Avoid taking more than one oral antihistamine simultaneously to prevent excessive drowsiness or other side effects.

Follow dosage instructions carefully and monitor for any adverse reactions when combining treatments.

Are there any long-term side effects of using antihistamines regularly for allergies?

Long-term Side Effects of Antihistamines

**Drowsiness:** Some first-generation antihistamines can cause long-term sedation.
**Cognitive Effects:** Prolonged use, especially in older adults, can lead to memory problems and cognitive decline.
**Dryness:** Consistent use might cause dry mouth or eyes.
**Tolerance & Dependency:** Over time, the body might require higher doses for the same effect or develop dependency.
**Heart Risks:** Some studies suggest a link between regular use and heart complications.

Have questions left?

‍

Take our quiz and get a personalized consultation!

Take a Quiz

Treatment prescribed
by clinician

Clinicaly made allergen extracts are customized for your allergies

Your immune system gets desensitized to allergens, giving you long-term relief.

At-home Immunotherapy

Benefits of Curex

At-home treatment

Apply treatments in minutes from the comfort of your own home with under-the-tongue applications instead of shots or pills

5-30x higher cumulative dose vs allergy shots

Sublingual immunotherapy delivers a higher dose of allergens over the course of treatment.

Potential for results in as few as 6 months

Individual results vary but some users have reported a noticeable difference in as few as 6-12 months since starting treatments

Excellent safety profile

Studies that have been reviewed by certified physicians show that sublingual immunotherapy is a safe treatment option

Allergy Testing and Immunotherapy in Los Angeles, California

Antihistamine Allergy: Symptoms, Diagnosis & Treatment

Reviewed by Curex clinical team