For mild food allergy symptoms (hives, itching), non-drowsy second-generation antihistamines like Cetirizine (Zyrtec), Loratadine (Claritin), or Fexofenadine (Allegra) are best for daily use, while Diphenhydramine (Benadryl) offers faster relief for acute, mild reactions but causes drowsiness. Crucially, antihistamines don't stop anaphylaxis; severe reactions require immediate epinephrine (Adrenaline) and emergency medical care, as sedative antihistamines can mask worsening symptoms.
Many people use antihistamines to treat allergy symptoms. Zyrtec (cetirizine) and Claritin (loratadine) are two popular brands. They contain different compounds but appear to be equally effective. Antihistamines can reduce allergy symptoms, such as watering eyes, itchy skin, hives, and swelling.
Diphenhydramine has been commonly used as the antihistamine of choice for acute food allergic reactions given its prompt onset of action (15–60 minutes)1 and ready availability, though epinephrine is still the first-line therapy for anaphylaxis.
For a minor allergic reaction, prescribed antihistamines or those available without a prescription may help reduce symptoms. These drugs can be taken after exposure to an allergy-causing food to help relieve itching or hives. However, antihistamines can't treat a severe allergic reaction.
Key symptoms of a food allergy include hives, a hoarse voice, and wheezing. Other symptoms that may occur include: Swelling (angioedema), especially of the eyelids, face, lips, and tongue.
Things you can do if you have a sore or white tongue
Being well hydrated helps all systems, including the immune system, work at their best. Dehydration can make seasonal allergy symptoms like a scratchy throat and itchy eyes worse. Plus, drinking water can help thin mucus and clear the body of irritants.
There is no cure for food allergy. If you have a food allergy, you need to be prepared to treat a severe allergic reaction should one occur. The treatment for a severe allergic reaction, or anaphylaxis, is epinephrine. Your allergist may recommend food allergy oral immunotherapy (OIT).
Myth: Antihistamines will stop an allergic reaction. Fact: Antihistamines (like Benadryl® or Zyrtec®) can help relieve some symptoms like an itchy mouth or skin, but they DO NOT stop anaphylaxis. Epinephrine is the only approved medication to stop anaphylaxis and should be given first and fast.
Chemicals that trigger an allergic response are known as allergens. The response level can vary from mild to life-threatening. The duration of an allergic reaction to food items can vary from one individual to another. Allergies can take a few hours to even days to subside.
XOLAIR® (omalizumab) for subcutaneous use is an injectable prescription medicine used to treat food allergy in people 1 year of age and older to reduce allergic reactions that may occur after accidentally eating one or more foods to which you are allergic.
Astepro® is a first-of-its-kind, steroid-free nasal antihistamine spray that starts working in 30 minutes for fast-acting 24-hour relief.
Even a tiny amount of the allergy-causing food can trigger symptoms such as hives, swollen airways and digestive problems. In some people, a food allergy can cause severe symptoms or even a life-threatening reaction known as anaphylaxis.
Zyrtec (cetirizine) is an over-the-counter (OTC) medication that helps relieve allergy symptoms, such as sneezing and watery eyes. It works by blocking histamine, a substance in the body that can cause these symptoms. Zyrtec begins to work quickly. Many people start noticing relief within 20 to 60 minutes.
Common symptoms of a food allergy include:
Kidney disease. Liver disease. An unusual or allergic reaction to cetirizine, other medications, foods, dyes, or preservatives. Pregnant or trying to get pregnant.
A sensitivity to a food can be indicated in a skin prick test or a blood test, but does not always show a true allergy unless there has been a previous reaction to the food. These tests may offer clues about the causes of symptoms, but they cannot determine whether someone has a food allergy with absolute certainty.
Adults and children 6 years and over may chew and swallow 2 tablets (5 mg) or 4 tablets (10 mg) once daily depending upon severity of symptoms; do not take more than 4 tablets (10 mg) in 24 hours. Adults 65 years and over may chew and swallow 2 tablets (5 mg) once daily; do not take more than 2 tablets.
Often, this happens when you develop allergies at a young age. However, symptoms of food allergies in others may get worse with age. Your immune system changes as you get older. Some of these changes can make it harder for your body to fight off allergies, exacerbating your symptoms.
For those who are sensitive, a reaction can occur within minutes or hours, and symptoms can range from mild to life-threatening. The nine leading causes of food allergies identified in the US are milk, eggs, fish, shellfish, tree nuts, peanuts, wheat, soybeans, and sesame.
There are few well-documented natural treatments for food allergies. The most obvious approach is to remove known allergenic foods from the diet. Some alternative practitioners offer laboratory tests to identify such allergens. However, no lab tests have been proven accurate for this purpose.
Probiotics have also been shown to alleviate the allergic reactions caused by such food allergens.
The "3-day rule" for allergens means introducing one new allergenic food at a time and waiting 3 to 5 days before introducing another, allowing parents to easily pinpoint which food caused a reaction, though some experts suggest a shorter wait (2-3 days) or even daily introduction for non-high-risk infants, while emphasizing introducing common allergens like peanut, egg, dairy, soy, wheat, tree nuts, and fish early (around 6 months) and regularly (2-3 times a week) to build tolerance and prevent allergies, always starting with tiny amounts and monitoring for signs like hives, swelling, or breathing issues.
Here is a list of some foods which could worsen your allergy symptoms.
As people age, changes in immune responses and immune systems can contribute to the persistence or worsening of existing allergies. Allergy symptoms can intensify over time due to a combination of factors, including the natural aging process, which affects how the body reacts to allergens.