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Throat, lip, and tongue swelling
Stomach cramps, nausea, or diarrhea
Loss of consciousness
Anaphylaxis can be caused by an allergic reaction to a medicine, food, serum, bug venom, allergen extract, or chemical. The most common causes of an anaphylactic reaction are food, insect stings, medicines, and latex. Some people who are aware of their allergic reactions or allergens carry epinephrine autoinjectors. This medicine can be used to treat severe allergic reaction. It does this by improving circulation, contracting blood vessels, and opening up the airways in the lungs. It also increases the rate and force of the heartbeat.
Living with allergies
Staying away from allergens is a very effective way to treat allergies. Tips for avoiding allergens include:
Stay indoors when the pollen count is high and on windy days.
Control dust in your home, particularly the bedroom.
When possible, get rid of carpeting, blinds, down-filled blankets or pillows, and closets filled with clothes.
Wash bedding, curtains, and clothing often in hot water to get rid of dust mites.
Use dust mite covers over your mattress and pillow.
Use air conditioning instead of opening the windows.
Put a dehumidifier in damp parts of the home. But remember to clean it often.
Wear face masks when working in the yard.
Go on vacation by the beach during the heaviest part of the pollen season.
Your healthcare provider will also have suggestions for staying away from the allergens that cause reactions.Allergic reactions (hypersensitivity reactions) are inappropriate responses of the immune system to a normally harmless substance.
Usually, allergies cause sneezing, watery and itchy eyes, a runny nose, itchy skin, and rash.
Some allergic reactions, called anaphylactic reactions, are life threatening.
Symptoms suggest the diagnosis, and skin testing can help identify the substance that triggers the allergy but does not predict the severity of a future reaction.
Avoiding the trigger is best, but if it is impossible, allergy shots, when given long before the exposure occurs, can sometimes desensitize the person.
People who have had or are at risk of having severe allergic reactions should always carry a self-injecting syringe of epinephrine and antihistamine pills.
Severe reactions require emergency treatment in an emergency care facility.
Normally, the immune system—which includes antibodies, white blood cells, mast cells, complement proteins, and other substances—defends the body against foreign substances (called antigens). However, in susceptible people, the immune system can overreact cymbalta 40mg medication when exposed to certain substances (allergens) in the environment, foods, or drugs, which are harmless in most people. The result is an allergic reaction. (Allergens are molecules that the immune system can identify and that can stimulate a response by the immune system.) Some people are allergic to only one substance. Others are allergic to many. About one third of the people in the United States have an allergy.
Allergens may cause an allergic reaction when they land on the skin or in the eye or are inhaled, eaten, or injected. An allergic reaction can occur in several ways:
Triggered by substances present only during certain seasons, such as tree, grass, or ragweed pollens (seasonal allergy, including hay fever)
Triggered by taking a drug (drug allergy)
Triggered by eating certain foods (food allergy)
Triggered by breathing in dust, animal dander, or molds (year-round allergy)
Triggered by touching certain substances (such as latex)
Triggered by insect bites or stings (as occurs in anaphylactic reactions and angioedema)
In many allergic reactions, the immune system, when first exposed to an allergen, produces a type of antibody called immunoglobulin E (IgE). IgE binds to a type of white blood cell called basophils in the bloodstream and to a similar type of cell called mast cells in the tissues. The first exposure may make people sensitive to the allergen (called sensitization) but does not cause symptoms. When sensitized people subsequently encounter the allergen, the basophils and mast cells with IgE on their surface release substances (such as histamine, prostaglandins, and leukotrienes) that cause swelling or inflammation in the surrounding tissues. Such substances begin a cascade of reactions that continue to irritate and harm tissues. These reactions range from mild to severe.
Some people have an inherited tendency to produce a lot of IgE (a condition called atopy) and may overreact to some antigens that cause hay fever, asthma, skin problems, or a food allergy.
Latex is a fluid that comes from the rubber tree. It is used to make rubber products, including some rubber gloves, condoms, and medical equipment such as catheters, breathing tubes, enema tips, and dental dams.
Latex can cause the immune system to produce antibodies to IgE, which can lead to allergic reactions, including hives, rashes, and even severe and potentially life-threatening allergic reactions called anaphylactic reactions. However, the dry, irritated skin that many people develop after wearing cost of allopurinol 300mg latex gloves is usually the result of irritation and not an allergic reaction to latex.
In the 1980s, health care workers were encouraged to use latex gloves whenever touching patients to prevent the spread of infections. Since then, latex sensitivity has become more and more common among health care workers.
Also, people may be at risk of becoming sensitive to latex if they
Have had several surgical procedures
Must use a catheter to help with urination
Work in plants that manufacture or distribute latex products
For unknown reasons, people who are sensitive to latex are often allergic to bananas and sometimes other foods such as kiwi, papaya, avocados, chestnuts, potatoes, tomatoes, and apricots.
Doctors may suspect latex sensitivity based on symptoms and the person's description of when symptoms occur, especially if the person is a health care worker. Blood or skin tests are sometimes done to confirm the diagnosis.
People who are sensitive to latex should avoid it. For example, health care workers can use gloves and other products that are latex-free. Most health care institutions provide them.
Causes of Allergic Reactions
Genetic and environmental factors work together to contribute to the development of allergies.
Genes are thought to be involved because specific mutations are common among people with allergies and because allergies tend to run in families.
Environmental factors also increase the risk of developing allergies. These factors include the following:
Repeated exposure to foreign substances (allergens)
Pollutants (such as tobacco smoke and exhaust fumes)
On the other hand, exposure to various antigens, such as bacteria and viruses and foods (including peanuts), during childhood may strengthen the immune system. Such exposure may help the immune system learn how to respond to allergens in a way that is not harmful and thus help prevent allergies from developing. An environment that limits a child's exposure to bacteria and viruses—commonly thought of as a good thing—may make allergies more likely to develop. Exposure to microorganisms is limited in families with fewer children and cleaner indoor environments and by the early use of antibiotics.
Microorganisms live in the digestive tract, in the respiratory tract, and on the skin, but which microorganisms are present varies from person to person. Which ones are present appears to affect zofran 8mg tablets whether and which allergies develop.
Allergens that most commonly trigger allergic reactions include