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allergic reaction - Definition:
(Source: MedicineNet)
When an allergen enters the body, it causes the body's immune system to develop an allergic reaction in a person with an allergy to it. This reaction can occur when the immune system attacks a normally harmless substance (the allergen). The immune system calls upon a protective antibody called immunoglobulin E or IgE to fight these invading substances. Even though everyone has some IgE, an allergic person has an unusually large army of these IgE defenders -in fact, too many for their own good. T
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About allergic reaction
(Source:
eMedicineHealth)
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An allergic reaction is the body's way of responding to an "invader." When the body senses a foreign substance, called an antigen , the immune system is triggered. The immune system normally protects the body from harmful agents such as bacteria and toxins. Its overreaction to a harmless substance (an allergen) is called a hypersensitivity reaction, or an allergic reaction. Anything can be an allergen. Dust, pollen , plants, medications, (such as ibuprofen , sulfa drugs like sulfamethoxazole and
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Further Reading on allergic reaction
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Allergic Reaction - Topic Overview (
WebMD
)
Allergies are an overreaction of the body ' s natural defense system that helps fight infections ...producing antibodies to fight them. In an allergic reaction , the immune system starts fighting...
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Antihistamines for Severe Allergic Reactions - Topic Overview (
WebMD
)
...kits to stop or reduce itching,hives,sneezing and wheezing,and other symptoms caused by an allergic reaction . They are not a...and wheezing, and other symptoms caused by an allergic reaction . They...
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Allergic Reaction to Tattoo Dye - Topic Overview (
WebMD
)
Allergic reactions to tattoo dye are rare. The various colors in a tattoo are made from different materials. For example,the red... Allergic reactions to tattoo dye are rare. The various colors in a...
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Rash,Age 12 and Older - Topic Overview (
WebMD
)
Rash is generally caused by a skin irritation that can result from an allergy , infection , or skin ...shortness of breath or fever, may mean another problem, such as a serious allergic reaction or...
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Peanut Allergy - Overview (
WebMD
)
What is a peanut allergy?A peanut allergy is a reaction that occurs when your body mistakenly identifies peanuts as harmful...having an allergic reaction : Get help. Do not minimize the seriousness...
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Food Allergies - Treatment Overview (
WebMD
)
...the allergy. When that is not possible, you can use medications such as antihistamines for mild reactions and the medications in...an allergy kit. Children at risk of severe allergic reactions ...
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Iron Deficiency Anemia - Treatment Overview (
WebMD
)
Treatment for iron deficiency anemia focuses on increasing your iron stores so they reach normal ...Shots given in a vein (intravenously, IV) pose the risk of an allergic reaction . Shots given in...
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Scabies - Treatment Overview (
WebMD
)
If you suspect that you have scabies , see your doctor as soon as possible for treatment . Delaying treatment increases the risk ...This itching is caused by an ongoing allergic reaction to the mite...
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Using Antibiotics Wisely - Topic Overview (
WebMD
)
What are antibiotics ? Antibiotics are medicines that kill bacteria . Bacteria can cause infections such as strep throat , ear ...rare cases, antibiotics can cause a dangerous allergic reaction that...
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Sore Throat - Topic Overview (
WebMD
)
Sore throats can be painful and annoying . Fortunately , most sore throats are caused by a minor ...exposes you to the risks of an allergic reaction and antibiotic side effects, such as nausea...Sore...
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Reaction, allergic (
MedicineNet
)
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Allergic contact dermatitis (
MedicineNet
)
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