What is the meaning of allergic reaction?

Allergic reaction: The hypersensitive response of the immune system of an allergic individual to a substance. 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.

What is an allergy simple definition?

The definition of allergy Allergy occurs when a person reacts to substances in the environment that are harmless to most people. These substances are known as allergens and are found in dust mites, pets, pollen, insects, ticks, moulds, foods and some medications.

What is allergic reaction in pharmacology?

A drug allergy is the abnormal reaction of your immune system to a medication. Any medication — over-the-counter, prescription or herbal — is capable of inducing a drug allergy. However, a drug allergy is more likely with certain medications. The most common signs and symptoms of drug allergy are hives, rash or fever.

What are examples of allergic reactions?

Common symptoms of an allergic reaction include:

• sneezing and an itchy, runny or blocked nose (allergic rhinitis)
• itchy, red, watering eyes (conjunctivitis)
• wheezing, chest tightness, shortness of breath and a cough.
• a raised, itchy, red rash (hives)
• swollen lips, tongue, eyes or face.

What to do when you have an allergic reaction?

Bathing in a soothing substance, such as baking soda, may help as well. For a severe reaction or an allergic reaction that develops after you have taken a medication, you may need a doctor’s evaluation and treatment instead. One way of treating a rash from an allergic reaction involves efforts to stop it from itching.

What are the different types of allergic response?

Four different types of allergic reactions are immediate, cytotoxic, immune-complex mediated and delayed hypersensitivity reactions. Allergic reactions occur when the body’s immune system has a reaction to a substance it sees as harmful, called an allergen .

What is the most common type of allergic reaction?

The most common allergies include pollen and household allergies, such as dust mites, pets and some foods. While most allergies are just minor inconveniences, others can be quite serious. A severe allergic reaction, known as anaphylaxis, may require immediate medical attention.

What should I know about allergic reactions?

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