hypersensitivity reactions

hypersensitivity reactions,

n.pl any of several forms of overly responsive actions of the immune system to normally encountered, antigens. Also called
allergic reactions.

Patient discussion about hypersensitivity reactions

Q. ALLERGIES what are they,who gets them,are they caused by pollen and food?

A. Allergy is the exaggerated and out-of-place reaction of the immune system to external substances or stimuli that are not harmful to the body, so the reaction actually damages the body instead of helping it.

The may be pollen and foods, as well as insect stings, drugs and almost any other substances.

You may read more here:
www.nlm.nih.gov/medlineplus/allergy.html
http://www.mayoclinic.com/health/allergy/AA99999

Q. what is the most common allergy? is it dust allergy?

A. thanks, I've heard of a new allergy treatment and trying to learn some more about the different kinds...

Q. what are the symptoms of Allergy?

A. from you question i understand that you think you might developed an allergy. so here is a web page with couple of videos explaining about allergies:
http://www.healthline.com/video/allergies

More discussions about hypersensitivity reactions
References in periodicals archive ?
Hypersensitivity reactions are an expected and common side effect of oral immunotherapy.
Ten AR101 patients, or just under 3%, left the study because of systemic allergic hypersensitivity reactions while 20% discontinued from the trial.
Most cases premedicated with hydrocortisone and antihistamines did not develop any significant hypersensitivity reactions.
Features of hypersensitivity reactions include rash, urticaria, flushing, itching, abdominal cramps, diarrhea, and backpain.
Hypersensitivity reactions to intravenous (IV) products containing polyethylene glycol castor oil have been reported in the literature and are the subject of warnings for a number of FDA-approved drugs.
Currently, the only injectable NK1 receptor antagonist approved in the US contains polysorbate 80, a surfactant, which may cause hypersensitivity reactions, infusion site reactions or other adverse reactions in some patients.
According to the FDA statement announcing the approval, serious side effects of crisaborole include hypersensitivity reactions.
As consumption of energy drinks containing taurine increases, the problem of an increase in cases presenting with various forms of hypersensitivity reactions should be considered.
All other non-allergic food hypersensitivity reactions may be described as "food intolerance".
All products in the line are free from perfumes, parabens and dyes, which the company says minimizes the risk of allergies and hypersensitivity reactions.
BRIVIACT is associated with important warnings and precautions including suicidal behavior and ideation, somnolence, fatigue, dizziness, disturbance in gait and coordination, psychiatric adverse reactions including non-psychotic and psychotic symptoms, and hypersensitivity reactions (bronchospasm and angioedema).
The thought has been that these patients should be on lower doses to prevent metabolite buildup in the kidneys and hypersensitivity reactions, but "if you follow those guidelines, less than 20% of patients will lower their serum urate, so you will be giving the drug for nothing," he said.