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Allergic reaction
Also known as Angioedema and Hives
An allergy is a hypersensitivity disorder of the immune system. Allergic reactions occur when a person's immune system reacts to normally harmless substances in the environment. A substance that causes a reaction is called an allergen. These reactions are acquired, predictable, and rapid. Allergy is one of four forms of hypersensitivity and is formally called type I (or immediate) hypersensitivity. Allergic reactions are distinctive because of excessive activation of certain white blood cells called mast cells and basophils by a type of antibody called Immunoglobulin E (IgE). This reaction results in an inflammatory response which can range from uncomfortable to dangerous.
Source: WikipediaWhat causes it?
The most common causes of allergic reaction are seasonal allergies (hay fever), allergy, and asthma. Other possible causes, such as gastroesophageal reflux disease (gerd), are more rare.
What symptoms are related?
Within all the people who go to their doctor with allergic reaction, 41% report having skin rash, 29% report having nasal congestion, and 25% report having itching of skin.
What might my doctor prescribe?
Common Tests and Procedures
Patients with allergic reaction often receive complete physical skin exam performed (ml), other diagnostic procedures on skin and subcutaneous tissue, ophthalmic examination and evaluation, bone density scan, prophylactic vaccinations and inoculations, diagnostic procedures on ear, other or therapeutic nervous system procedures and other diagnostic nervous system procedures .
Common Medications
The most commonly prescribed drugs for patients with allergic reaction include diphenhydramine (benadryl), methylprednisolone (medrol), epinephrine, famotidine, cetirizine (zyrtec), mometasone nasal product, azelastine nasal, cimetidine, fexofenadine / pseudoephedrine, olopatadine ophthalmic, levocetirizine (xyzal), ketotifen ophthalmic and tacrolimus topical product .
| Diphenhydramine (Benadryl) | $5 (21 days) | |
| Methylprednisolone (Medrol) | $18 (21 days) | |
| Epinephrine | $76 (7 days) | |
| Famotidine | $10 (28 days) | |
| Cetirizine (Zyrtec) | $11 (28 days) | |
| Mometasone Nasal Product | ||
| Azelastine Nasal | ||
| Cimetidine | $8 (28 days) | |
| Olopatadine Ophthalmic | ||
| Levocetirizine (Xyzal) | $84 (28 days) | |
| Ketotifen Ophthalmic | ||
| Tacrolimus Topical Product |
Who is at risk?
Groups of people at highest risk for allergic reaction include age 5-14 years age 1-4 years.
Age
| < 1 years | 1.0x | |
| 1-4 years | 1.7x | |
| 5-14 years | 1.9x | |
| 15-29 years | 1.0x | |
| 30-44 years | 1.0x | |
| 45-59 years | 1.0x | |
| 60-74 years | 0.8x | |
| 75+ years | 0.3x |
Sex
| Male | 0.9x | |
| Female | 1.0x |
Race/Ethnicity
| Black | 1.0x | |
| Hispanic | 1.0x | |
| White | 1.0x | |
| Other | 1.1x |
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