Non sedating allergy
In some individuals the rash persists over weeks and months and this chronic form may require specialist intervention to allow the condition to be appropriately treated.
Join BSACI to receive the regular BSACI Allergy Update, have online access to the monthly journal 'Clinical & Experimental Allergy’, download our popular guidelines and a discount to the BSACI Annual Meeting.
Skin sensations local itching or burning sensation, flushing and a disagreeable heat.
Stomach pain acid secretion increases; small intestine contracts with crampy pain Respiratory - nose swelling, congestion, sneezing and wheezing.
There are two kinds of histamine receptors, H1 and H2.
These receptors both receive histamine as a messenger, but the meaning conveyed is different.
Sensitivities vary widely from one person (or other animal) to another.
So concludes a new study published in the current issue of Journal of Allergy and Clinical Immunology in which researchers compared 18 previous trials investigating antihistamine-caused sedation levels in 1,500 people between ages 8 and 81.
Most of the studies reviewed used doses that were twice the recommended amount -- 50 milligrams -- of diphenhydramine, the active ingredient in Benadryl and other first-generation "sedating" allergy medications.
An allergen is a type of antigen that produces an abnormally vigorous immune response in which the immune system fights off a perceived threat that would otherwise be harmless to the body. In technical terms, an allergen is an antigen capable of stimulating a type-I hypersensitivity reaction in atopic individuals through Immunoglobulin E (Ig E) responses.
Most humans mount significant Immunoglobulin E responses only as a defense against parasitic infections.