Allergic reactions rhinitis

Allergic Rhinitis inflammation of the mucous membranes in the nose that is caused by an allergic reaction. 

The symptoms of IgE-mediated allergic reactions -such as rhinitis, conjunctivitis and asthma - can be ameliorated by temporary suppression of... 

Blockade of histamine receptors. Allergic reactions are predominantly mediated by H receptors. Hi antihistamines (p. 114) are mostly used orally. Their therapeutic effect is often disappointing. Indications allergic rhinitis (hay fever). 

Naphazoline is used in severe rhinitis associated with colds, allergic reactions, and severe and chronic inflammatory conditions, in particular for inflammation of the antrum of Highmore as well as for stopping nosebleeds. Synonyms of naphazoline are nafazair, sanorin, rinazin, and privine. 

This drag lessens the allergic response of the organism caused by histamine. Tripelennamine is used for allergic symptoms, rhinitis, conjunctivitis, and for allergic and anaphylactic reactions. Synonyms of this drug are pelanin and pyribenzamine. 

Cyproheptadine has antianaphylactic activity that is associated with its ability to slow down the release of histamine and other mediators from fat cells. It is mainly used for treating bronchial asthma attacks, allergic bronchitis, rhinitis, and allergic skin reactions as well as in adjuvant therapy for anaphylactic reactions. Synonyms of this drug are periactin and vimicon. 

The most common use of the Hj-receptor antagonists is for the relief of allergic reactions such as rhinitis and urticaria. These compounds are also used to prevent mo-... 

Mechanism of Action An adrenocorticosteroid that inhibits the release of inflammatory cells into nasal tissue, preventing early activation of the allergic reaction. Therapeutic Effect Decreases response to seasonal and perennial rhinitis. Pharmacokinetics Undetectable in plasma. Protein binding 98%-99%. The swallowed portion undergoes extensive metabolism. Excreted primarily through bile and, to a lesser extent, urine. Half-life 5.8 hr (nasal). 

H5 ersensitivity reactions To prevent allergic reactions or to treat their symptoms, in which histamine is the primary mediator, the H -antagonists are the drugs of choice and are often quite effective. They are used primarily to treat allergic reactions produced by the release of histamine e.g., edematous states, pruritus, allergic rhinitis and urticaria. They are generally more effective in acute conditions and are used only for symptomatic relief. 

Allergic reactions Angioneurotic edema, asthma, bee stings, contact dermatitis, drug reactions, allergic rhinitis, serum sickness, urticaria... 

Antihistamines—a group of drugs which block the effects of histamine, a chemical released in body fluids during an allergic reaction. In rhinitis, antihistamines reduce itching, sneezing, and runny nose (allergy symptoms). 

Histamine—a chemical mediator present in cells throughout the body that is released during an allergic reaction. Histamine is one of the substances responsible for the symptoms of inflammation and is the major reason for running nose, sneezing, and itching in allergic rhinitis. 

Hay fever, or allergic rhinitis, is an allergic reaction induced by an immunoglobulin-mediated inflammatory response of the nasal mucosa to allergens, particularly pollen. 

Exposure to Aspergillus allergens in patients with atopy may lead to allergic reactions in the upper (rhinitis, sinusitis) or lower airways (Aspergillus asthma, ABPA). In the lower airways Aspergillus asthma is caused by a type I allergic... 

Evidence that a substance can induce specific respiratory hypersensitivity will normally be based on human experience. In this context, hypersensitivity is normally seen as asthma, but other hypersensitivity reactions such as rhinitis/conjunctivitis and alveolitis are also considered. The condition will have the clinical character of an allergic reaction. However, immunological mechanisms do not have to be demonstrated. 

Allergic reactions can occur after topical use, but are fairly rare. Allergic contact dermatitis has been reported in some cases. Allergic rhinitis on contact has also been reported. 

Workers in the coffee industry often develop allergic reactions, in the form of dermatitis, rhinitis, and bronchial asthma, on exposure to dust in the process of stripping the chaff from raw beans before roasting (2). This may or may not be a reaction to caffeine itself. 

---