| D006967 |
Hypersensitivity |
Altered reactivity to an antigen, which can result in pathologic reactions upon subsequent exposure to that particular antigen. |
Allergy,Allergic Reaction,Allergic Reactions,Allergies,Hypersensitivities,Reaction, Allergic,Reactions, Allergic |
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| D005029 |
Ethylenediamines |
Derivatives of ethylenediamine (the structural formula NH2CH2CH2NH2). |
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| D005030 |
Ethylenes |
Derivatives of ethylene, a simple organic gas of biological origin with many industrial and biological use. |
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| D006632 |
Histamine |
An amine derived by enzymatic decarboxylation of HISTIDINE. It is a powerful stimulant of gastric secretion, a constrictor of bronchial smooth muscle, a vasodilator, and also a centrally acting neurotransmitter. |
Ceplene,Histamine Dihydrochloride,Histamine Hydrochloride,Peremin |
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| D006633 |
Histamine Antagonists |
Drugs that bind to but do not activate histamine receptors, thereby blocking the actions of histamine or histamine agonists. Classical antihistaminics block the histamine H1 receptors only. |
Antihistamine,Antihistamines,Histamine Antagonist,Antagonist, Histamine,Antagonists, Histamine |
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| D006634 |
Histamine H1 Antagonists |
Drugs that selectively bind to but do not activate histamine H1 receptors, thereby blocking the actions of endogenous histamine. Included here are the classical antihistaminics that antagonize or prevent the action of histamine mainly in immediate hypersensitivity. They act in the bronchi, capillaries, and some other smooth muscles, and are used to prevent or allay motion sickness, seasonal rhinitis, and allergic dermatitis and to induce somnolence. The effects of blocking central nervous system H1 receptors are not as well understood. |
Antihistamines, Classical,Antihistaminics, Classical,Antihistaminics, H1,Histamine H1 Antagonist,Histamine H1 Receptor Antagonist,Histamine H1 Receptor Antagonists,Histamine H1 Receptor Blockaders,Antagonists, Histamine H1,Antagonists, Histamine H1 Receptor,Antihistamines, Sedating,Blockaders, Histamine H1 Receptor,First Generation H1 Antagonists,H1 Receptor Blockaders,Histamine H1 Blockers,Receptor Blockaders, H1,Antagonist, Histamine H1,Classical Antihistamines,Classical Antihistaminics,H1 Antagonist, Histamine,H1 Antagonists, Histamine,H1 Antihistaminics,Sedating Antihistamines |
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| D000707 |
Anaphylaxis |
An acute hypersensitivity reaction due to exposure to a previously encountered ANTIGEN. The reaction may include rapidly progressing URTICARIA, respiratory distress, vascular collapse, systemic SHOCK, and death. |
Anaphylactic Reaction,Anaphylactoid Reaction,Anaphylactoid Shock,Shock, Anaphylactic,Anaphylactic Reactions,Anaphylactic Shock,Anaphylactoid Reactions,Reaction, Anaphylactic,Reaction, Anaphylactoid,Shock, Anaphylactoid |
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| D018926 |
Anti-Allergic Agents |
Agents that are used to treat allergic reactions. Most of these drugs act by preventing the release of inflammatory mediators or inhibiting the actions of released mediators on their target cells. (From AMA Drug Evaluations Annual, 1994, p475) |
Anti-Allergic,Anti-Allergic Agent,Anti-Allergy Drug,Antiallergic,Antiallergic Agent,Antiallergic Drug,Anti-Allergics,Anti-Allergy Drugs,Antiallergic Agents,Antiallergic Drugs,Antiallergics,Antiallergy Agents,Agent, Anti-Allergic,Agent, Antiallergic,Agents, Anti-Allergic,Agents, Antiallergic,Agents, Antiallergy,Anti Allergic,Anti Allergic Agent,Anti Allergic Agents,Anti Allergics,Anti Allergy Drug,Anti Allergy Drugs,Drug, Anti-Allergy,Drug, Antiallergic,Drugs, Anti-Allergy,Drugs, Antiallergic |
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