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Allergic Reaction Topic Guide

Allergic Reaction Allergic Reaction: An allergic reaction is an overreaction to a harmless substance. Symptoms and signs of an allergic reaction include hives, rashes, swelling, itching, wheezing, nausea, and even anaphylactic shock in severe reactions. Treatment involves avoiding triggers, taking oral antihistamines, applying anti-inflammatory steroid creams, and using an EpiPen.
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Poison Ivy, Oak, and Sumac
Poison Ivy, Oak, and Sumac Poison ivy, poison oak, and poison sumac can causes an allergic reaction when someone comes in contact with the plant. This oil is called urushiol. The resulting rash appears one to three days after contact and may crust or ooze. Home remedies for the rash include applying cool compresses and calamine lotion, soaking in an Aveeno bath, and taking oral antihistamines.

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Allergic Reaction Topic Guide - Medications and Vitamins

Medications:

epinastine ophthalmic Epinastine Ophthalmic

Epinastine is an antihistamine that reduces the effects of natural chemical histamine in the body. Histamine can produce symptoms of sneezing, itching, wate...learn more »

desloratadine Desloratadine

Desloratadine is an antihistamine that reduces the effects of the natural chemical histamine in the body. Histamine can produce symptoms of sneezing, itchin...learn more »

flunisolide nasal Flunisolide Nasal

Flunisolide is a steroid. It prevents the release of substances in the body that cause inflammation...learn more »

fexofenadine and pseudoephedrine Fexofenadine And Pseudoephedrine

Fexofenadine is an antihistamine that reduces the effects of natural chemical histamine in the body. Histamine can produce symptoms of sneezing, itching, wa...learn more »

triamcinolone (nasal) Triamcinolone (nasal)

Triamcinolone is a steroid that prevents the release of substances in the body that cause inflammation...learn more »

fexofenadine Fexofenadine

Fexofenadine is an antihistamine that reduces the effects of natural chemical histamine in the body. Histamine can produce symptoms of sneezing, itching, wa...learn more »

cetirizine Cetirizine

Cetirizine is an antihistamine that reduces the effects of natural chemical histamine in the body. Histamine can produce symptoms of sneezing, itching, wate...learn more »

hydroxyzine Hydroxyzine

Hydroxyzine reduces activity in the central nervous system. It also acts as an antihistamine that reduces the effects of natural chemical histamine in the b...learn more »

cyproheptadine Cyproheptadine

Cyproheptadine is an antihistamine that reduces the effects of natural chemical histamine in the body. Histamine can produce symptoms of sneezing, itching, ...learn more »

promethazine (injection) Promethazine (injection)

Promethazine is in a group of drugs called phenothiazines (FEEN-oh-THYE-a-zeens). It works by changing the actions of chemicals in your brain.

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promethazine (rectal) Promethazine (rectal)

Promethazine is in a group of drugs called phenothiazines (FEEN-oh-THYE-a-zeens). It works by changing the actions of chemicals in your brain. Promethazine...learn more »

promethazine (oral) Promethazine (oral)

Promethazine is in a group of drugs called phenothiazines (FEEN-oh-THYE-a-zeens). It works by changing the actions of chemicals in your brain. Promethazine...learn more »

cromolyn sodium (ophthalmic) Cromolyn Sodium (ophthalmic)

Cromolyn sodium works by preventing the release of substances in the body that cause inflammation...learn more »

epinephrine injection Epinephrine Injection

Epinephrine is a chemical that narrows blood vessels and opens airways in the lungs. These effects can reverse severe low blood pressure, wheezing, severe s...learn more »

prednisone Prednisone

Prednisone is a steroid. Prednisone prevents the release of substances in the body that cause inflammation. Prednisone also suppresses the immune system......learn more »

diphenhydramine Diphenhydramine

Diphenhydramine is an antihistamine that reduces the effects of natural chemical histamine in the body. Histamine can produce symptoms of sneezing, itching,...learn more »

cromolyn sodium (oral) Cromolyn Sodium (oral)

Cromolyn sodium works by preventing the release of substances in the body that cause inflammation...learn more »

cromolyn sodium (inhalation) Cromolyn Sodium (inhalation)

Cromolyn sodium works by preventing the release of substances in the body that cause inflammation...learn more »

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