Allergies Center
Allergic Reaction
An allergic reaction is the body's way of responding to an "invader." When the body senses a foreign substance, called an antigen, the immune system is triggered. The immune system normally protects the body from harmful agents such as bacteria and toxins. Its overreaction to a harmless substance (an allergen) is called a hypersensitivity reaction, or an allergic, reaction.
See the complete A-Z list of all the allergy related information or browse the current list of select resources.
Allergy Related Resources
Allergies (Allergy) Articles
Allergies Medications
acetaminophen and chlorpheniramine (Coricidin) acetaminophen and diphenhydramine (Anacin P.M. Aspirin Free, Coricidin Night Time Cold Relief, Excedrin PM and more) acetaminophen and phenyltoloxamine (Aceta-Gesic, Acuflex, Alpain and more) acetaminophen, clemastine, and pseudoephedrine (Tavist Allergy/Sinus/Headache) acetaminophen, diphenhydramine, and phenylephrine (Benadryl Allergy & Cold, Benadryl Allergy & Sinus Headache, Sudafed PE Severe Cold and more) acrivastine and pseudoephedrine (Semprex-D) azatadine (Optimine) azelastine nasal (Astelin, Astepro) beclomethasone nasal (Beconase AQ) brompheniramine (BroveX, BroveX CT, Dimetane and more) brompheniramine and pseudoephedrine (Andehist NR Syrup, Bidhist-D, Bromaline and more) budesonide nasal (Rhinocort Aqua) carbinoxamine (Palgic) cetirizine (All Day Allergy, All Day Allergy Children's, Indoor/Outdoor Allergy Relief and more) cetirizine and pseudoephedrine (All Day Allergy-D, Zyrtec-D) chlorpheniramine (AHist, Aller-Chlor, Allergy Relief and more) chlorpheniramine and codeine (Cotab A, Cotab AX, Notuss-AC and more) chlorpheniramine and methscopolamine (aeroHist, AlleRx DF Dose Pack, Ryneze) chlorpheniramine and phenylephrine (Allan Tannate Pediatric, Allerest PE, AlleRx and more) chlorpheniramine and pseudoephedrine (Allerest Maximum Strength, Dayquil Allergy, Deconamine and more) ciclesonide (nasal) (Omnaris) clemastine (Allerhist-1, Contac 12 Hour Allergy, Tavist and more) cromolyn sodium (inhalation) (Intal, Intal Inhaler) cromolyn sodium (nasal) (Nasalcrom, Nasalcrom Child) cromolyn sodium (oral) (Gastrocrom) cyproheptadine (Periactin) desloratadine (Clarinex, Clarinex Reditabs) desloratadine and pseudoephedrine (Clarinex-D 12 Hour, Clarinex-D 24 Hour) dexbrompheniramine and pseudoephedrine (Drixoral) dexbrompheniramine, hydrocodone, and phenylephrine (Cytuss-HC NR, H-C Tussive-NR, Histussin HC) dexchlorpheniramine and pseudoephedrine (AllerDur, Duotan PD, Tanafed DP) diphenhydramine and phenylephrine (Alahist LQ, Aldex-CT, Children's Triacting Night Time and more) diphenhydramine and pseudoephedrine (Benadryl Allergy Decongestant, Tavist NightTime Allergy) diphenhydramine, hydrocodone, and phenylephrine (Endal HD, Tussinate) emedastine ophthalmic (Emadine) epinastine ophthalmic (Elestat) epinephrine injection (Adrenalin, EpiPen 2-Pak, EpiPen Auto-Injector and more) fexofenadine (Allegra, Allegra ODT) fexofenadine and pseudoephedrine (Allegra -D 24 Hour, Allegra-D) flunisolide nasal (Nasarel) fluticasone nasal (Flonase, Veramyst) hydroxyzine (Vistaril) ipratropium (nasal) (Atrovent Nasal) levocetirizine (Xyzal) loratadine (Alavert, Claritin, Claritin 24 Hour Allergy and more) loratadine and pseudoephedrine (Claritin-D, Claritin-D 24 Hour) mometasone nasal (Nasonex) olopatadine (nasal) (Patanase) omalizumab (Xolair) phenylephrine (Ah-Chew D, Dimetapp Cold Drops, Lusonal and more) phenylephrine and promethazine (Phenergan VC, Promethazine VC Plain) phenylephrine and pyrilamine (Aldex D, Deconsal CT Tannate, K-Tan and more) phenylephrine nasal (Afrin 4 Hour Extra Moisturizing, Alconefrin-12, Alconefrin-25 and more) prednisolone (Bubbli-Pred, Flo-Pred, Hydeltrasol and more) prednisone (Meticorten, Sterapred, Sterapred DS) promethazine (oral) (Pentazine, Phenergan) promethazine (rectal) (Phenadoz, Promethegan) pseudoephedrine and triprolidine (Allerfrim, Allerphed, Altafed and more) triamcinolone (nasal) (Nasacort AQ) tripelennamine (PBZ, PBZ-SR) triprolidine (Zymine) xylometazoline nasal (Otrivin)
Allergies Images and Slideshows
Allergies Quizzes
Allergies News
Allergies A-Z List: Complete Listing of Allergy Related Information
