However, you should seek advice from your family doctor or other healthcare professionals before taking any medicines.

Histamines are released when your body defends against attack.

types of sedating antihistamines-63

Allergy is a condition when your body’s immune system overreacts to a substance that is usually harmless (allergen).

The allergen may be inhaled, ingested, injected or contacted.

Almost everyone has taken an antihistamine to treat hay fever, itching, to relieve nausea and vomiting, in tablets and syrups used to treat cough and cold symptoms, or as an aid to sleep.

The popularity of antihistamines is a mute testimony to the diverse negative effects of histamine.

Cyproheptadine is often associated with increase in appetite and weight gain.

(b) Examples of non-sedating antihistamines include cetirizine, desloratadine, fexofenadine and loratadine.(Please refer to the following link of the previous article ‘Information on oral corticosteroid for more detail: (iii) Decongestants relieve nasal congestion and thus provide symptomatic relief to allergic rhinitis and hay fever.They reduce swelling of blood vessels inside your nasal cavity in the upper airway to make breathing easier.These are newer antihistamines and generally cause little or no drowsiness due to their poor penetration into the central nervous system.(ii) The role of oral corticosteroids in the treatment of allergies is reserved only for severe cases, such as severe attacks of hives non-responsive to standard treatment and resistant severe eczema.There are many types of allergies, including atopic allergy (allergic rhinitis, eczema, and allergic conjunctivitis), food allergy (commonly caused by eggs, milk, seafood and nuts), insect sting allergy, drug allergy (most common allergens are penicillin-based antibiotics and vaccines) and environment allergy (pollen allergy and dust mite allergies).