Sedating side effects

05-Mar-2018 03:16 by 8 Comments

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Antihistamines are a group of medicines which act by blocking the action of the chemical called histamine in the body.

For example, dry mouth, blurred vision and retention of urine.This is one of the most common uses of antihistamines. For example: Histamine is a chemical naturally produced by various cells in your body. Large amounts of histamine are made in cells called mast cells, in places where the body comes into contact with the outside environment. Here, mast cells and histamine form part of your immune defence system.(Whereas, in the stomach, histamine made by cells that line the stomach helps to produce acid for food digestion.) Your immune system cells monitor your blood and mucosae for anything (for example, germs such as bacteria or viruses) that is not made by your body.This can vary depending on the reason for treating you.If you have hay fever you may take the medicine throughout the pollen season.Chlorphenamine is the antihistamine most used in an emergency situation such as anaphylaxis, and may be given by injection in this situation.

Diphenhydramine (Nytol®) is sold over the counter as a sleep remedy.While this is a helpful response, it also causes redness, swelling and itching.Allergic reactions such as hay fever (seasonal allergic rhinitis) are caused by an oversensitivity or over-reaction of the immune system to a particular allergen.For example: For other conditions, specific antihistamines may be used.For example, cyclizine and promethazine teoclate are used for feeling sick (nausea) and being sick (vomiting), not for hay fever.They have a number of uses, but are most often used to treat allergies.