Non sedating antihistamine tablet dating wiffe
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"The first-generation antihistamines are more sedating, but the distinction isn't as black-and-white as the marketing of the newer products may lead you to believe.
The difference between them is really blurred." "Under some circumstances, the nonsedating formulas do cause sedation and in some cases, these sedating formulas do not," he tells Web MD.
Antihistamines are commonly used to treat the symptoms of allergies and reactions to bites and stings.
Antihistamines genrally come as tablets, creams, ointments and eye drops to reduce conditions such as watering, itchy eyes, running, itchy nose, sneezing, swelling and irritation of the eys, and to reduce hives, nettle rash and other allergic reactions.
Allergic symptoms occur when your body wrongly recognises a food or something (such as pollen spores) in your environment as a threat, and sends repair chemicals to deal to these perceived intruders.
One of these repair chemicals, histamine, is released from repair cells called mast cells, which are scattered throughout the body.
Scratching relieves the itch, but also makes the inflammation and the itching worse because it causes more inflammatory substances to be released within the skin.
"In some studies we reviewed, some people actually experienced more sedation with the newer, nonsedating formulas than with the older, sedating products.
Antihistamines are classified into two groups – the first-generation (“sedating”) and second-generation (“non-sedating”).
Antihistamines work by blocking the action of histamine which the body produces as part of its natural defences.
Histamine is released as a reaction to foreign substances (allergens), and starts a chain reaction that leads to the release of other chemicals that add to the allergic response. There are two different types of antihistamine; sedating antihistamines, which can enter the brain and cause drowsiness and non-sedating antihistamines which do not.