Non sedating antihistamines otc

Each year, more than 37 million Americans suffer from sinusitis, which typically includes nasal congestion, thick yellow-green nasal discharge, facial pain, and pressure.

Many do not understand the nature of their illness or what produces their symptoms.

Your doctor can prescribe a “non-sedating” antihistamine to help manage your symptoms without drowsiness.

Many over-the-counter antihistamines cause drowsiness and carry warnings about mental alertness, especially while driving or operating machinery.

Skin sensations local itching or burning sensation, flushing and a disagreeable heat.

Stomach pain acid secretion increases; small intestine contracts with crampy pain Respiratory - nose swelling, congestion, sneezing and wheezing.

The manufacturers claim it to be more effective with fewer side effects than previous second-generation drugs; however, there have been no published studies supporting this assertion.

Histamine carries its message to a large number of cells by attaching to a special receptor on the cells' surfaces.

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non-sedating antihistamine, developed from the second-generation antihistamine cetirizine.

Chemically, levocetirizine is the active enantiomer of cetirizine. Levocetirizine is an inverse agonist that decreases activity at histamine H1 receptors.

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To get a good idea of what histamine can do, let us imagine the effects of an injection of a small amount of histamine: Headache is felt as a pulsating, whole-head pain, often with a sense of pressure.

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