Types of sedating antihistamines

There are two kinds of histamine receptors, H1 and H2.

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 sedating group act on brain H1 receptors where they cause sedative effects, a dangerous effect if you are driving, operating machinery, or otherwise need to be alert and vigilant.

Antihistamine sedative effects are increased by concurrent alcoholic beverage ingestion and by a long list of psychotropic drugs.

If you're struggling with chronic insomnia, don't rely on antihistamines or other over-the-counter sleep aids for a good night's sleep.

Start with lifestyle changes instead: If you continue to have trouble falling or staying asleep, consult your doctor.

The H1 block is useful to treat allergic reactions.

The older sedating antihistamines have been used for years and are cheap and effective.

Anxiety and agitation with diffuse, deep, odd body sensations:"..bones are on fire", "I feel weird all over", "...a deep pricking, crawling sensation...".

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