As the name suggests, antihistamines block the action of histamine. Never drive or operate machinery when taking one of these drugs and be aware that the effect may persist for some time, or into the next day if you take a dose at night.
When someone has an allergy to a normally harmless substance like pollen or pet dander, the immune system treats it as if it were 'foreign' like a virus or bacterium. There is some evidence that people who regularly take sedating antihistamines are more likely to have a serious accident.
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Unlike many traditional antihistamines, it does not cause drowsiness or anticholinergic side effects.
Cetirizine, (2-(4-((4-Chlorophenyl)phenylmethyl)-1-piperazinyl)ethoxy)acetic Acid, Acetic acid, (2-(4-((4-chlorophenyl)phenylmethyl)-1-piperazinyl)ethoxy)-, cetirizine, Cetirizine [Chemical/Ingredient], CETIRIZINE, Cetirizine (product), Cetirizine (substance)A piperidine histamine H1-receptor antagonist with anti-allergic properties and without sedative effects.
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Antihistamines block histamines, thereby preventing some or all of the allergen's effects, but early antihistamines often caused drowsiness.
A non-sedating antihistamine is one that is less likely to cause patients to feel sleepy or tired.It responds to the perceived threat by unleashing a cascade of inflammatory molecules, one of which is histamine. These drugs may also affect your mental performance at work or school so it is better to opt for a non-sedating antihistamine if this is important to you, particularly if you have an important event like an exam or wedding coming up. The main side effect of the sedating antihistamines is, as you might expect, drowsiness.Because each patient can react differently, individuals should determine how they react to a non-sedating antihistamine before driving, taking important tests or operating dangerous machinery.Many types of antihistamines are available without a prescription. Yes, so always read the patient information leaflet thoroughly and keep it for future reference.