Antidote neutralizes, counteracts poison effects, antihistamines treat allergic symptoms



Brompheniramine is an antihistamine drug of the propylamine class. It is readily available over the counter and is indicated for the treatment of the symptoms of the common cold and allergic rhinitis, such as runny nose, itchy eyes, watery eyes, and sneezing. It is a first-generation antihistamine. It has antidepressant properties, inhibiting reuptake of the neurotransmitter serotonin.

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Homochlorcyclizine is an antihistamine which has been marketed in Japan since 1965. It is used in the treatment of allergies and other conditions. It also has some anticholinergic, antidopaminergic, and antiserotonergic properties.


Dexchlorpheniramine is an antihistamine with anticholinergic properties used to treat allergic conditions such as hay fever or urticaria. It is the pharmacologically active dextrorotatory isomer of chlorpheniramine and seems to possess no advantage over the more common parent drug.

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Dimetindene Maleate

Dimetindene Maleate is a potent antihistamine with a prolonged duration of action. It is used in hypersensitivity reactions, rhinitis, pruritus, and in some common cold remedies, allergies, urticaria, and itching dermatoses.

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Rantidine Hydrochloride

Rantidine Hydrochloride is a competitive, reversible inhibitor of the action of histamine at the histamine H2-receptors, including receptors on the gastric cells. It does not lower serum Ca++in hypercalcemic states. Ranitidine hydrochloride is not an anticholinergic agent.It is absorbed very rapidly after intramuscular (IM) injection. Ranitidine hydrochloride is used for the treatment of active duodenal ulcer or for maintenance therapy for duodenal ulcer.

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Cetirizine Hydrochloride

Cetirizine Hydrochloride is an antihistamine that treats symptoms, such as itching, runny nose, watery eyes, and sneezing from hay fever (allergic rhinitis) and other allergies, such as allergies to molds and dust mites. It is available in generic form. Common side effects include: drowsiness, fatigue, dizziness, and dry mouth.

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