Antihistamine and Chlorphenamine

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Difference between Antihistamine and Chlorphenamine

Antihistamine vs. Chlorphenamine

Antihistamines are drugs which treat allergic rhinitis and other allergies. Chlorphenamine (also known as chlorpheniramine, CP, or CPM) is a first-generation antihistamine used in the prevention of the symptoms of allergic conditions such as rhinitis and urticaria.

Allergy

Allergies, also known as allergic diseases, are a number of conditions caused by hypersensitivity of the immune system to typically harmless substances in the environment.

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Brompheniramine

Brompheniramine (Bromfed, Dimetapp, Bromfenex, Dimetane, BPN, Lodrane), commonly marketed as its salt brompheniramine maleate, is an antihistamine drug of the propylamine (alkylamine) class.

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Dexbrompheniramine

Dexbrompheniramine is an antihistamine with anticholinergic properties used to treat allergic conditions such as hay fever or urticaria.

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Dexchlorpheniramine

Dexchlorpheniramine (trade name Polaramine) is an antihistamine with anticholinergic properties used to treat allergic conditions such as hay fever or urticaria.

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H1 antagonist

H1 antagonists, also called H1 blockers, are a class of medications that block the action of histamine at the H1 receptor, helping to relieve allergic reactions.

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Histamine

Histamine is an organic nitrogenous compound involved in local immune responses, as well as regulating physiological function in the gut and acting as a neurotransmitter for the brain, spinal cord, and uterus.

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Histamine H1 receptor

The H1 receptor is a histamine receptor belonging to the family of rhodopsin-like G-protein-coupled receptors.

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Histamine H2 receptor

H2 receptors are positively coupled to adenylate cyclase via Gs.

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Histamine H3 receptor

Histamine H3 receptors are expressed in the central nervous system and to a lesser extent the peripheral nervous system, where they act as autoreceptors in presynaptic histaminergic neurons, and also control histamine turnover by feedback inhibition of histamine synthesis and release.

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Histamine H4 receptor

The histamine H4 receptor is, like the other three histamine receptors, a member of the G protein-coupled receptor superfamily.

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Hives

Hives, also known as urticaria, is a kind of skin rash with red, raised, itchy bumps.

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Inverse agonist

In the field of pharmacology, an inverse agonist is an agent that binds to the same receptor as an agonist but induces a pharmacological response opposite to that agonist.

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Pheniramine

Pheniramine (INN, trade name Avil, among others) is an antihistamine with anticholinergic properties used to treat allergic conditions such as hay fever or urticaria.

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Receptor antagonist

A receptor antagonist is a type of receptor ligand or drug that blocks or dampens a biological response by binding to and blocking a receptor rather than activating it like an agonist.

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Symptom

A symptom (from Greek σύμπτωμα, "accident, misfortune, that which befalls", from συμπίπτω, "I befall", from συν- "together, with" and πίπτω, "I fall") is a departure from normal function or feeling which is noticed by a patient, reflecting the presence of an unusual state, or of a disease.

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