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Ketotifen is an antihistamine medication and a mast cell stabilizer used to treat allergic conditions such as conjunctivitis, asthma, and urticaria (hives).Ketotifen is available in ophthalmic (eye drops or drug-eluting contact lenses) and oral (tablets or syrup) forms: the ophthalmic form relieves eye itchiness and irritation associated with seasonal allergies, while the oral form helps ...
Norketotifen is a pharmaceutical medication which is not yet approved for use and is undergoing clinical trials. It is a biologically active demethylated metabolite of ketotifen and has a similar potency as ketotifen as an antihistamine H 1 medication and a mast cell stabilizer, yet is devoid of severe sedative effects of ketotifen, potentially allowing for higher doses to be administered ...
10-Hydroxyketotifen (WR621365) [1] is a biologically inactive metabolite of ketotifen. [2] [3] [4] Despite the mainstream scientific consensus that 10-hydroxyketotifen is a biologically inactive compound, its pharmacological properties are not very well studied outside the context of ketotifen, therefore, 10-hydroxyketotifen may still possess biological activity similarly to norketotifen ...
Antihistamines are drugs which treat allergic rhinitis, common cold, influenza, and other allergies. [1] Typically, people take antihistamines as an inexpensive, generic (not patented) drug that can be bought without a prescription and provides relief from nasal congestion, sneezing, or hives caused by pollen, dust mites, or animal allergy with few side effects. [1]
There is evidence supporting its use for allergies, but second generation antihistamines such as ketotifen and loratadine have shown equal results with fewer side effects. [9] It is also used as a preventive treatment against migraine. In a 2013 study the frequency of migraine was dramatically reduced in patients within 7 to 10 days after ...
These compounds are structurally related to the ethylenediamines and the ethanolamines, and produce significant anticholinergic adverse effects with the exception of hydroxyzine, which has low to no affinity for muscarinic acetylcholine receptors and therefore produces negligible anticholinergic side-effects. [16]
There are few side effects related to the use of 5-HT 3 antagonists; the most common are constipation or diarrhea, headache, and dizziness. [28] Unlike antihistamines with antiemetic properties such as cyclizine , 5-HT 3 antagonists do not produce sedation , nor do they cause extrapyramidal effects , as phenothiazines (such as prochlorperazine ...
Clemastine, also known as meclastin, is a first-generation H1 histamine antagonist (antihistamine) with anticholinergic properties (drying) and sedative side effects. [1] Like all first-generation antihistamines, it is sedating. [2] [3] Patented in 1960, it came into medical use in 1967. [4]