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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]
Antihistamines, specifically H1-antihistamines, are medicines which provide relief for allergic symptoms such as runny nose, sneezing, itching, and watery eyes from seasonal allergies . They are usually the first line of medications prescribed by a general practitioner, or a pharmacist for allergies in a community pharmacy.
Ophthalmic antihistamines (such as azelastine in eye drop form and ketotifen) are used for conjunctivitis, while intranasal forms are used mainly for sneezing, rhinorrhea, and nasal pruritus. [52] Antihistamine drugs can have undesirable side-effects, the most notable one being drowsiness in the case of oral antihistamine tablets.
It is a first-generation H 1-antihistamine and it works by blocking certain effects of histamine, which produces its antihistamine and sedative effects. [11] [2] Diphenhydramine is also a potent anticholinergic. [12] It is mainly used to treat allergies, insomnia, and symptoms of the common cold.
Cinnarizine's antagonistic effects of D2 dopamine receptors in the striatum leads to symptoms of depression, tremor, muscle rigidity, tardive dyskinesia, and akathisia. 17 of 100 new parkinsonism cases are linked to administration of either cinnarizine or flunarizine. [5] Drug induced parkinsonism is the second leading cause of parkinsonism. [22]
It is a first-generation antihistamine and works by blocking the histamine H 1 receptor. [2] Common side effects include sleepiness, restlessness, and weakness. Other side effects may include dry mouth and wheeziness. [2] Chlorpheniramine was patented in 1948 and came into medical use in 1949. [3] It is available as a generic medication and ...
Effects generally begin within thirty minutes and last for about a day. [12] The degree of benefit is similar to other antihistamines such as diphenhydramine, which is a first-generation antihistamine. [12] Common side effects include sleepiness, dry mouth, headache, and abdominal pain. [12]
It is an antihistamine drug used to relieve allergies. Its active ingredient is diphenhydramine, a first-generation antihistamine. It is known to be sedative, making drowsiness a common side effect. It is an oral drug to be taken by mouth, to relieve symptoms of allergy, hay fever and the common cold. [1]