Search results
Results from the WOW.Com Content Network
It is unclear if use is safe during pregnancy or breastfeeding. [9] It is a second-generation antihistamine and works by blocking the release of a number of inflammatory mediators including histamine. [7] [8] Azelastine was patented in 1971 and came into medical use in 1986. [10] It is available as a generic medication.
Cetirizine is a second-generation antihistamine used to treat allergic rhinitis (hay fever), dermatitis, and urticaria (hives). [5] It is taken by mouth. [6] Effects generally begin within thirty minutes and last for about a day. [6] The degree of benefit is similar to other antihistamines such as diphenhydramine, which is a first-generation ...
Use during pregnancy appears to be safe but has not been well studied. [7] It is not recommended in children less than two years old. [6] It is in the second-generation antihistamine family of medications. [5] Loratadine was patented in 1980 and came to market in 1988. [8] It is on the World Health Organization's List of Essential Medicines. [9]
Levocetirizine, sold under the brand name Xyzal, among others, is a second-generation antihistamine used for the treatment of allergic rhinitis (hay fever) and long-term hives of unclear cause. [3] It is less sedating than older antihistamines. [4] It is taken by mouth. [3] Common side effects include sleepiness, dry mouth, cough, vomiting, and ...
Astemizole (marketed under the brand name Hismanal, developmental code R43512) was a second-generation antihistamine drug that has a long duration of action. Astemizole was discovered by Janssen Pharmaceutica in 1977.
Second generation antihistamines include loratadine (Claritin), cetrizine (Zyrtec), and fexofenadine (Allegra). [12] First generation antihistamines have the ability to cross the blood-brain barrier which can result in sedative and anticholinergic effects while effectively treating allergic reactions and nausea and vomiting related to pregnancy.
Second-generation antihistamines selectively bind to the peripheral H-1 receptors outside the blood-brain barrier, therefore they are less likely to cause sedation. First-generation antihistamines usually last around 4–6 hours whilst second-generation antihistamines work for 12–24 hours. [ 7 ]
It is classified as a second-generation antihistamine because it is less able to pass the blood–brain barrier and cause sedation, compared to first-generation antihistamines. [12] [13] It was patented in 1979 and came into medical use in 1996. [14] It is on the World Health Organization's List of Essential Medicines. [15]