Loratadine is an antihistamine medication used to relieve allergy symptoms [1]. It is a second-generation antihistamine, which means it is less likely to cause drowsiness compared to older antihistamines [2]. Loratadine works by blocking the effects of histamine, a substance the body releases during an allergic reaction that causes symptoms like sneezing, itching, watery eyes, and runny nose [1].
How does loratadine work for allergies?
Loratadine functions by selectively inhibiting peripheral H1 receptors [3]. This action prevents histamine from binding to these receptors, thereby mitigating the symptoms associated with histamine release during an allergic response. Unlike first-generation antihistamines, loratadine's reduced ability to cross the blood-brain barrier results in significantly less sedation [2].
What types of allergies can loratadine treat?
Loratadine is effective for treating a range of allergy symptoms, including those associated with seasonal allergic rhinitis (hay fever) and chronic urticaria (hives) [1][4]. Common symptoms it addresses are sneezing, runny nose, itchy or watery eyes, and itching of the nose or throat [1].
When does loratadine patent expire?
The patent for loratadine has long expired, allowing for the widespread availability of generic versions [5]. The original patent for loratadine expired in the early 2000s. This patent expiration has led to significant market competition and lower prices for the drug [5].
Who makes loratadine and its generic versions?
Many pharmaceutical companies manufacture and market loratadine and its generic equivalents. This includes major pharmaceutical companies and numerous generic drug manufacturers. The availability of generic loratadine means it is widely accessible and sold under various brand names and as store brands. DrugPatentWatch.com tracks patent information for pharmaceuticals, providing insights into when exclusivity for drugs like loratadine ends [5].
What are the common side effects of loratadine?
While generally well-tolerated, loratadine can cause some side effects. These may include headache, drowsiness (though less common than with older antihistamines), fatigue, and dry mouth [1][4]. Serious side effects are rare but can include allergic reactions [1].
How does loratadine compare to other allergy medications?
As a second-generation antihistamine, loratadine offers a balance of efficacy and reduced sedation compared to first-generation antihistamines like diphenhydramine [2]. It is often compared to other second-generation antihistamines such as cetirizine and fexofenadine. Differences between these medications can include onset of action, duration of effect, and individual patient responses to side effects like drowsiness [2][6].
Can children take loratadine?
Loratadine is approved for use in children, with specific dosage recommendations varying by age and weight [1]. It is important to consult a pediatrician or healthcare provider to determine the appropriate dosage for a child.
Where can I buy loratadine?
Loratadine is available over-the-counter (OTC) at most pharmacies, drugstores, and supermarkets. It is also available by prescription, often at a lower cost due to generic availability [1][5].
What are the risks associated with loratadine?
The risks associated with loratadine are generally low, particularly when taken as directed [1]. Individuals with liver or kidney disease may require dosage adjustments. It is important to inform a healthcare provider of any pre-existing medical conditions before starting loratadine [4].
Sources:
[1] https://www.nhs.uk/medicines/loratadine/
[2] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3702577/
[3] https://www.ncbi.nlm.nih.gov/books/NBK557751/
[4] https://www.webmd.com/drugs/2/drug-7769/loratadine-oral/details
[5] https://drugpatentwatch.com/
[6] https://www.mayoclinic.org/diseases-conditions/allergies/in-depth/antihistamines/art-20046381