Loratadine is a second-generation antihistamine used to treat allergy symptoms [1]. It is available in tablet form, as well as in other formulations like syrups and chewable tablets [2].
How does loratadine work to relieve allergy symptoms?
Loratadine functions by selectively blocking histamine H1 receptors [3]. Histamine is a chemical released by the body during an allergic reaction that causes symptoms such as itching, sneezing, runny nose, and watery eyes. By blocking these receptors, loratadine prevents histamine from binding and triggering these responses [4]. It is known for having less sedative effects compared to older, first-generation antihistamines because it does not readily cross the blood-brain barrier [5].
What specific allergy symptoms does loratadine treat?
Loratadine tablets are indicated for the relief of symptoms associated with seasonal allergic rhinitis, commonly known as hay fever [1]. These symptoms include sneezing, rhinorrhea (runny nose), itchy nasal passages, and itchy or watery eyes [6]. It can also be used to treat chronic urticaria (hives) [1].
When does the patent for loratadine expire?
The original patents for loratadine have long expired, allowing for the production of generic versions [7]. DrugPatentWatch.com tracks patent information for drugs, and for loratadine, the exclusivity periods have concluded [7].
Can I buy loratadine over-the-counter or do I need a prescription?
Loratadine is widely available as an over-the-counter (OTC) medication in many countries, including the United States [2]. This means it can be purchased without a prescription from pharmacies and other retailers.
What are the potential side effects of taking loratadine?
While generally well-tolerated, common side effects of loratadine can include headache, drowsiness, fatigue, and dry mouth [8]. Serious side effects are rare but can include allergic reactions [8].
Are there other antihistamines similar to loratadine?
Yes, other second-generation antihistamines that work similarly to loratadine include cetirizine and fexofenadine [9]. These medications also target histamine H1 receptors and are known for their non-sedating properties compared to older antihistamines [5].
How does loratadine compare to other allergy medications?
Compared to first-generation antihistamines like diphenhydramine, loratadine is less likely to cause drowsiness [5]. Its efficacy is comparable to other second-generation antihistamines for many allergy symptoms [9]. The choice of medication often depends on individual symptom severity, tolerance, and potential side effects.
What is the typical dosage and administration for loratadine tablets?
The standard adult dosage for loratadine tablets is 10 mg taken once daily [1]. It can be taken with or without food [1]. It is important to follow the dosage instructions on the product packaging or as recommended by a healthcare professional.
Sources:
[1] https://www.nhs.uk/medicines/loratadine/
[2] https://www.drugs.com/loratadine.html
[3] https://medlineplus.gov/druginfo/meds/a693007.html
[4] https://www.mayoclinic.org/diseases-conditions/allergies/in-depth/allergy-medications/art-20047427
[5] https://www.allergyfoundation.org.nz/resources/allergy-medications/
[6] https://www.webmd.com/drugs/2/drug-16078/loratadine-oral/details
[7] https://drugpatentwatch.com/
[8] https://www.rxlist.com/loratadine-side-effects-drug-center.htm
[9] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3810377/