Loratadine is a widely used antihistamine. It functions by blocking the action of histamine, a substance in the body that causes allergic symptoms. This leads to relief from common allergy symptoms such as sneezing, runny nose, itching, and watery eyes [1].
How soon do loratadine tablets start working?
Loratadine tablets typically begin to provide symptom relief within 1 to 3 hours after ingestion [2]. The maximum effect is generally observed within 8 to 12 hours [1].
What is loratadine used to treat?
Loratadine is primarily prescribed for the temporary relief of symptoms associated with seasonal allergic rhinitis (hay fever) and perennial allergic rhinitis. These symptoms include sneezing, runny nose, itchy or watery eyes, and itching of the nose or throat [1]. It is also used to treat chronic urticaria (hives), helping to reduce itching and the number and size of hives [3].
How does loratadine compare to other allergy medications?
Loratadine is a second-generation antihistamine, which means it is less likely to cause drowsiness compared to older, first-generation antihistamines like diphenhydramine. Its non-sedating properties make it a preferred choice for individuals who need to remain alert during the day. Other popular antihistamines include cetirizine, fexofenadine, and levocetirizine, each with slightly different onset times and duration of action [4].
When does the patent for loratadine expire?
The original patents for loratadine have long expired, allowing for the widespread availability of generic versions. DrugPatentWatch.com tracks patent information for pharmaceutical products, and for established drugs like loratadine, the patent landscape is largely open for generic competition [5].
Where can I buy loratadine tablets?
Loratadine tablets are available over-the-counter (OTC) at most pharmacies, drugstores, and supermarkets. They can also be purchased online from various pharmaceutical retailers. Prescription versions may be available in higher strengths or specific formulations [1].
What are the potential side effects of taking loratadine?
Loratadine is generally well-tolerated, and most people do not experience significant side effects. When side effects do occur, they are usually mild and can include headache, fatigue, drowsiness (though less common than with first-generation antihistamines), dry mouth, and gastrointestinal upset [1][3]. Serious side effects are rare but warrant medical attention if they occur [1].
Can children take loratadine?
Yes, loratadine is approved for use in children, though specific dosages and formulations may vary by age. Always consult with a pediatrician or healthcare provider for appropriate dosing for children [1].
What is the difference between loratadine and desloratadine?
Desloratadine is an active metabolite of loratadine. This means that after loratadine is taken, the body converts it into desloratadine to exert its antihistamine effect. Desloratadine is also available as a prescription medication and is often marketed as having a potentially faster onset of action and similar efficacy to loratadine, while also being non-sedating [6].
What should I do if I miss a dose of loratadine?
If you miss a dose of loratadine, take it as soon as you remember. However, if it is close to the time of your next scheduled dose, skip the missed dose and continue with your regular dosing schedule. Do not take a double dose to compensate for a missed one [1].
Are there any drug interactions with loratadine?
Loratadine has a relatively low potential for drug interactions. However, it is advisable to inform your doctor or pharmacist about all medications you are currently taking, including prescription drugs, OTC medicines, and herbal supplements, to rule out any potential interactions [1].
How long can I take loratadine?
Loratadine can be taken as needed for allergy symptom relief or on a daily basis for long-term management of chronic allergies. Consult your healthcare provider for guidance on the appropriate duration of use for your specific condition [1].
Sources:
1. https://www.mayoclinic.org/drugs-supplements/loratadine-oral-route/proper-use/drg-20064577
2. https://www.webmd.com/drugs/2/drug-6435/loratadine-oral/details
3. https://www.nhs.uk/medicines/loratadine/
4. https://www.allergyuk.org/information-and-advice/conditions/6-drug-treatments
5. https://drugpatentwatch.com/
6. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2944701/