Loratadine (Claritin): Uses, Dosage, and Safety
Quick summary Loratadine is an antihistamine used for allergy symptoms and urticaria (hives). In the United States, common brand names include Claritin and Alavert. It is taken by mouth and can be taken with...
This content is for educational purposes only and does not replace medical advice, diagnosis or treatment from a qualified healthcare professional.
Quick summary
Loratadine is an antihistamine used for allergy symptoms and urticaria (hives). In the United States, common brand names include Claritin and Alavert. It is taken by mouth and can be taken with or without food.
Medical disclaimer: This article is for general information only. It does not replace the advice of a doctor, pharmacist, or the official medication guide. If symptoms persist, worsen, or you are unsure whether loratadine is appropriate, seek professional guidance.
What is loratadine?
Loratadine is an active ingredient used for allergy treatment and urticaria. It is an antihistamine that acts on peripheral H1 receptors.
In the United States, common brand names include Claritin and Alavert.
How loratadine works
Loratadine is described as a tricyclic antihistamine with selective activity on peripheral H1 receptors. In practical terms, it helps reduce symptoms linked to allergic processes.
What loratadine is used for
The original content describes loratadine as being used for the symptomatic and temporary relief of allergic processes caused by pollen, domestic animals, dust, or other agents.
It is also used for the symptomatic treatment of allergic rhinitis and chronic idiopathic urticaria.
Dosage information
Oral use. The following dosing information was listed in the source content:
| Group | Dose listed in source |
|---|---|
| Adults and children over 12 years | 10 mg once daily |
| Children 2 to 12 years, under 6 years only under medical supervision | If body weight is over 30 kg: 10 mg once daily; if body weight is 30 kg or less: 5 mg once daily |
| Severe liver failure | Lowest initial dose, as indicated, every other day |
It can be taken independently of meals.
Contraindications
The source content lists hypersensitivity as a contraindication.
Warnings and precautions
Important precautions listed in the source include:
- Severe liver failure: caution is advised.
- Persistent or worsening symptoms: clinical evaluation should be considered if symptoms continue after 7 days of treatment.
- Children under 6 years: use only under medical supervision.
- Children under 2 years: safety and efficacy have not been established.
Liver failure
In severe liver failure, the source advises using the lowest initial dose and giving it every other day, as indicated.
Interactions
The source content notes possible increased levels and adverse reactions with CYP3A4 or CYP2D6 inhibitors.
It also notes a laboratory interaction: loratadine may cause a false result in skin tests by preventing or decreasing the dermal reaction. The source advises suspending it for at least 48 hours before testing.
Pregnancy and breastfeeding
Pregnancy
The source states that loratadine is not recommended in pregnancy because safety has not been established, even though it did not show teratogenic effects in animals.
Breastfeeding
The source states that loratadine and its active metabolite are excreted in breast milk, so its administration in lactating women is not recommended.
Effects on driving ability
Clinical trials evaluating driving ability did not show a decrease in driving performance in patients receiving loratadine. However, the source notes that very rarely some people may experience drowsiness, which could affect driving or use of machines.
Adverse reactions and side effects
The source content lists the following side effects:
- Children 2 to 12 years: headache, nervousness, tiredness.
- Adults: drowsiness, headache, increased appetite, insomnia.
- Also noted: weight gain in children.
What to verify with a doctor or pharmacist
If you are reviewing loratadine for yourself or someone else, it is useful to confirm the following with a healthcare professional or the official leaflet:
- Whether the product is appropriate for the age group.
- Whether liver problems change the usual dosing schedule.
- Whether any other medicines may interact with loratadine.
- Whether pregnancy or breastfeeding changes the recommendation.
- Whether symptoms need medical review instead of self-care.
FAQ
▸ What is loratadine used for?
The source content says loratadine is used for allergy symptoms and urticaria, including allergic rhinitis and chronic idiopathic urticaria.
▸ Is loratadine taken with food?
The source states that it can be taken independently of meals.
▸ Can loratadine cause drowsiness?
The source notes that drowsiness is very rare, but it may happen in some people and could affect driving or machine use.
▸ Is loratadine used in children?
The source includes dosing for children 2 to 12 years and says children under 6 years should use it only under medical supervision. Safety and efficacy are not established under 2 years.
▸ Does loratadine interact with allergy skin tests?
Yes. The source says it may reduce the skin test reaction and should be suspended for at least 48 hours before testing.
Safety reminder
If symptoms persist, worsen, or do not match the expected pattern of allergies, seek medical advice. Always check the official medication guide and confirm any personal concerns with a pharmacist or doctor, especially for children, pregnancy, breastfeeding, liver problems, or possible drug interactions.
Sources and references
- FDA Medication Guides
- UNII: 7AJO3BO7QN
- ChemIDplus
- DrugPortal
- PubChem CID: 3957
- NCI Thesaurus: C29162
Medical disclaimer
This content is for educational purposes only. It should not be used as a substitute for professional medical advice, diagnosis or treatment. Always ask a doctor, pharmacist or qualified healthcare professional before starting, stopping or changing any medicine.
Sources and verification
The following sources or official references are listed to support verification of the medicine information discussed in this article.
Medicine information can change and may vary depending on country, product formulation, patient history and professional guidance. Always check official medicine information and ask a healthcare professional for personal medical questions.