- Related Diseases
- Images & Quizzes
- 10 Common Allergy Triggers Slideshow Pictures
- Take the Quiz on Allergies
- Nasal Allergy Relief Products Slideshow
- What is loratadine, and how does it work (mechanism of action)?
- What brand names are available for loratadine?
- Is loratadine available as a generic drug?
- Do I need a prescription for loratadine?
- What are the uses for loratadine?
- What are the side effects of loratadine?
- What is the dosage for loratadine?
- Which drugs or supplements interact with loratadine?
- Is loratadine safe to take if I'm pregnant or breastfeeding?
- What else should I know about loratadine?
What is loratadine, and how does it work (mechanism of action)?
Loratadine is a long-acting, non-sedating antihistamine that is used for the treatment of allergies. Histamine is a chemical that causes many of the signs and symptoms of an allergy. Histamine is released from histamine-storing cells (mast cells) and attaches to other cells that have receptors for histamine on their surfaces. Histamine stimulates the cells to release chemicals that produce effects that we associate with allergy, including welts, itching, and tissue swelling. Loratadine blocks one type of histamine receptor (the H1 receptor) and thus prevents activation of cells with H1 receptors by histamine. Unlike some antihistamines, loratadine does not enter the brain from the blood and, therefore, does not cause drowsiness when taken at recommended doses. The FDA approved loratadine in April 1993.
What brand names are available for loratadine?
Claritin, Claritin RediTabs, Alavert, Claritin Hives Relief, Children's Claritin, and others
What are the uses for loratadine?
What are the side effects of loratadine?
The most common adverse events with loratadine are:
Nervousness and difficulty sleeping have also been reported.
Quick GuideBad Bugs: Identify Bug Bites From Mosquitos, Spiders and More
What is the dosage for loratadine?
The usual dose of loratadine is 10 mg daily for adults and children older than six years of age. The dose for children 2 to 6 years of age is 5 mg daily.
Which drugs or supplements interact with loratadine?
: Erythromycin, cimetidine (Tagamet), and ketoconazole (Nizoral) increase the blood concentration of loratadine by inhibiting the elimination of loratadine. This may result in increased adverse events from loratadine.
Is loratadine safe to take if I'm pregnant or breastfeeding?
What else should I know about loratadine?
What preparations of loratadine are available?
- Tablets: 10 mg.
- Tablets, disintegrating: 5 and 10 mg.
- Tablets, chewable: 5 mg.
- Syrup: 5 mg/5 ml.
How should I keep loratadine stored?
Tablets should be stored between 2 C and 30 C (36 F and 86 F), and syrup should be stored between 2 C and 25 C (36 and 77 F).
Reference: FDA Prescribing Information
Quick GuideBad Bugs: Identify Bug Bites From Mosquitos, Spiders and More
Daily Health News
Subscribe to MedicineNet's Allergy and Asthma Newsletter
Report Problems to the Food and Drug Administration
You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.
- loratadine, Claritin, Claritin RediTabs, Alavert, Claritin Hives Relief, Children's Claritin Related Diseases
- loratadine, Claritin, Claritin RediTabs, Alavert, Claritin Hives Relief, Children's Claritin Images & Quizzes
- loratadine, Claritin, Claritin RediTabs, Alavert, Claritin Hives Relief, Children's Claritin Index
Top loratadine Related ArticlesComplete List
Know Your Allergy TriggersAllergies are an overreaction of the immune system where the body's defenses react to substances such as pollen, food and more. Learn about common allergy triggers and how you can avoid an allergy attack.
AllergyAn allergy refers to a misguided reaction by our immune system in response to bodily contact with certain foreign substances. When these allergens come in contact with the body, it causes the immune system to develop an allergic reaction in people who are allergic to it. It is estimated that 50 million North Americans are affected by allergic conditions. The parts of the body that are prone to react to allergies include the eyes, nose, lungs, skin, and stomach. Common allergic disorders include hay fever, asthma, allergic eyes, allergic eczema, hives, and allergic shock.
Bed Bugs QuizThat unexplained itching could be caused by bedbugs. Take the Bedbugs Quiz to learn the causes and symptoms of a bedbug infestation.
Chronic rhinitis and post-nasal drip symptoms include:
- An itchy, runny nose
- Itchy ears, eyes, and throat
Seasonal allergic rhinitis (also called hay fever) usually is caused by pollen in the air. Perennial allergic rhinitis is a type of chronic rhinitis and is a yearâ€“round problem, often caused by indoor allergens, such as dust, animal dander, and pollens that may exist at the time. Treatment of chronic rhinitis and post nasal drip are dependent upon the type of rhinitis condition.
Cold, Flu, AllergyBefore treating a cold, the flu, or allergies with over-the-counter (OTC) medications, it's important to know what's causing the symptoms, which symptoms one wishes to relieve, and the active ingredients in the OTC product. Taking products that only contain the medications needed for relieving your symptoms prevents ingestion of unnecessary medications and reduces the chances of side effects.
Food AllergyThe most common food allergies are to eggs, nuts, milk, peanuts, fish, shellfish, strawberries and tomatoes. Symptoms and signs include nausea, vomiting, diarrhea, abdominal pain, itching, hives, eczema, asthma, lightheadedness, and anaphylaxis. Allergy skin tests, RAST, and ELISA tests may be used to diagnose a food allergy. Though dietary avoidance may be sufficient treatment for mild allergies, the use of an Epipen may be necessary for severe food allergies.
Hay FeverHay fever (allergic rhinitis) is an irritation of the nose caused by pollen and is associated with the following allergic symptoms: nasal congestion, runny nose, sneezing, eye and nose itching, and tearing eyes. Avoidance of known allergens is the recommended treatment, but if this is not possible, antihistamines, decongestants, and nasal sprays may help alleviate symptoms.
HivesHives, also called urticaria, is a raised, itchy area of skin that is usually a sign of an allergic reaction. The allergy may be to food or medications, but usually the cause of the allergy (the allergen) is unknown.
Allergy-Proof Your HomeTake this home allergy quiz and test your knowledge on allergens, dust mites, pollens and more to see how allergy-proof your home is.
Latex AllergyLatex allergy is a condition where the body reacts to latex, a natural product derived from the rubber tree. The reaction can either be delayed and cause a skin rash or immediate, which can lead to anaphylaxis. Avoiding latex is the most effective way to prevent an allergic reaction.
Lichen PlanusLichen planus is a common skin disease that features small, itchy pink or purple spots on the arms or legs. the abnormal areas on the skin in lichen planus are typically flat-topped (hence the term planus), itchy, and frequently have a polygonal or angular shape.
Nasal Allergy ReliefLearn how a combination of medication, preventing allergens, and allergy relief products can reduce allergy symptoms and help you feel better.
Pink EyePinkeye, also called conjunctivitis, is redness or irritation of the conjunctivae, the membranes on the inner part of the eyelids and the membranes covering the whites of the eyes. These membranes react to a wide range of bacteria, viruses, allergy-provoking agents, irritants, and toxic agents.
RashThe word "rash" means an outbreak of red bumps on the body. The way people use this term, "a rash" can refer to many different skin conditions. The most common of these are scaly patches of skin and red, itchy bumps or patches all over the place.
Urticaria PictureThis is a close-up view of wheals with white-to-light-pink color centrally and peripheral erythema. See a picture of Urticaria and learn more about the health topic.
Worst Allergy CitiesSee pictures of the top 10 "spring allergy capitals", according to the Asthma and Allergy Foundation of America (AAFA). From coast to coast, see if your city made the top 10.