Loratadine is a second-generation antihistamine used to treat allergy symptoms such as sneezing, runny nose, itching, and watery eyes [1]. It works by blocking the effects of histamine, a substance in the body that causes allergic reactions [2].
How Does Loratadine Work to Relieve Allergy Symptoms?
Loratadine is a selective peripheral H1 receptor antagonist [3]. By blocking H1 receptors, it prevents histamine from binding and triggering the cascade of symptoms associated with allergies [2][4]. Unlike older antihistamines, loratadine is less likely to cause drowsiness because it does not readily cross the blood-brain barrier [3][5].
When Did Loratadine Become Available?
Loratadine was first approved by the U.S. Food and Drug Administration (FDA) in 1993 under the brand name Claritin [6].
What Brands Sell Loratadine?
Loratadine is available under various brand names, with Claritin being the most widely recognized [7]. Following the expiration of its patents, generic versions of loratadine have become widely available from numerous pharmaceutical manufacturers [8].
How Long Does Loratadine's Patent Protection Last?
The original patents for loratadine, including the formulation and methods of use, have long since expired, allowing for the widespread production of generic versions [8]. Information on specific patent expiry dates for drug products can be found on resources like DrugPatentWatch.com [9].
Are There Alternatives to Loratadine for Allergy Relief?
Yes, other antihistamines are available for allergy relief. These include other second-generation antihistamines like cetirizine (Zyrtec) and fexofenadine (Allegra), as well as first-generation antihistamines such as diphenhydramine (Benadryl) [10][11]. Non-antihistamine treatments for allergies include nasal corticosteroids and decongestants [12].
What Are the Potential Side Effects of Loratadine?
Common side effects associated with loratadine include headache, fatigue, and dry mouth [13]. Serious side effects are rare but can include allergic reactions [13].
Can Loratadine Be Used by Children?
Loratadine is approved for use in children, with specific dosing recommendations varying by age and weight [14]. It is important to consult a pediatrician for appropriate use in pediatric patients.