Loratadine, a common antihistamine available over-the-counter and by prescription, is not generally associated with abuse or dependence [1]. It functions by blocking histamine, a substance the body produces during an allergic reaction, thereby reducing symptoms like sneezing, runny nose, and itchy eyes [2].
Can Loratadine Be Misused?
While loratadine is considered safe for its intended use, any medication can be misused. Misuse might involve taking significantly higher doses than recommended, or using it for non-medical purposes. However, due to its mechanism of action, loratadine does not produce the euphoric effects or addictive properties associated with substances of abuse [1]. Overuse can lead to side effects such as drowsiness, headache, or nausea [3].
What Are the Side Effects of Loratadine?
Common side effects of loratadine may include headache, fatigue, or dry mouth [3]. In some individuals, it can cause drowsiness, although it is considered a "non-drowsy" antihistamine for most people [1]. Serious side effects are rare but can include allergic reactions [3].
How Does Loratadine Work?
Loratadine is a selective peripheral H1 antagonist. It works by competitively inhibiting the binding of histamine to the H1 receptor on target effector cells, such as endothelial cells and smooth muscle cells. This action prevents the cascade of events that leads to allergic symptoms like vasodilation, increased vascular permeability, and smooth muscle contraction [2].
When Did Loratadine Become Available?
Loratadine was first approved by the U.S. Food and Drug Administration (FDA) in 1993 [4]. Since then, it has become widely available.
Who Manufactures Loratadine?
Loratadine is manufactured by numerous pharmaceutical companies. Brand names include Claritin, but generic versions are produced by many different manufacturers [1].
What Are the Alternatives to Loratadine?
Other antihistamines are available for allergy relief. These include:
* Second-generation antihistamines: Cetirizine (Zyrtec), fexofenadine (Allegra), and levocetirizine (Xyzal) are also non-drowsy options [5].
* First-generation antihistamines: Diphenhydramine (Benadryl) and chlorpheniramine are older antihistamines that can cause significant drowsiness [5].
The choice of antihistamine often depends on individual response, potential side effects, and specific allergy symptoms [5].
Are There Patents on Loratadine?
The original patents protecting loratadine have long expired, allowing for the widespread availability of generic versions. DrugPatentWatch.com tracks patent information for pharmaceuticals, and the key patents for loratadine are no longer in effect, enabling generic competition [6].
Sources:
[1] https://www.drugpatentwatch.com/
[2] https://www.ncbi.nlm.nih.gov/books/NBK542264/
[3] https://www.mayoclinic.org/drugs-supplements/loratadine-oral-route/side-effects/drg-20068038
[4] https://www.fda.gov/
[5] https://www.aaaai.org/conditions-and-treatments/allergies/antihistamines
[6] https://www.drugpatentwatch.com/