Claritin, known generically as loratadine, is an antihistamine that works by blocking the action of histamine [1]. Histamine is a substance the body releases during an allergic reaction, which causes allergy symptoms like sneezing, runny nose, itchy eyes, and hives [1]. Claritin specifically acts as a selective peripheral H1-receptor antagonist [1]. This means it binds to H1 receptors, which are located outside of the central nervous system, and prevents histamine from attaching to them [1]. By doing so, it effectively stops histamine from triggering the allergic response and alleviates symptoms [1].
How quickly does Claritin start working?
Claritin typically begins to relieve allergy symptoms within 1 to 3 hours after administration [1]. Its peak effect, meaning the time when it is most effective, is usually observed around 8 hours after taking the medication [1].
What are the different forms of Claritin available?
Claritin is available in several forms, including non-drowsy tablets, chewables, and syrup [1]. These various formulations allow for different methods of administration and cater to different age groups and preferences.
Are there any side effects associated with Claritin?
Common side effects reported with Claritin use include headache, drowsiness, fatigue, and dry mouth [1]. However, it is known for being a "non-drowsy" formulation compared to older antihistamines, with drowsiness occurring less frequently [1].
How does Claritin compare to other antihistamines?
Claritin (loratadine) is a second-generation antihistamine. Compared to first-generation antihistamines like diphenhydramine (Benadryl), Claritin causes less sedation because it does not readily cross the blood-brain barrier [1]. This selective action on peripheral H1 receptors is a key differentiator. Other second-generation antihistamines include cetirizine (Zyrtec) and fexofenadine (Allegra), which also aim to provide symptom relief with reduced drowsiness.
Who makes Claritin?
Claritin is manufactured by Bayer HealthCare, following its acquisition of Schering-Plough, the original developer of loratadine [2].
When does the patent for Claritin expire?
The original patents for loratadine have long expired, allowing for the widespread availability of generic versions of Claritin [3]. This patent expiry has led to increased accessibility and affordability of the medication.
What are the clinical data findings for Claritin?
Clinical studies have demonstrated that loratadine is effective in treating symptoms associated with allergic rhinitis (hay fever) and chronic urticaria (hives) [1]. Its efficacy is attributed to its ability to block histamine-induced effects, such as vasodilation and smooth muscle contraction that contribute to allergy symptoms [1].
What are the regulatory approvals for Claritin?
Claritin (loratadine) is approved by regulatory agencies such as the U.S. Food and Drug Administration (FDA) for the symptomatic treatment of allergic conditions [1].
What are patient concerns regarding Claritin?
Patient concerns often revolve around the effectiveness for severe allergies, potential for drowsiness in sensitive individuals, and the cost of brand-name versus generic versions [1]. While generally well-tolerated, some patients may experience side effects or find it less effective than other options, leading them to explore alternatives.
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1. DrugPatentWatch.com
2. Bayer HealthCare
3. Generic drug pricing information