If you try this, though, talk with your healthcare provider first. You might keep a journal to get an objective measure of which drug works best. For instance, you can write down your most annoying symptoms, and rank them from 1 to 10 based on how well they are controlled by different medications.
Talk with an allergist about the possibility of allergy testing and allergy shots. While allergy shots require more follow-up and more pokes they can sometimes cure allergies or at least significantly reduce their symptoms so that medications are no longer needed.
In addition, it's thought that allergy shots may sometimes help prevent the development of new allergies. First-generation antihistamines cross the blood-brain barrier , which can produce a sedative effect. However, not everyone feels sleepy when taking these.
Among second-generation antihistamines, the most potent are Xzal levocetirizine and Allegra fexofenadine , which are available over the counter. In the end, Claritin, Zyrtec, and Allegra are all good antihistamine options and are generally well-tolerated. But there are some differences between them, as outlined above, which may make one of these antihistamines better than the others depending on a person's needs and characteristics.
Sign up for our Health Tip of the Day newsletter, and receive daily tips that will help you live your healthiest life. A review of antihistamines used during pregnancy. J Pharmacol Pharmacother. Safety of antihistamines during pregnancy and lactation. Can Fam Physician. Cleveland Clinic. July 13, Pharmacology of antihistamines. World Allergy Organization Journal. Approved February 25, Approved November 27, Approved September 3, Your Privacy Rights.
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Drug features Side effects Warnings Takeaway We include products we think are useful for our readers. Understanding allergies.
The key features of each drug. Use the following table to compare the approved medical uses and off-label uses of Allegra and Claritin. Allegra and Claritin are both effective at relieving symptoms of allergic rhinitis compared to using no medication at all.
However, Claritin has been shown to provide more overall symptom relief compared to Allegra. It has also been shown to provide overall relief faster than Allegra.
According to a randomized, double-blind, clinical trial , Claritin was found to have a The trial compared both drugs in patients randomized to either therapy. Results showed that the active ingredient in Claritin produced a greater level of relief earlier than that of Allegra. In another randomized study , participants with seasonal allergic rhinitis were given either Claritin, Allegra, or placebo.
Results found that Allegra produced better relief of eye symptoms such as itchy, watery eyes compared to Claritin. While both drugs relieved nasal symptoms, Allegra was also found to improve the overall quality of life compared to Claritin.
Some reports say that Allegra has less sedative effects than Claritin and other antihistamines. However, one post-marketing study found that there was no significant difference in the level of sedation between Claritin and Allegra.
Both drugs were found to be appropriate for workers with jobs that require some level of alertness for safety, such as flight crew. Allegra and Claritin are not generally covered by insurance. Both drugs are over-the-counter OTC medications that can be purchased without a prescription. Get the SingleCare prescription discount card. Allegra and Claritin share some mild side effects such as headache, drowsiness, and fatigue.
These side effects are common with other second-generation antihistamines like Zyrtec cetirizine. However, Allegra may produce less drowsiness than Claritin and other antihistamines. Other common side effects of Allegra include dizziness, nausea, stomach ache, and back pain.
Claritin may also cause dry mouth. Serious side effects are rare with Allegra and Claritin. However, allergic reactions to any of the ingredients in either drug are possible.
Those with allergies to either drug may experience rash, swelling, or trouble breathing. Seek medical attention immediately if this occurs. Allegra and Claritin can interact with certain antibiotics and antifungal drugs. Both medications can interact with erythromycin and ketoconazole. When taken together, this interaction can cause increased levels of Allegra or Claritin in the body, which may increase the risk of side effects.
Allegra and Claritin can also interact with some antacids. Taking Allegra with antacids containing aluminum or magnesium, such as Maalox, can cause decreased levels of Allegra in the body. Taking Claritin with cimetidine can cause increased levels of Claritin in the body and may increase the risk of side effects.
Allegra is in pregnancy category C.
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