Benadryl Special Warnings: People with glaucoma, peptic ulcer, urinary obstruction, enlarged prostate, asthma, chronic lung disease, an over-active thyroid, high blood pressure, or heart disease should use this allergy medication cautiously. Benadryl may cause excitability in young children. Do not give Benadryl to children younger than 6 years of age unless directed to do so by your doctor. People over 60 years of age are more likely to experience dizziness and low blood pressure. This allergy medication may cause drowsiness. Second Generation Oral Antihistamines The newer antihistamines, also known as second-generation antihistamines, are supposed to be less likely to cause the drowsiness associated with the original medications. They are sometimes referred to as “non-sedating.” Claritin has been recently made available over-the-counter, but most of the non-sedating antihistamines still require a prescription. In general, allergists will try to treat patients using these newer medications, but if they do not seem to work for an individual, doctors will often try the original, first generation antihistamines next. The newer, second generation antihistamines include: Zyrtec (cetirizine) Allegra (fexofenadine) Clarinex (desloratadine) Claritin (loratadine) Singulaire (montelukast) Featured: Zyrtec Zyrtec is a second-generation antihistamine that is less likely to cause drowsiness or impair motor abilities. Doctors prescribe this allergy medication to treat a wide variety of allergies such as: animal dander, mold, dust, hay fever, and skin conditions. Zyrtec works like other antihistamines, by blocking the effects of the biological chemical known as histamine, that can cause constricted air passages and inflammation. This type of allergy medication offers temporary relief from allergy symptoms and is very effective for some individuals. Zyrtec Dosage: Zyrtec comes in the form of a tablet or syrup to be taken by mouth. The usual dosage is just once a day, and may be taken on a regular basis, or just when the allergy season is most potent. Tablets are offered in 5 mg and 10 mg, while the syrup is labeled 5 mg/5mL. For adults 12 years and older, the typical starting dose is 5 or 10 mgs once per day. For children 6 to 11 years of age, the typical starting dose is 5 or 10 mgs per day, or one to two teaspoons of syrup. Zyrtec can be given to children as young as 6 months. Always check with your doctor for individual dosage instructions. Zyrtec Side Effects: The most common side effects associated with Zyrtec are as follows: Drowsiness Dry mouth Fatigue Abdominal pain (children) Coughing (children) Diarrhea (children) Headache (children) Nosebleed (children) Sleepiness (children) Sore throat (children) Wheezing (children) Zyrtec Special Warnings: Your dosage of Zyrtec may need to be reduced, if you have kidney or liver disease. Do not consume alcohol, sedatives, tranquilizers, sleeping pills, or muscle relaxants while taking Zyrtec. Combining Zyrtec with these substances can lead to serious drowsiness and reduced mental alertness. Even though it was designed to cause less drowsiness, this allergy medication can still cause moderate drowsiness in some individuals. Therefore you should not drive a motor vehicle or operate dangerous machinery until you know how your body reacts to Zyrtec. NASAL ANTIHISTAMINES This is a relatively new class of antihistamine, available only by prescription. This type of medication is sprayed directly into the nose. The nasal antihistamine is steroid free and can help patients have reduced symptoms for up to 12 hours. The first allergy medication of this type is known as Astelin (azelastine). The theory is that by spraying this drug directly into the nose, the concentration of the drug is increased where it is needed most. This may increase the patients’ relief from allergy symptoms. This type of drug does have some side effects, however. It can potentially cause headaches, drowsiness, and a bitter taste if the spray drips down from the nasal passages into the throat and mouth. It depends on what your doctor determines would be best for you, but even though oral antihistamines are the most popular choice for treating allergy symptoms, sometimes nasal antihistamines can be even more effective at reducing rhinitis symptoms such as sneezing, itchy, and runny nose. Featured: Astelin Astelin is administered as a nasal spray that focuses allergy medication where it is most needed. Doctors prescribe Astelin for allergy symptoms. Astelin is often used to treat hay fever symptoms, congested nasal passages, and post nasal drip. Again, like other antihistamines, Astelin works by blocking the effects of the biological chemical histamine, which causes allergy symptoms. This type of allergy medication offers temporary relief from allergy symptoms. No known allergy medications can “cure” allergies, but for some people these types of nasal sprays are very effective at suppressing unwanted symptoms Astelin Dosage Astelin is usually sprayed in each nostril two times a day. When you use this allergy medication for the first time, you have to first remove the child-resistant screw cap and install the included pump. You must then prime the pump until a mist is visible, before you administer the first dose. For adults 12 years and older, the typical dose is 2 sprays into each nostril twice a day. For children between 5 and 12 years of age, the usual dose is 1 spray in each nostril twice per day. In this age group, Astelin is not recommended for types of congestion other than hay fever symptoms. Astelin Side-Effects The most common side effects associated with Astelin are as follows: