As the name suggests, antihistamines prevent the body from producing histamines, which cause your nose to run. Antihistamines dry out the mucus membranes in your nasal passages . You can try over-the-counter antihistamines that contain agents such as loratadine or diphenhydramine. Common antihistamines are Allegra, Claritin, Zyrtec, Benadryl, Phenergan, and Clarinex. Benadryl is likely to cause some sedation, while Claritin tends to cause the least. Take the necessary precautions when using a medication that may cause drowsiness. Your doctor will be able to prescribe an allergy medicine. He or she will prescribe either an antihistamine, a corticosteroid (nasal spray), various decongestants, a leukotriene inhibitors, or allergy shots. These shots are sometimes recommended if you cannot avoid pollen or other allergens. The goal is to acclimate your body to the presence of certain allergens.  Remember that prescription-strength antihistamines are indeed stronger, and they also come with stronger side effects such as anxiety, diarrhea, increased blood pressure, and even insomnia.  Studies show that daily use of corticosteroid nasal sprays can be very effective in reducing nasal symptoms caused by allergies. Some sprays, such as Flonase and Nasacort, are also available without a prescription. Don't overuse decongestant nasal sprays. rebound congestion of the nasal mucosa when you try to stop using them, and this may cause a dependency on nasal sprays.  Visit your doctor if you have severe allergy symptoms, increased wheezing or coughing, or if your symptoms do not respond to treatment. Use a saline nasal spray. Saline nasal sprays can help keep the mucus membranes moist. They are available over the counter without a prescription, and they work both to keep the mucus membranes moist and flush irritants out of your nasal passages. Some people prefer to make their own saline spray. Sprinkle some salt in a cooking pan with 1 cup of water, 1/2 tsp of salt, and a pinch of baking soda. Then bring your concoction to a...

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Write a summary of the previous text in Vietnamese:
Uống thuốc kháng histamine. Khám bác sĩ. Làm sạch mũi. Dùng bình rửa mũi. Uống thật nhiều nước. Dùng phương thuốc từ thảo mộc. Làm ẩm không khí.