When should I take antihistamines?
When should I take antihistamines?
When should I take antihistamines?
Antihistamines can ease your symptoms, but they work best when you take them before you feel a reaction. They can build up in your blood to protect against allergens and block the release of histamines. Ask your doctor if you should start taking allergy medicine a couple of weeks before you usually have symptoms.
What happens when you take antihistamines?
They cause the tissue in your nose to swell (making it stuffy), your nose and eyes to run, and your eyes, nose, and sometimes mouth to itch. Sometimes you may also get an itchy rash on your skin, called hives. Antihistamines reduce or block histamines, so they stop allergy symptoms.
What should you not take with antihistamines?
Examples of medicines that could cause problems if taken with antihistamines include some types of:
- antidepressants.
- stomach ulcer or indigestion medicines.
- cough and cold remedies that also contain an antihistamine.
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Do antihistamines thin your blood?
During an allergic reaction, histamines bind to receptors along the blood vessels, making them expand and become more permeable so white blood cells can attack the pathogen. Antihistamines block this mechanism, in effect narrowing the blood vessels.
What is an alternative to antihistamine?
A common herb in natural medicine, stinging nettle, may also be a natural antihistamine. In a 2000 study, 58 percent of participants found their symptoms relieved with the use of freeze-dried nettles, and 69 participants rated it better than the placebo. Stinging nettle can be found online and at health food stores.
Do antihistamines make you fat?
Antihistamines may also increase appetite, which can cause weight gain. Anecdotally, people using Xyzal (levocetirizine)—an antihistamine similar to Zyrtec (cetirizine)—they have noticed they have put on extra pounds, which is what a very small percentage of patients who used the drug during trials experienced.