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How Antihistamines are used for Allergy Treatment

May 31, 2019Blog

All allergies are different and there are several treatments and medications used to treat all of the different types such as antihistamines. These allergy types include: seasonal, indoor, and food allergies. The first thing that is recommended to combat allergies at their simplest form is using antihistamines. Antihistamines can aid in relieving many of the symptoms of different types of Allergies, but cannot relieve every symptom.

allergy medicine


Typically, when you come in contact with one of your major allergy triggers, such as dust mites, ragweed, cottonwood, pet dander, or pollen, your body produces histamines. This causes swelling of the tissues in your nose, eyes, or throat. This results in itchy eyes, nose, and mouth, and can sometimes cause a rash or hives to appear on your skin. This is where antihistamines come in handy. The block or reduce histamines, hence the name, which results in your allergy symptoms either slowing down, or stopping completely. They tend to work well for most allergies, but do not relieve every symptom. For example, nasal congestion may require a decongestant or a combination decongestant and antihistamine.

Side Effects of Antihistamines

Different antihistamines have different side effects. Newer ones have less. Older ones tend to have more such as drowsiness. Side effects include:

  • Blurred vision
  • Confusion
  • Dry mouth
  • Drowsiness
  • Dizziness
  • Nausea or vomiting
  • Restlessness or moodiness
  • Trouble urinating

Knowing the symptoms ahead of time will help with your daily routine. It might not be the best idea to take one that will cause drowsiness in the morning, driving, or when operating heavy machinery.

Types of Antihistamines

Antihistamines come in a variety of forms. The typical forms include: tablets, capsule, liquids, nasal sprays, and eye drops. Most are available over the counter, but some are only available with a prescription. If you are in need of a prescription, give us a call!

If you have any questions, please contact us for recommendations from Dr. Hari Reddy at Allergy and Asthma Associates of Allen.

You can learn more about antihistamines here.

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