How Long Should You Take Antihistamine Tablets For?

Can antihistamines be taken long term?

The nonsedating antihistamines are typically used in extended or long term treatment of allergic disorders, including allergic rhinitis (hay fever), sinusitis, atopic dermatitis, and chronic urticaria.

The antihistamines have several adverse side effects which are related to their antihistaminic actions..

Are antihistamines bad for your heart?

Antihistamines, which are commonly used to treat symptoms such as a runny nose or sneezing, are generally safe for patients with abnormal heart conditions. However, the FDA has warned that antihistamines taken in conjunction with some high blood pressure medications may cause a spike in blood pressure.

Do antihistamines weaken your immune system?

Antihistamines, with their ability to disrupt the immune response that leads to annoying reactions like runny noses and swelling tissues, have long been considered the ideal way to control allergies. But their long-term effects on the immune system are unknown.

Can I take 2 antihistamines a day?

As well as taking a non-drowsy antihistamine during the day (such as cetirizine or loratadine), your doctor may advise that you take a sedating antihistamine at night time if the itch is making it difficult to sleep. Do not take 2 antihistamines together unless recommended by your doctor.

Which antihistamine is best for heart patients?

Therefore, advertised medicines such as Allegra, Zyrtec, or Claritin should be safe for most patients with heart disease and allergies; however, Allegra-D, Zyrtec-D, Claritin-D could cause problems for patients with allergies and heart disease.

How quickly do antihistamine tablets work?

Usually, antihistamine tablets start to work within 30 minutes after being taken and tend to be most effective within 1-2 hours after being taken. Antihistamines are more effective when taken regularly as a prevention, before symptoms occur, rather than only when you have symptoms.

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.

Is it okay to take antihistamine everyday?

Depending on your symptoms, you can take antihistamines: Every day, to help keep daily symptoms under control. Only when you have symptoms. Before being exposed to things that often cause your allergy symptoms, such as a pet or certain plants.

What drugs should not be taken with antihistamines?

Some products that may interact with this drug are: antihistamines applied to the skin (such as diphenhydramine cream, ointment, spray), blood pressure medications (especially guanethidine, methyldopa, beta blockers such as atenolol, or calcium channel blockers such as nifedipine).

Can too much antihistamine be bad?

Taking too much can be harmful for children and adults. Some people abuse the sedating antihistamines. They can cause seizures and hallucinations. Some antihistamines are combined with pain medicine.

What is the safest antihistamine?

Claritin and Zyrtec are popular over-the-counter antihistamines. Doctors consider them safe and effective treatments for minor allergies. Both are second-generation antihistamines. These cause less drowsiness than first-generation antihistamines.