Zyrtec d 10mg, 5mg, 20mg: Uses, Dosage, Side Effects, and Precautions

If you or your child suffers from allergy, then your doctor has probably prescribed Zyrtec D.  The generic name of this drug is Cetirizine HCL and it is classified as an antihistamine which is used to relieve symptoms of allergy such as runny nose, itching, watery eyes, itchy eyes, and sneezing. It has been proven safe to use and poses no risk during pregnancy. Keep in mind however that if you are pregnant, you should first consult a doctor before taking this medication.

Zyrtec 10mg

What are Allergies?

Allergies are especially common and experts say about 40% of Australians have some type of allergy. In a nutshell, an allergy is the body’s response to something that it considers harmful and this reaction triggers an inflammation in one part of the body such as the eyes, nose, lungs or skin.

An allergic reaction is a chain of events that cause symptoms such as swelling, itching, rashes, watery eyes, coughing, wheezing and so on. Such a reaction often starts when a person comes into contact with an allergen like pollen and dust mites.

There are tests that help determine if a person has allergies. These include skin tests, blood tests and diet control tests. Most medical providers recommend the skin test which is essentially done by dropping an allergen onto the skin through pricking. If that person is allergic to it, a small red rash will appear in 15 to 20 minutes.

If a person is found to have allergic tendencies, the doctor will prescribe an antihistamine which will help prevent or relieve symptoms. Among the most commonly prescribed treatment is a drug called Zyrtec.

How It Works

Medical professionals prescribe Cetirizine to treat conditions such as hay fever, allergic rhinitis and urticaria and it works by blocking the function of histamine, a chemical present in the body and in so doing, it reduces the allergy symptoms. If you are suffering from any of these symptoms, you might want to see a doctor so he can check if these reactions are triggered by an allergy. That way, the right treatment can be given.

Using Zyrtec d 10mg

While we don’t recommend that you self-treat, if you plan to buy the pills online or over the counter, make sure you read all the directions given in the product label before you begin your first dose. On the other hand, if you were given a prescription by your doctor, make sure to follow the directions he gave you.  Do not devise your own dosage.

Zyrtec is available in several dosage forms. They usually come in 1mg/mL syrup, 5mg and 10mg tablets, as well as 5mg and 10mg chewable tablets. If you are prescribed the chewable tablets, make sure to chew each tablet well. If the doctor prescribed the syrup version then check to ensure you are measuring the dose accurately.

Zyrtec works pretty well but if your symptoms do not improve after 3 days please see your doctor. Take note that this drug is not effective in treating serious allergic reactions such as anaphylaxis and difficulty breathing. If you experience these symptoms, go to the emergency room right away.

Side Effects of Zyrtec D

While it is generally considered safe to use, some users do complain of side effects which are mostly mild. Some experience dry mouth, tiredness and drowsiness. Children also report having stomach pains. If the side effects do not go away after a few days, please see your doctor or pharmacist.

Keep in mind that your physician has prescribed this drug because he considers the benefits to be greater than any possible side effects. Majority of users have not reported or experienced any severe side effects. However, if you experience weakness and difficulty urinating, call your doctor immediately.

In addition, even though serious allergic reactions to Zyrtec 10mg is rare, if you have severe dizziness, rash, swelling or itching of the throat and face, and difficulty breathing, get medical help ASAP.

Drug Interactions and Precautions

A drug interaction is basically changing the potency or effectiveness of your medication thereby increasing the risk of side effects. If you are taking other drugs, you should inform your doctor about it and give him a list of the medications. Zyrtec and most antihistamines should not be taken with alcohol, drugs for anxiety and sleep, muscle relaxants, and pain relievers such as codeine. You should also avoid using other antihistamines that are applied topically on the skin such as ointments, creams and sprays. Any drug that contains levocetirizine and hydroxyzine should be avoided if you are taking cetirizine.

Before and during treatment, you should also inform your doctor or pharmacist if you have a history of allergic reaction to levocetirizine or hydroxyzine. If you have any history of allergies at all, make sure your medical provider is made aware of it.

Tell your doctor if you have a history of difficulty urinating, if you have liver or kidney disease or if you are diabetic. Avoid driving or operating any machinery when taking Zyrtec because it can make you drowsy.

Even though the drug is deemed safe, if you are pregnant, use it only when needed and with advice from your doctor. Consult your doctor if you are breastfeeding and planning to take Zyrtec.

Buying Zyrtec d Online

The good news is, if you are suffering from allergy, you don’t have to go to a local drugstore to buy Zyrtec pills. That’s because you can buy this allergy medicine online.


Reputable online pharmacies like MyChemist sells Zyrtec 10mg tablets for only $39.95 for 70 tablets. Buying the tablets online is fast and easy, and you will receive your order in just a few days. This particular medication is safe to use for kids between 6 and 12 years old, as well as adults.


The merchant site also offers discount coupons for Zyrtec d pills (Zyrtec) during promotion. At the point of writing this article, there was no coupon offered for the medication.

Tired of your watery eyes, never-ending sneezing and itching? You can be symptom-free when you take Zyrtec 10mg! So what are you waiting for? Order Zyrtec online today!