How does Zyrtec work?

The exact function of Zyrtec is still not known.But it is thought that this medication work by pausing the secretion of histamine in the brain.It occurs by the competition between cetrizine and free histamines for binding with receptors (HA). Therefore, it decreases the affinity of natural chemical histamines of binding with of HA receptors. So when the allergens attack you, they cannot reacts to them. Thus it reduces the symptoms associated with allergy.

What are the indications of Zyrtec?

• In allergic reactions like runny nose, itching, watery eyes or sneezing.
• For the treatment of cold.
• In urticaria.

What are the contraindications of Zyrtec?

• This medication is not used if the patient is allergic to any component of the preparation.
• If the patient is hepatic or liver diseases like liver failure or liver cirrhosis, consult with your doctor before taking this medication.
• If you are suffering from any kidney disorder, talk to your doctor before using Zyrtec.
• Safety and efficacy is not yet confirmed for use in pregnancy and lactation period, so ask your doctor if you need to take this medication.
• Above the age of 65 years, because older patients has a tendency to exhibit liver or kidney disease.
• It cannot be used in children under the age of 2 years.

What are the drug interactions of Zyrtec?

Zyrtec can interact with the following drugs:

• Antidepressants,
• Narcotics,
• Sleep or anxiety medications
• Theophylline
• Medications for nausea or vomiting.
• Antipsychotic

What are the side effects of Zyrtec?

Some of the possible common side effects of this medication are;

• Dry mouth
• Dizziness
• Fatigue
• Sore throat
• Abdominal pain
• Stomach upset
• Cough
• Epistaxis or bleeding from nose
• Headache.
• Diarhea

Serious side effects:

• Difficulty in breathing
• High blood pressure
• Difficulty in urination
• Increased heart rate
• Anxiety
• Confusion
• Skin rashes or skin bumps

What are the dosage and method of taking Zyrtec?

The most recommended dose in adult is 5mg. But depending on the severity of the condition, it can be increased up to 10 mg.

Modified dose for the children of 6-12 years who suffers from liver and kidney disease:

• Recommended dose is 2.5mg once daily.
• Children above the age of 12 years-5mg.

How should you store this medication?

Always store Zyrtec a room temperature, between 20-25 degrees C. Protect the medication from heat and light. Keep the medication out of the touch of children.

What happens if you miss a dose?

Take the missed dose as soon as you remember it, but not near the time of next dose. If you recall it near the time of next dose, skin the missed dose. Never take a double dose.

What happens if you take an overdose?

You can develop the symptoms like drowsiness, dizziness or dry mouth if you take an overdose. You should always consult with your doctor as soon as possible if notice any symptoms that bothers you.

What are the precautions?

• Do not use this medication if you are allergic to any components of this medicine.
• Always avoid alcohol, transquilizers or sedatives while taking this medication. Because it can increase the risk of drowsiness.
• Avoid driving vehicles or any activity which requires alertness because this medication crosses blood-brain-barrier and cause central nervous system depression.
• Take Zyrtec with caution if you are experiencing any renal or hepatic diseases.
• Avoid this medication in elderly people because they are more prone to catch the side effects.