Zyrtec (Cetirizine)


Zyrtec relieves symptoms of hay fever, cold symptoms and seasonal allergy symptoms such itchy, watering eyes, runny nose and sneezing.


Zyrtec is a brand name for the drug cetirizine, which is an antihistamine medication. It is commonly used for the treatment of various allergic conditions. Here are some of the primary uses:

  • Allergic rhinitis: Zyrtec is used to relieve symptoms associated with seasonal allergies (hay fever) and perennial allergic rhinitis (year-round allergies). These symptoms may include sneezing, runny or itchy nose, itchy or watery eyes, and itching of the throat or nose.
  • Allergic conjunctivitis: Medicine can help alleviate eye symptoms related to allergies, such as redness, itching, and tearing.
  • Urticaria (hives): Medicament is used to treat the itching and swelling associated with hives, a skin condition characterized by red, raised, and itchy welts.
  • Pruritus (itching): Zyrtec may be prescribed to relieve itching caused by various allergic reactions or other conditions.
  • Eczema: In some cases, Zyrtec might be used to help control itching associated with atopic dermatitis, a type of eczema.
  • Drug works by blocking the action of histamine, a substance produced by the body in response to an allergic reaction. By inhibiting histamine's effects, drug can reduce or prevent the typical allergy symptoms.
Zyrtec Pills


Dosage recommendations for medications can vary based on factors such as age, weight, medical condition, and individual response to the drug.

For Zyrtec, the typical dosages are as follows:

Adults and children 6 years and older:

  • The recommended starting dose for adults and children over 12 years of age is 10 mg (one tablet) once daily.

Children 6 to 11 years:

  • The recommended starting dose for children between 6 and 11 years of age is 5 mg (half a tablet) or 10 mg (one tablet) once daily, depending on the child's response and the severity of the symptoms.


An overdose of Zyrtec can occur if you take more than the recommended dosage, or if you accidentally take multiple doses close together. It's important to seek immediate medical attention if you suspect an overdose. Overdosing on Zyrtec can lead to serious medical complications and may require emergency medical treatment.

Symptoms of overdose may include:

  • Severe drowsiness or sedation
  • Agitation or restlessness
  • Rapid or irregular heartbeat
  • Dilated pupils
  • Flushing (reddening of the skin)
  • Dry mouth
  • Nausea and vomiting
  • Difficulty urinating
  • Confusion or hallucinations
  • Seizures (rare but possible in severe cases)

If you or someone you know may have taken an overdose of Zyrtec or are experiencing any of these symptoms, immediately contact your local emergency services or go to the nearest emergency room.


When using Zyrtec or any other medication, it is essential to take certain precautions to ensure safe and effective use. Here are some precautions to consider:

  • Alcohol and sedatives: Zyrtec may cause drowsiness in some individuals. Avoid alcohol and other central nervous system depressants while taking this medication, as it may enhance the sedative effects.
  • Operating machinery or driving: If you experience drowsiness or impaired alertness while taking Zyrtec, avoid activities that require mental alertness, such as operating heavy machinery or driving a vehicle.
  • Age considerations: Zyrtec dosing may differ based on age. Follow the recommended dosages for adults and children.
  • Adverse reactions: Be aware of potential side effects and adverse reactions. Common side effects of Zyrtec may include headache, dry mouth, dizziness, and fatigue.
  • Long-term use: Long-term use may require monitoring and periodic evaluation to ensure its continued effectiveness and safety.

Side Effects

Zyrtec is generally well-tolerated by most people, but like any medication, it can cause side effects in some individuals. Common side effects may include:

  • Headache
  • Dry mouth
  • Drowsiness or fatigue
  • Dizziness
  • Sore throat
  • Abdominal pain
  • Nausea
  • Diarrhea
  • Allergic reactions (rare but possible)

Most of these side effects are mild and often go away on their own.

Additionally, while rare, some individuals may experience more serious side effects. If you notice any of the following, seek immediate medical attention:

  • Signs of an allergic reaction, such as hives, difficulty breathing, or swelling of the face, lips, tongue, or throat.
  • Rapid or irregular heartbeat.
  • Severe dizziness or fainting.
  • Unusual bleeding or bruising.
  • Mental/mood changes, such as agitation, confusion, or hallucinations.
  • Severe stomach pain or persistent nausea and vomiting.
  • Difficulty urinating or changes in the amount of urine.


Proper storage of medications, including Zyrtec, is important to maintain their effectiveness and safety. Here are some general guidelines for storing:

  • Store in a cool, dry place: Keep pills in a location away from direct sunlight, heat, and moisture. A cool and dry environment helps prevent the breakdown of the medication.
  • Keep out of reach of children and pets: Store Zyrtec in a secure place, out of the reach of children and pets, to avoid accidental ingestion.
  • Follow the packaging instructions: Always follow the storage instructions provided on the packaging or label of the medication.
  • Original container: Store tablets in its original container with the lid tightly closed. The original container is designed to protect the medication from light, air, and other potential contaminants.
  • Avoid bathroom storage: While it may be convenient, the bathroom is generally not the best place to store medications due to the moisture and temperature fluctuations that can occur in that environment.
  • Check expiration date: Do not use Zyrtec past its expiration date. Discard any expired or unused medication properly.

Additionally, if you need to dispose of any unused or expired Zyrtec, do so properly following local guidelines or any drug take-back programs available in your area. Never flush medication down the toilet unless explicitly instructed to do so, as it can be harmful to the environment.

By following proper storage guidelines, you can ensure that your pharmaceutical product remains effective and safe for use throughout its shelf life.