Zyrtec Syrup (Cetirizine) Medication

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Generic Alternative - Zyrtec Syrup (Cetirizine)

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Drug Description


Zyrtec Syrup is prescribed for the temporary alleviation of symptoms associated with hay fever or other upper respiratory allergies, which include: 

  • Runny nose 
  • Sneezing 
  • Itchy, watery eyes 
  • Nose or throat itching 

As an antihistamine, Zyrtec Syrup works by inhibiting the production of histamine, a natural substance released by the body in response to allergies. 

Uses and Dosage 

Before taking Zyrtec Syrup and with every prescription refill, thoroughly review the accompanying medication guide and patient information leaflet. Consult with your healthcare provider or pharmacist for any questions or concerns. 

The dosage of Zyrtec Syrup may vary per individual based on age, medical conditions, and response to the treatment. 

Typically, this medication is taken once daily as prescribed by the doctor. 

For accurate dosage, use the provided measuring device when administering Zyrtec Syrup rather than a household spoon. 

To optimize effectiveness, take this medication exactly as directed. Do not exceed the recommended dosage or frequency of administration without consulting your doctor. 

Inform your doctor if your allergy symptoms persist without improvement, if hives do not respond to treatment within 3 days, or if hives persist for over 6 weeks. 

Seek immediate medical assistance if your condition deteriorates or you suspect a severe medical issue, such as a potentially life-threatening allergic reaction (anaphylaxis). 

Side Effects 

Listed below are the potential adverse effects of Zyrtec Syrup. Inform your doctor promptly if any of these symptoms continue or deteriorate. 

Common Side Effects 

  • Drowsiness 
  • Tiredness 
  • Dry mouth 
  • Stomach pain (especially in children) 

Serious Side Effects 

  • Difficulty urinating 
  • Weakness 

Tell your doctor immediately if you experience any of the severe side effects listed above. 

Allergic Reactions 

In rare cases, Zyrtec Syrup may trigger a serious allergic response. Immediate medical aid must be sought if you observe any indications of an allergic reaction, such as: 

  • Rash 
  • Itching/swelling, particularly of the face, tongue, or throat 
  • Severe dizziness 
  • Difficulty breathing 

This list does not encompass all potential side effects of Zyrtec Syrup. Notify your doctor in case of any unmentioned side effects. 


Before starting treatment with Zyrtec Syrup, inform your doctor if you have any known allergies, particularly to cetirizine, hydroxyzine, or levocetirizine. 

Ask your pharmacist for more details about Zyrtec Syrup, as it could include inactive ingredients that have the potential to trigger allergic reactions or other adverse effects. 

To ensure Zyrtec Syrup is safe for you, disclose to your doctor your medical background, especially if you have a history of: 

  • Difficulty urinating, potentially due to an enlarged prostate 
  • Kidney disease 
  • Liver disease 

To minimize the potential of drug interaction with Zyrtec Syrup, inform all your healthcare providers of any current or recently started or stopped medications, including prescription and over-the-counter drugs, vitamins, and herbal supplements. 

Inspect the labels of your medicines, encompassing allergy and cough-and-cold items, for potentially drowsy ingredients. Consult your pharmacist to ascertain their safe utilization. 

Furthermore, notify your doctor or pharmacist if you are using other substances that induce drowsiness, including: 

  • Opioid pain or cough medications (e.g., codeine, hydrocodone) 
  • Alcohol 
  • Marijuana (cannabis) 
  • Sleep or anxiety medications (e.g., alprazolam, lorazepam, zolpidem) 
  • Muscle relaxants (e.g., carisoprodol, cyclobenzaprine) 
  • Other antihistamines (e.g., chlorpheniramine, diphenhydramine) 

Refrain from using other topical antihistamines (e.g., diphenhydramine cream, ointment, spray) while taking Zyrtec Syrup to avoid potential side effect intensification. 

Cetirizine closely resembles hydroxyzine and levocetirizine. Avoid concurrent use of these medications with Zyrtec Syrup. 

Zyrtec Syrup is not effective in preventing hives or treating severe allergic reactions. Always carry your prescribed epinephrine injector for emergencies. Do not substitute this medication for epinephrine. 

Zyrtec Syrup can disrupt specific lab tests, like allergy skin testing, leading to inaccurate results. Inform lab personnel and all healthcare providers about your use of this medication. 

Exercise caution when operating a vehicle or engaging in activities that demand attentiveness, as Zyrtec Syrup can hinder cognitive function and responsiveness. 

During pregnancy, Zyrtec Syrup should only be taken if deemed necessary. Discuss with your healthcare provider the potential risks and benefits of this medication for you and your baby. 

Breastfeeding mothers should seek medical advice before taking Zyrtec Syrup, as its active ingredient, cetirizine, can be transmitted through breast milk. 

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Quality Prescription Drugs has provided information from third parties intended to increase awareness and does not contain all the information about Zyrtec Syrup (Cetirizine). Talk to your doctor or a qualified medical practitioner for medical attention, advice, or if you have any concerns about Zyrtec Syrup (Cetirizine).