⚕️ Full Prescribing Information
For complete safety information, warnings, and dosage guidelines:
View FDA Label (PDF) →📋 Overview
Zyrtec is a non-drowsy antihistamine used for allergies. It provides 24-hour relief with less sedation than older antihistamines like Benadryl.
How It Works
Zyrtec blocks histamine H1 receptors, preventing allergy symptoms. It is more selective than first-generation antihistamines, causing less drowsiness.
✓ FDA Approved Uses
- Seasonal allergies
- Year-round allergies
- Chronic hives
- Itching
- Runny nose
- Sneezing
- Watery eyes
⚡ Common Side Effects
Contact your doctor if these persist or worsen:
- Drowsiness
- Dry mouth
- Stomach pain
- Diarrhea
- Tiredness
🚨 Serious Side Effects
Seek immediate medical attention if you experience:
- Fast/irregular heartbeat
- Tremors
- Weakness
- Vision changes
- Difficult urination
⚠️ Do Not Use If
- Allergy to cetirizine or hydroxyzine
- Severe kidney disease
📢 Important Warnings
- May cause drowsiness (less sedating than first-generation)
- Kidney dosing adjustments
- Alcohol increases drowsiness