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What is Cetrizin?
Cetrizin is a generic antihistamine containing 10mg Cetirizine HCl, a second-generation H1-blocker that treats allergic rhinitis, chronic urticaria, and itchy skin from atopic dermatitis with less drowsiness than older antihistamines. It's bioequivalence-tested to match the original branded Cetirizine molecule. Take one tablet daily, with or without food. Each box contains 500 tablets (50 strips of 10).
🛒 Box of 500 tablets (50 strips x 10) · Authentic · Fast 24-hr shipping. Intimo Life — Consult a doctor or pharmacist before use
Product Description
Cetrizin is a bioequivalent generic formulation of Cetirizine HCl 10 mg — a second-generation H1-antihistamine manufactured by T.O. Pharma or approved Thai GMP pharmaceutical manufacturers. It contains the identical active molecule as Zyrtec but at a more accessible price point, making it suitable for patients requiring long-term Cetirizine therapy.
Cetrizin has passed Thai FDA Bioequivalence testing, confirming equivalent absorption and therapeutic effect compared to the original brand
Indicated for Allergic Rhinitis (seasonal and perennial), Chronic Idiopathic Urticaria, and pruritus associated with Atopic Dermatitis
Children under 6 years: 10 mg tablet not recommended; use age-appropriate syrup formulation
Cetrizin vs other antihistamines
Comparing Cetrizin (Cetirizine) with other antihistamines:
Cetrizin vs Chlorpheniramine (CPM): Cetrizin causes significantly less drowsiness and lasts 24 hours vs 4-6 hours — much better for daily activities
Cetrizin vs Loratadine: Both are 2nd-gen with comparable sedation profiles; Cetirizine often has a slightly faster onset
Cetrizin vs Fexofenadine (Telfast): Fexofenadine has the lowest sedation of the class — preferred for those particularly sensitive to drowsiness
Cetrizin vs Zyrtec: Identical active ingredient; Zyrtec is the original brand at a higher price; Cetrizin is a bioequivalent generic
Can you take Cetrizin with other medications?
Drug interactions to consider when using Cetrizin (Cetirizine):
CNS Depressants: Sedatives, benzodiazepines, opioids — may enhance drowsiness; use with caution
Alcohol: Significantly potentiates sedation — avoid concurrent use
Anticholinergic drugs: Additive anticholinergic side effects (dry mouth, urinary retention)
High-dose Theophylline: May slightly reduce Cetirizine clearance; not clinically significant at standard doses
Cetirizine undergoes minimal CYP450 metabolism, resulting in fewer drug-drug interactions compared to some other antihistamines.
How fast does Cetrizin work?
Onset and duration of Cetrizin (Cetirizine) action:
Onset: Within 1 hour of administration (peak plasma level at approximately 1-2 hours)
Duration: 24 hours — once-daily dosing maintains therapeutic plasma levels throughout the day
Acute allergy symptoms: Runny nose, sneezing, and itching typically improve within 1-2 hours
Chronic urticaria: May require several days to weeks of consistent use before optimal benefit is achieved
Where to buy Cetrizin?
How to buy Cetrizin?
Order online at Intimo Life with nationwide delivery across Thailand in 1-3 business days. Discreet packaging — no product name on the outer box for your privacy.
⚠️ Disclaimer
The information on this page is for general informational purposes only and is not intended to replace professional medical advice, diagnosis, or treatment from a qualified doctor or pharmacist. If you have any questions about your symptoms or medication, always consult a doctor or pharmacist first.
Both contain identical Cetirizine HCl 10 mg. Zyrtec is the original brand (UCB Pharma); Cetrizin is a bioequivalent generic at a lower price point — suitable for long-term allergy management.
Cetrizin causes significantly less drowsiness than Chlorpheniramine due to lower CNS penetration. Some individuals may experience mild sedation initially — test personal response before driving.
Generally yes — Cetrizin (Cetirizine) causes significantly less sedation than 1st-generation antihistamines. However, test your personal response initially, as individual sensitivity to sedation varies.
Take Cetrizin at any consistent time — with or without food. Some prefer evening dosing to minimize any daytime drowsiness. Once-daily dosing provides 24-hour allergy protection regardless of timing.
Cetrizin has few drug interactions overall. Use caution with CNS depressants, sedatives, and alcohol as they may enhance drowsiness. Always inform your pharmacist of all current medications.
Children 6-11 years: half tablet (5 mg) once or twice daily based on weight. For children under 6 years, an age-appropriate cetirizine syrup formulation is preferred over tablets.
Acute allergy symptoms (runny nose, sneezing, itching) typically improve within 1-2 hours. For chronic urticaria, consistent use over 3-7 or more days may be needed before optimal benefit is seen.
Both are 2nd-gen antihistamines with low sedation profiles. Cetrizin (Cetirizine) generally has a slightly faster onset; some individuals find Loratadine causes even less drowsiness. Overall antiallergic efficacy is comparable.
Yes. Cetrizin can be taken daily without developing tachyphylaxis (tolerance), making it suitable for chronic allergic rhinitis and urticaria management. Periodic reassessment of ongoing need is still recommended.
Cetrizin offers significant cost savings versus Zyrtec while delivering bioequivalent therapeutic outcomes. It represents excellent value for patients requiring long-term antihistamine therapy for chronic allergic conditions.
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