Citrizine vs Levocetirizine

Pharmacy
1

Both are second-generation antihistamines, widely used to manage:

  1. Allergic rhinitis
  2. Itchy skin and rashes
  3. Red or watery eyes
  4. Insect bites and seasonal allergies

But here’s where it gets interesting

  1. Levocetirizine is the active R-enantiomer of Cetirizine. This makes it more selective and often considered better tolerated in patients with lLiver issues.
  2. Cetirizine, on the other hand, has a slightly stronger antihistamine effect but may be a bit more sedating for some patients.

Adult Dosage . Cetirizine:5-10 mg once daily • Levocetirizine: 5 mg once daily

Pregnancy & Breastfeeding
Both are Category B-> considered safe during pregnancy and compatible with breastfeeding.

Precautions
Cetirizine: use with caution in liver & kidney disease .
Levocetirizine: caution mainly in kidney disease

Quick Brand Reminder:
Cetirizine → Zyrtec .
Levocetirizine → Xyzal

Takeaway:
• If stronger effect is needed → Cetirizine may be preferred.
• If safety in liver disease is a concern → Levocetirizine is the safer pick.

MBH/PS

5 Likes
2

Levocetirizine is more selective and binds more strongly, so smaller doses are effective.

1 Like
3

Informative!

4

True, thanks for sharing.

5

Levocetrizine works best for me :slight_smile:

6

Citrizine is more economical than levocetrizine. But levocetrizine is more potent and require less dose and less sedating.

8

well explained

9

Great comparison! Cetirizine sometimes causes mild sedation.