What does levo mean in levocetirizine?

What does “levo” mean in levocetirizine?

In levocetirizine, “levo” refers to the left-handed (L-) form of the active ingredient. Levocetirizine is the L-enantiomer of cetirizine, meaning it’s one specific mirror-image version of the molecule rather than a mix of versions.

How is levocetirizine different from cetirizine?

Cetirizine contains both mirror-image forms (commonly described as the racemic mixture). Levocetirizine contains only the L-enantiomer, which is the “levo” part of the name.

Why do drug names use terms like “levo”?

Drug naming like “levo” is used to distinguish which enantiomer (mirror-image form) a medication contains, which can affect how a drug behaves in the body (such as strength and dosing characteristics).