Who owns claritin brand?

Bayer owns the Claritin brand.

A brief history: Claritin (loratadine) was developed by Schering-Plough, then came under Merck & Co (after Merck acquired Schering-Plough in 2009). In 2018/2019 Bayer acquired Merck’s consumer health business, including Claritin, so Bayer now holds the brand. If you’re in a specific country, there can be regional licensing nuances, so tell me your country if you want the exact market details.