Claritin (loratadine is excreted in clinically unimportant amounts.
Anderson, PO. Drug use during breast-feeding. Clin Pharm.
1991:10: p 604
The article cited is:
Hilbert J, Radwanski E, Affrime MB et al. Excretion of loratadine in
human breast milk. J Clin Pharmacol. 1988:28:234-9