Any drug interactions while taking stelara (ustekinumab)? okay to take claritin for allergies?

Claritin (loratadine) ok: the major interactions with Stelara (ustekinumab) (mAb against IL-12 and IL-23) include decreased vaccine efficacy and concern for immune suppression when added to other suppressive drugs. Use of Claritin is ok.

Drug interactions: You can use a drug interaction checker whenever you have questions about drug-drug interactions or drug - food interactions. Here is 1 option (Drugs.Com): https://www.drugs.com/drug_interactions.php Your pharmacist is also a good source of info.