Recently traveled to europe and bought domperidone otc for nausea. works really well, but came home & realized it is not approved in usa. is it safe?

Yes, but...: This drug has several important drug-drug interactions and is totally contraindicated for use with some other meds. It should not be used in children because it might get into the spinal fluid. Read the information you got with the medication carefully and take it only as recommended. Ginger works well for nausea also, and has much fewer adverse effects.