What medications should not be taken with ibuprofen (children's motrin)?

None. You can typically mix most medications with motrin. Tylenol (acetaminophen) should be spaced out from motrin if additional anti-pyretic (fever) medication is needed. Childrens advil is the same medication and should not be given together. antibiotics, or other medication can be given at same time. If you have additional concerns, you can request consult.