Oral neomycin inhibits the gastrointestinal absorption of penicillin V, oral vitamin B-12, methotrexate and 5-fluorouracil.
<neomycin, mechanism, penicillin V>, <neomycin, mechanism, vitamin B-12>, <neomycin, mechanism, methotrexate>, <neomycin, mechanism, 5-fluorouracil>