Local anesthetics increase the inhibitory effect on the central nervous system of other drugs.
Anticoagulants (ardeparin, dalteparin, danaparoid, enoxaparin, heparin, warfarin) increase the risk of bleeding.
Use with monoamine oxidase inhibitors (furazolidone, procarbazine, selegiline), increases the risk of developing hypotension.
Strengthen and prolong the action of myorelaxing drugs.
Cholinesterase inhibitors (antimiasthenic drugs, cyclophosphamide, demecarine, ecothiophate, thiotepa). reduce the metabolism of local anesthetic drugs.
Metabolite procaine (paraaminobenzoic acid) is a sulfonamide antagonist of drugs.