No interactions have been described at usual doses. It is possible that<unk>  can increase the potency of sedative drugs like benzodiazepines, some anticonvulsants and antidepressants, and alcohol. Likewise, some consumer informations warn patients from taking the drug in combination with or up to two weeks after monoamine oxidase inhibitors, which are known to cause potentially fatal reactions in combination with the (chemically only distantly related) antitussive dextromethorphan.
Pentoxyverine
Denaverine
Protamine
Phenoperidine
Drotaverine
Fresh frozen plasma
Aminocaproic acid
Protamine sulfate