| titleOfInvention |
The combination of (a) dextromethorphan or a pharmaceutically acceptable salt thereof, precursors or derivatives, e.g. dextromethorphan hydrobromide and in particular dextromethorphan hydrobromide monohydrate; and (b) quinidine or a pharmaceutically acceptable salt thereof, precursors or derivatives, e.g. quinidine sulfate and in particular quinidine sulfate dihydrate |