I took a watson 3546 about seven hours ago, can I take a vicoden 750 now? Will have a reaction to the 750 vicoden

Unlikely. Watson 3546 is aspirin, butalbital, caffeine and Codeine 325 mg / 50 mg / 40 mg / 30 mg. Was this prescribed to you? Was the vicoden? There is no reason you cannot take a vicoden now is it was prescribed to you.