What s the difference between Norco and Vicodin. My doctor prescribes Hydrocodone-Acetaminophen 7.5-325 for arthritis pain in my lower back. The prescription bottle says Norco. But, I ve heard Vicodin is stronger. However, when my back hurts now I need something stronger tHan ehat he prescribes. What would be a good suggestion for my pain management doctor?