Consumers should not purchase Norco simply because a website lists multiple strengths or promises fast results. A healthcare professional should determine whether an opioid-containing medication is appropriate and, when prescribed, establish the appropriate strength and dosing instructions. Consumers should not purchase Norco simply because a website lists multiple strengths or promises fast results. A healthcare professional should determine whether an opioid-containing medication is appropriate and, when prescribed, establish the appropriate strength and dosing instructions.