Are these for headache treatment? I need to know if I could take it if I'm already taking two Norco 10/325mg tablets? ## No, Norco contains Hydrocodone and Acetaminophen, so you shouldn't add more Acetaminophen, without your doctor's approval, as taking too much can create a risk of liver damage, or liver failure. Has the Allzital been prescribed for you? It would be best to stick with the medication your doctor has instructed you to take. Are you on any other medications?