Before taking acetaminophen and hydrocodone, // - tell your doctor and pharmacist if you are allergic to acetaminophen, codeine, hydrocodone, sulfite, or any other drugs. ... // - If you become pregnant while taking acetaminophen and hydrocodone, call your doctor. // - if you are having surgery, including dental surgery, tell the doctor or dentist that you are taking acetaminophen and hydrocodone. // - you should know that this drug may make you drowsy and dizzy; do not drive a car or operate heavy machinery until you know how acetaminophen and hydrocodone affects you. // - talk to your doctor about the safe use of alcohol. Alcohol may alter the effectiveness of acetaminophen and hydrocodone.