Hydrocodone is used for severe pain. You get this medicine with the doctor’s prescription. According to your doctor’s prescription, you should take it one tablet every 4-6 hours intervals and the maximum number of tablets is 6 tablets you can take in a day, not more than. This medication makes you sleepy, dizzy so do not drive while taking this medicine. You can feel the effects within 4-6 hours. You need plenty of water to decrease constipation.