"i have been taking hysingla 20 mg for a month. i was taking norco 5-325 up to 4 a day for chronic back pain post 6 surgeries. i was switched to hysingla due to elevated liver enzymes from tylenol. i have bile duct structure and do what i can to keep liver enzymes lower. i only took what i absolutely had to daily of norco. averaging 2 norco&#039;s a day. since i have started the hysingla i have had a moderately severe headache and nausea everyday. i&#039;m not sure which is worse the liver pain or headache. the nausea i tolerate. i have decided to stop taking the hysingla and go back to the norco. i would rather take as little as possible of medication and still be in pain than have increase in pain and be flat on my back for 6 hours with headache."