Hello, yes, my doctor recently changed my lortab script to norco. The norco seems to make me drowsy as where the lortab did not. I only take them periodically for migraines. But with the lortab, I could take and still work. I took my first norco last week while at work and had to leave. There was no discussion at my appt about changing the scripts. I was just wondering why it was changed and why does one make me tired and not the other. Thank you