Hydrocodone, like codeine, is an effective anti-tussive ... or cough suppressant. It doesn't work due to a "coating" action, it works on the cough reflex center of the brain, after it's been absorbed from the stomach into the blood stream. Taken at bedtime, it should help you get some sleep (finally!) due to the sedation, plus cough relief. Especially if you have one of those horrid dry tickly coughs that seem to get worse as soon as you lie down.

Hope you're feeling better soon

Doreen