Lately I've been nauseous the next day after using opiates at night. Why is this and what can I do to make it go away once I wake up and I'm feeling green?
Promethazine can also cause drowsiness, so maybe best to avoid it. The 2nd/3rd gen antihistamines, like loratadine and cetirizine, don't have the side effects like sleepiness, so might be worth getting them instead.
Chances are you are over dosing your self a little..maybe tone it down a bit. If you are getting sick th enext morning or that night, and it's clearly not a sickness from lack k of dope, you just did too much.