If you're still not seeing any relief you may need to talk to your doc again about this. the nexium alone does not help my nausea, i also have been prescribed liquid carafate which also comes in a pill form.
I found it helped me in about 2 weeks, but it probably depends on what you are being treated for. I have mild gastritis, mild reflux and a small hiatal hernia. I was told to take a double dose, 40mg a day for 2 months and then to cut back to 20mg a day. The Doctor said it takes about 2 months for the inflamation to heal.