I also would recommend melatonin.. I've never used the GNC brand but from what i've read (and used) the smaller the dosage the better. But it depends on the person, as with anything.. Some sleep studies showed that someone who took 2mg had more success than someone who took 20 mg.. I just use the 3mg tablets. I've taken a few of those once or twice and felt real groggy the next morning, but one 3mg tablet works really well.

If that doesn't work.. ambien will