Round light yellow (could look white, but is light yellow per the manufacturer) tablet imprinted G on one side with 2444 on the other side is Budeprion SR containing 150 mg extended-release
bupropion HCl. It's an antidepressant equivalent to
Wellbutrin SR.
G 2444 is also marketed under the name of Buproban for smoking cessation (generic
Zyban).
More info:
http://bupropion.drugs.com/
I'm not a pharmacist or a medical doctor. This message is not medical advice, nor is at an offer to provide medical advice. All drug identifications should be validated by a licensed MD or pharmacist.