The pill might be 5 mg
Focalin (dexmethylphenidate hydrochloride), a drug used for treating ADHD.
You can find the description and a picture at:
http://www.drugs.com/PDR/Focalin_Tablets.html
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.