I need to know what a small round white pill with an M in a box on one side and the other side has 05 above the score markand a 52 under it. Can you tell me what this pill is

I am not going to identify this for you but will give you a place where you can do your own searching. I would not want to accept any responsibility for giving you information when all you say is that you found a pill. No other information. You should call your local emergency room or a pharmacy and ask what this pill is and the proper disposal.

Pill Identifier - Drugs.com (http://www.drugs.com/pill_identification.html)
Common Imprints | Pharmer.org -- Pill Identification Resources (http://www.pharmer.org/imprints)

Is this it?
M 05 52 Pill Identification (http://www.drugs.com/imprints/m-05-52-5113.html)

Does it look like this? Where did you find it?http://gsm.about.com/photos/photo_us_h/065/oxyc552t.jpg