Thanks for the additional information.
The pill might be NOVO-PERIDOL made by Novopharm, Canada. NOVO-PERIDOL contains 5 mg haloperidol, a powerful anti-psychotic drug.
Novopharm's website has a picture of this pill. Compare your tablet with the photo at novopharm.com/product_images_e.asp?id=263
More info on haloperidol:
http://haloperidol.drugs.com/
I'm not a pharmacist or a medical doctor. This message is not medical advice nor is it an offer to provide medical advice. All drug identifications should be validated by a licensed MD or pharmacist.