What kind of pill is white and round with m on one side and c on the top half and 15 on the bottom half of the other side

Not Medical Advice: Round pill imprint C 15 M is Clonazepam is used in the treatment of anxiety; bipolar disorder; panic disorder; insomnia; periodic limb MORE?

Sunday, February 05 2012
Source: http://www.drugs.com/imprints/c-15-m-6599.html