What is a white round pill with the imprints 155 on one side and a D on the other?

Nearest match is a round, white pill 155 & the Actavis logo on the other which is like a half moon (D).It is known as Buprenorphine HCl & naloxone HCl 8mg/2mg.

Wednesday, June 26 2013
Source: http://www.drugs.com/pill-logo-identification.html