A string of celebrities including boxer Audley Harrison, actor Richard Wilson, comedienne Jo Brand, TV presenter Anne Diamond, actress Zoe Wanamaker and comic Jasper Carrott backed the campaign, which called for support for Bruno.
Launching Stars Against Stigma last Tuesday, Rethink's chief executive Cliff Prior said: "Rethink and our supporters wish Frank Bruno a speedy and successful recovery. We appeal to everyone, including the media, to give him the support and understanding that everyone with a severe mental illness needs."
The charity offered up some of the supporters, such as Claudia Schiffer's personal chef, for media interviews, but by the end of last week the campaign had not surfaced in any newspaper or consumer magazine title.
A spokeswoman admitted: "We are reviewing the campaign but we don't want to say anything more than that."
Rethink was outraged at the way the tabloid press reported Bruno's admission to a psychiatric unit last month, and developed its national anti-stigma campaign.
The charity wants the government to emulate the commitment of the Scottish Executive, which announced a £24m three-year action plan for improving mental health in Scotland, with a key aim of eliminating stigma.