Paul Flowers' solicitor says his client has been "hounded" by the press since his alleged drug possession was reported in the media.
Speaking outside Stainbeck Police Station in Leeds, Andrew Hollas said: "I think it's been self-evident that he has been hounded for six months by certain elements of the press and they have included many allegations within their papers that have been completely without foundation."
He told reporters that the former Co-op Bank chairman would make a "full statement" following his appearance at Leeds Magistrates' Court on May 7.
The Crown Prosecution Service says it has "carefully considered a file of evidence" gathered by police following newspaper allegations against former Co-op Bank chairman Paul Flowers.
Clare Stevens, from CPS Yorkshire and Humberside’s Complex Casework Unit, said she believed "there is sufficient evidence and it is in the public interest to charge Paul Flowers with possession of Class A and Class C drugs relating to an incident on 9 November 2013".
Mr Flowers has been charged with possession of cocaine, methamphetamine and ketamine, the CPS said.
Disgraced former Co-op Bank chief Paul Flowers has been charged with drug offences, police have said.
West Yorkshire Police said Mr Flowers, 63, has been charged with two offences of possession of a Class A drug and one offence of possession of a Class C drug.
Mr Flowers has been bailed and will appear before Leeds Magistrates Court on 7 May.