Blackmon will miss the rest of the 2013 season after falling foul of the league's rules for the second time of the year after initially being suspended for the opening five games of the campaign.
"I want to sincerely apologise to Mr Khan, my teammates, my coaches and to the Jaguars fans for not utilizing the resources that I was provided to overcome my challenges," Blackmon said in a statement released to ProFootballTalk.com.
"I am determined to overcome the issues that have resulted in this situation, and I truly appreciate the support that the Jaguars and my agent have shown me.
"I will address these matters with the type of intensity I usually direct toward my on-field play so that I can be ready to be a productive member of the team and community next season.
"Again, I am truly sorry to Mr Khan, my teammates and coaches and to the Jaguars fans for the impact of my situation on the team as well as to my family and friends and those that have been there for me during these challenging times. Nobody is more disappointed with all of this than me."
The Jaguars are 0-8 in their season.