Forest have already brought in the maximum number of loan players that are allowed in a matchday squad, which has led O'Driscoll to believe that there is no point adding to his roster in the near future.
O'Driscoll said: "I have five loan players, I don't want six. I can't use them. It's pointless unless I lose one or two.
"When you can only use five players in the squad, one will have to miss out if you sign another one."
Nottingham Forest are currently in 12th place in the Championship table.