Leeds failed to capitalise on a half-time advantage against the Addicks and Warnock believes that he needs to add to his squad to sustain a promotion challenge.
Warnock said: "We were lethargic - plodders. It was a game we should have won so we are disappointed but we were holding on for a point at the end when Paddy Kenny had to make an excellent save.
"Maybe it was the changes we had to make to the team, but if you get a point and play badly that's something.
"There was no zip about us, but I am talking to the chairman tonight about trying to bring in some loan players because we need more options."
Leeds host Birmingham City on Saturday as they look to move into the top five of the Championship table.