But he said he opposed setting blanket fixed-term bans on players.
“There must be consistency in the FIFA family when taking decisions (on sanctions in doping cases), but not simply to say anyone found guilty gets a two-year ban. That is too easy,” Blatter said.
“You cannot judge all cases the same way…You have to take into account environment, age and so on. As in criminal law the judge has a variety of sanctions,” he added.
His comments come just days after Juventus midfielder Edgar Davids and Parma defender Stefano Torrisi were banned for five months following positive tests for the steroid nandrolone.
Dutch international Davids has launched a lawsuit against Blatter in the Netherlands over comments the FIFA chief reportedly made in a television interview.
Blatter said he still planned to meet Davids.
“There will be a…get together to explain the situation like two sportsmen can do,” Blatter said.
He was critical of the way some players had reacted after being banned following positive tests for banned substances.
“It is a little bit strange that when players are found guilty they will attack the organisations that are fighting against doping and are not attacking those responsible for giving them the substances,” he said.
Blatter said he was “absolutely” pleased with preparations for next year’s finals in Japan and Korea. He suggested there could be a surprise winner since the event is taking place for the first time in Asia.
“There are no problems in the organising of this competition but we are playing in 20 stadia, 10 in Korea and 10 in Japan, so you can imagine what that means logistically…Practically there will be the expenses for two World Cups,” Blatter said.
“It will be the first World Cup where teams from South America and Europe have no home games. They are both playing on neutral grounds and perhaps this can create a new world champion,” he added.