Garcia Marquez's son said his family decided to take him to the hospital as a precaution on Monday and health officials said he was taking antibiotics for lung and urinary tract infections.
His son, Gonzalo Garcia Barcha, said the author of "One Hundred Years of Solitude" could be discharged on Tuesday.
"He is well taken care of and everything is evolving very well," his son, Garcia Barcha, told reporters outside the National Medical Sciences and Nutrition Institute.
"He is in a good mood, very happy. He eats very well and knows everybody," she told AFP on condition of anonymity.
A health ministry spokesman said there was no new information regarding his condition.
The ministry said yesterday that Garcia Marquez "has responded to treatment and once he finishes taking antibiotics, his discharge will be examined.