Tony McCoy was stood down at Taunton on Friday after sustaining a suspected rib injury.
McCoy suffered a final-fence fall aboard Laudatory in the Steve Logan Memorial County Contractors Handicap Hurdle.
The 16-times champion jockey gave up his final ride of the day, Hopeful Start, in the totetrifecta Handicap Chase.
Clerk of the course Michael Trickey said: "I believe he has got sore ribs.
"That is as much as we can ascertain at the moment.
"He hasn't gone to hospital."
McCoy is due to be in action at Warwick on Saturday, where he has four rides.
was, however, later taken on a stretcher to hospital by ambulance.
An on-duty medical officer at Taunton said: He's fallen off his horse and appears to have been kicked.
"He's now been taken to Musgrove Park Hospital."
It later emerged McCoy had suffered suspected cracked ribs.
Trickey added: "He had some morphine and they've had a further look and taken him to hospital.
"He has suspected cracked ribs."