Godolphin trainer Mahmood Al Zarooni will appear before a disciplinary panel of the British Horseracing Authority on Thursday.
Al Zarooni has been charged after tests found traces of anabolic steroids in 11 of his horses.
The British Horseracing Authority (BHA) said in a statement on Wednesday that the trainer faces multiple counts related to prohibited substances, medical records and conduct prejudicial to horse racing.
The 11 horses, who together have won more than $2m in prize money and include unbeaten Certify, were based at Al Zarooni's yard in Newmarket, England.
The BHA added that between 600-700 tests were carried out in 2012 as part of the 'testing in training' sampling programme.
The trainer - who has made a big impact since becoming one of Godolphin's trainers winning last year's Dubai World Cup and the oldest classic the English St Leger - said on Monday he had made a "catastrophic mistake".
Godolphin was founded in 1992 and has recorded over 2,000 wins - including 200 Group One victories - in 14 countries.
On Tuesday, leading British bookmakers said they have announced that they will refund hundreds of thousands of dollars of bets placed on some of the Godolphin horses which tested positive for banned steroids.
Ladbrokes, William Hill and Paddy Power have all returned money to punters owing to "exceptional circumstances".