The four-times Tour de France winner's sample showed double the allowed limit of Salbutamol but Froome has denied any wrongdoing and is free to race because he is not suspended.
Froome, who has not ridden in the Giro since 2010 and has never won it, will be aiming to become the first rider to complete the Giro/Tour double for 20 years.
Italian Marco Pantani was the last man to achieve the feat in 1998.
The three-week 3546.2km Giro begins in Jerusalem on May 4. The Tour de France starts two months later.
(Reporting by Shrivathsa Sridhar in Bengaluru, editing by Ed Osmond)
