The Brazilian auto racing confederation says stock car driver Alceu Feldmann has been suspended for two years for refusing a doping test.

The confederation confirmed Friday that Feldmann didn't take the mandatory test at a race in May.

The driver had already been under a 30-day suspension for refusing to take the test in the race in the southern state of Rio Grande do Sul.

The stock car series in which Feldmann competes is one of the most important in Brazilian auto racing.

Feldmann, who can still appeal, could not be reached for comment.

He told local media that he didn't take the test because he had been taking medicine that contained a banned substance and didn't have the proper authorization from racing officials.