Ahia
Franck Montagny fears his motorsport career could be over after admitting to taking a derivative of cocaine.
Frenchman Montagny, who drove in seven Formula One races for the Super Aguri team in 2006, tested positive during an ePrix race in Malaysia in November.
The 36-year-old said he was "ashamed" after the test and admitted that his career was probably over - he has already been suspended until sanctions are handed down by the FIA.
"Auto sport is perhaps over for me," the Andretti driver told L'Equipe.
"After the event I saw the guy who tests signalling me. There, in my head, I knew immediately. I knew it was over.
"I made a mistake, I'm guilty."
The inaugural FIA Formula E championship - involving single-seater, electrically powered cars - got underway last September in Beijing.
Montagny withdrew from the most recent race in Uruguay last month, citing illness, with Matthew Brabham taking his seat in the Andretti team.