The Bayonne winger had been suspended for three months by the FFR after it was revealed he had missed three out-of-competition tests.
He made his return to club action in the Basque derby defeat to Biarritz and has since scored in games against Wasps and Agen.
But the French anti-doping agency could hand him a suspension of up to two years at tomorrow's hearing, which would end his hopes of winning a place in new France boss Philippe Saint-André's first Six Nations squad.
Huget had told French newspaper the Midi Olympique: "I hadn't worried about it when I was told I had received two warnings and I risked a suspension.
"I didn't take it seriously enough. I was naïve thinking that it would sort itself out when I explained everything to the Federation.
"I think there should be more communication with young players explaining the system but I have to accept a large part of responsibility for what happened."