LAUSANNE, Switzerland — Norwegian equestrian Tony Andre Hansen filed an appeal with the top court of international sports today, trying to overturn his Olympic disqualification after his horse tested positive for a banned pain reliever derived from chili peppers.

Hansen won a bronze medal in team jumping at the Beijing Olympics. He was stripped of his medal and banned for 4½ months in December by the International Equestrian Federation. His horse, Camiro, tested positive for capsaicin.

The Court of Arbitration for Sport usually rules within four months of receiving an appeal.

Hansen was the best performer on a four-rider Norway team that won the bronze under a scoring system where the top three count. Without his scores, his teammates — Morten Djupvik, Stein Endresen, and Geir Gulliksen — drop out of medal contention.

The fourth-place Swiss team of Steve Guerdat, Christina Liebherr, Niklaus Schurtenberger and Pius Schwizer is in line to get the bronze.

The United States won gold, beating Canada in a jumpoff in Hong Kong, where the equestrian events were staged last August.

Hansen was provisionally suspended and did not complete the individual jumping competition. His ban last month was backdated and runs through Jan. 2, 2009.

Hansen was the fourth rider disqualified and suspended in cases involving capsaicin: Germany's Christian Ahlmann was suspended for four months, Brazil's Bernardo Alves for 3½ months and Irish rider Denis Lynch for three months.

Brazil's Rodrigo Pessoa, the individual jumping gold medalist in 2004, was disqualified and banned 4½ months after his horse tested positive for nonivamide, a banned pain-relieving medication. Courtney King of the United States was disqualified and banned for one month because her horse, Mythilus, tested positive for felbinac, a banned anti-inflammatory medication.