A Connecticut prosecutor says test results show a chimpanzee that mauled a woman in the United States had the anti-anxiety drug Xanax in its system.

Stamford State's Attorney David Cohen said on Wednesday that it was unclear if the drug played a role in the attack.

Travis in his playpen in 2003. Credit:AP/Stamford Advocate

The 90-kilogram chimp, named Travis, attacked Stamford resident Charla Nash on February 16.

The victim lost her hands, nose, lips and eyelids in the attack. Doctors at Ohio's Cleveland Clinic say she is blind and faces two years of surgical procedures.