In 2011 Vidanage was banned for four years for violating anti-doping rules. Vidanage was a student of Polonnaruwa Royal Central College. A urine sample provided by Vidanage in April 2011 at the 2011 Asian Weightlifting Championships in China was found to have metabolites of two methylhexanamine, which is banned by the World Anti-Doping Agency.
Vidanage admitted taking the drug "unknowingly".
The International Weightlifting Federation subsequently banned him for four years.