Tejada made his debut for Panama in a June 2001 friendly match against Trinidad and Tobago and has, as of 1 August 2015, earned a total of 88 caps, scoring 40 goals and making him Panama's all-time record goalscorer just ahead of Blas Pérez. He represented his country in 24 FIFA World Cup qualification matches and in March 2005, Tejada scored a goal from an overhead kick against Mexico in a World Cup 2006 qualifying match that gave Panama a 1:1 tie against the CONCACAF giants. This goal was voted the best goal of the year by Fox Sports.