  We compute the CP-violating (CPV) scalar axion coupling to nucleons in the
framework of baryon chiral perturbation theory and we apply the results to the
case of left-right symmetry. The correlated constraints with other CPV
observables show that the predicted axion nucleon coupling is within the reach
of present axion-mediated force experiments for $M_{W_R}$ up to $1000$ TeV.
