  Approximate analytical solutions of the Dirac equation are obtained for some
diatomic molecular potentials plus a tensor interaction with spin and
pseudospin symmetries with any angular momentum. We find the energy eigenvalue
equations in the closed form and the spinor wave functions by using an
algebraic method. We also perform numerical calculations for the
P\"oschl-Teller potential to show the effect of the tensor interaction. Our
results are consistent with ones obtained before.
