Using the Mountain Pass Theorem, we establish the existence of periodic solution for Euler-Lagrange equation. Lagrangian consists of kinetic part (an anisotropic G-function), potential part K − W and a forcing term. We consider two situations: G satisfying ∆2∩∇2 in infinity and globally. We give conditions on the growth of the potential near zero for both situations.2010 Mathematics Subject Classification. 46E30 , 46E40.