Hi,

you can use vector autoregression in this case. However, you can use Vector error correction model only if there is cointegration between the two variables. If not, you can simply use VAR model or unrestricted VAR. You need to use stationary variables in a VAR or VEC model. If you can provide more information about the nature of variables both DV and IVs, I can provide more info about it.

Good Luck

Thushara