  We analyze final state strong interaction effects in $B -> D \rho$ and $B ->
D^{*}\pi$ decays using the Regge model. We find that, due to the smallness of
the contributions from the non-leading Regge trajectories ($\rho$, $f$, $\pi$
etc.), final state interaction phases are small if the Pomeron coupling to the
charm quark is suppressed in comparison to lighter quarks. Our conclusion is
that for $B$ decays into states containing charm, final state interaction
effects should play a minor role.
