We present the results of an effective approach to rescattering in B decays to two pseudoscalar mesons, where all inelastic Zweig-rule-satisfying SU(3)-symmetric final-state interactions are taken into account. It is shown how such rescattering corrections lead to a simple redefinition of the amplitudes, permitting the use of a simple diagram-based description, in which, however, weak phases may enter in a modified way. An estimate of how these modifications might affect the extracted value of unitarity triangle angle \gamma is given. It is pointed out that substantial shifts in the value of \gamma cannot be excluded on the basis of the low experimental bound on the B⁰_d \to K⁺K^- branching ratio alone.

PACS numbers: 13.25.Hw, 11.30.Hv, 11.80.Gw, 12.15.Hh