In cases where an interacting drug needs to be replaced with an alternative, providers should exercise their clinical judgement to erection the most appropriate alternative medication to use. Note: DLV is not included in this table. Please refer to the FDA product label for information regarding drug interactions between DLV and other concomitant drugs. The information in the brief version is excerpted directly from the full-text guidelines. The brief version is a compilation of the tables and boxed recommendations. Guidelines search Guidelines search. Open Close. Table 21b. If coadministration is necessary, monitor for therapeutic effectiveness of alpha antagonist. May need to increase dose to tamsulosin 0. No dose adjustment treatment for Erection Problem for rifabutin.