Butabarbital, calcium/magnesium/potassium/sodium oxybates. Both improves effects of the opposite by pharmacodynamic synergism. Contraindicated. Coadministration with Alcoholic beverages or sedative hypnotics are contraindicated as a consequence of additive CNS melancholy. butabarbital will lessen the level or outcome of conivaptan by impacting hepatic/intestinal enzyme CYP3A4 metaboli... https://johnnyt108tpn3.ourabilitywiki.com/user