Brand-name versions can also be offered. ER oral capsules are bought as ConZip, as well as a liquid solution is bought as Qdolo. The brand Ultram is not any longer created.The effects of concomitant use or discontinuation of cytochrome P450 3A4 inducers, 3A4 inhibitors, or 2D6 inhibitors on amounts of tramadol and M1 from tramadol hydrochloride tab