Brand-name variations may also be readily available. ER oral capsules are sold as ConZip, along with a liquid solution is marketed as Qdolo. The brand Ultram isn't any longer produced.The effects of concomitant use or discontinuation of cytochrome P450 3A4 inducers, 3A4 inhibitors, or 2D6 inhibitors on levels of tramadol and M1 from tramadol hydroc