Tetraaqua­tetrakis­{μ(2)-[1-(carb­oxylato­meth­yl)cyclo­hex­yl]methanaminium}bis(μ(3)-hydroxido)bis(nitrato-κ(2) O,O′)tetrazinc(II)

As the title gabapentin complex, [Zn(4)(OH)(2)(NO(3))(2)(C(9)H(17)NO(2))(4)(H(2)O)(4)](NO(3))(4) is located about a centre of inversion, the asymmetric unit contains two disordered nitrate ions and half a complex mol­ecule. The two zinc ions have different coordination environments: one is slightly distorted octa­hedral and the other is trigonal–pyramidal. The conformation of the gabapentin mol­ecule is defined by the formation of two intra­molecular O—H⋯O hydrogen bonds. Furthermore, the ammonium H atoms are involved in numerous hydrogen bonds with the disordered nitrate anions.