The title compound, amtolmetin guacil, C(24)H(24)N(2)O(5), is a new gastroprotective non-steroidal anti-inflammatory drug. In the crystal structure, the drug mol-ecule is linked into a one-dimensional structure along the c axis by weak N-H⋯O inter-actions between the amide groups. C-H⋯O and C-H⋯π inter-actions influence the packing.