The N, N′-dimethylformamide solvated crystal of the drug nitrofurantoin has been prepared and analysed by single-crystal X-ray diffraction. The two co-crystallized molecules, in the 1 : 1 stoichiometric ratio, are linked by a medium/strong N–H···O hydrogen bond (N···O is 2.759 (3) Å) and a weaker C–H···O interaction to form isolated supramolecular adducts, that in turn are packed into the lattice framework mainly through C–H···O hydrogen bonds. Two-dimensional fingerprint plots of Hirshfeld surfaces are used to visualize, analyze and compare intermolecular interactions found in the title compound and in similar structures

The purpose of this study is to formulate and evaluate amphiphilic cream with meloxicam indicated for topical relief of pain, particularly because there are currently no available topical dosage forms on the market. Thus, the present research is focused on characterization of the capacity of the amphiphilic base, composed of glycerol monostearate, cetyl alcohol, Tagat^® S2, Myritol^® 318, propylene glycol, and white petrolatum, to be loaded with drug model meloxicam dissolved in propylene glycol. To enhance the solubility and penetration of meloxicam, menthol as a rubefacient was added to the meloxicam solution. The series of three formulations were prepared with variable content of added menthol. Obtained creams were characterized by drug content, pH, spreadability, viscosity, microbial purity, drug release, and stability. Results showed stable cream formulations with good spreadability and viscosity, suitable for topical application.