“…18 Nicotinic acid contains a pyridine ring and carboxyl group that are preferentially involved in supramolecular synthon formation. In view of its wider significance, it has been used as an API (active pharmaceutical ingredient) to be cocrystallized with a variety of coformers, such as 4-aminobenzoic acid-nicotinic acid (2/1) co-crystal, 19 hesperetin-nicotinic acid co-crystal, 20 gallic acid-nicotinic acid, 20 3,5-dinoitrobenzoic acid-nicotinic acid molecular complex, 21 nicotinium p-hydroxybenzoic acid monohydrate, 22 dipicolinic acid-nicotinic acid zwitterionic co-crystal, 23 modafinil-nicotinic acid co-crystal, 24 and pyrogallol-nicotinic acid co-crystal. 25,26 Gallic acid (3,4,5-trihydroxybenzoic acid) monohydrate, a naturally occurring dietary triphenol, 27 is an ideal co-former in co-crystallization.…”