Identification, synthesis, isolation and characterization of formulation related impurity of Gabapentin.

An unknown impurity was observed during stability studies of Gabapentin capsules. This impurity has been identified, synthesized, isolated and characterized using modern analytical tool. The novel impurity was confirmed as adduct of Gabapentin and lactose; an excipient used in formulation.

Identification, synthesis, isolation and characterization of new impurity in metoprolol tartrate tablets.

A new unknown impurity was observed in accelerated stability studies of Metoprolol tartrate tablets. This impurity has been identified, synthesized and characterized through different spectral studies and confirmed as an adduct of lactose and Metoprolol formed by Maillard reaction.