Phenindamine Tartrate is an antihistamine and anticholinergic drug closely related to cyproheptadine. It is used to treat symptoms of the commoncold and allergies, such as sneezing, itching, rashes, and hives.
Guaifenesin-d3 is intended for use as an internal standard for the quantification of guaifenesin by GC- or LC-MS. Guaifenesin is an expectorant. It inhibits production of mucin 5AC (MUC5AC), reduces mucus viscosity and elasticity, and increases the mucociliary transport rate of endogenous particles in primary human tracheobronchial epithelial cells in a concentration-dependent manner. Guaifenesin increases phenol red secretion, a marker of expectorant activity, in rats.3 Formulations containing guaifenesin have been used as expectorants in the treatment of the commoncold and chronic bronchitis.