Mosapride Citrate is a 5-HT4 receptor agonist used to stimulate gastrointestinal motility via acetylcholine. Mosapride Citrate facilitates acetylcholine release from the enteric cholinergic neurons.

Naratriptan Hydrochloride is the hydrochloride salt form of naratriptan, a sulfonamide with selective serotonin (5-HT) 1 receptor agonistic activity and anti-migraine property. Naratriptan hydrochloride (GR-85548A hydrochloride) binds selectively and with high affinity to the 5-HT1D and 5-HT1B receptor subtypes. Activation of these 5-HT1D/B receptors located on intracranial blood vessels leads to vasoconstriction and provides relief of migraine headaches. Naratriptan hydrochloride may also exerts its effect by stimulation of 5-HT1D/1B receptors on sensory nerve endings in the trigeminal system thereby decreasing the release of pro-inflammatory neuropeptides.

GR 94800 TFA is a potent, selective antagonist of the NK 2 receptor peptide, demonstrating pK B values of 9.6 for NK 2, 6.4 for NK 1, and 6.0 for NK 3 receptors, respectively [1] [2].

GR 83074 is a potent and selective antagonist of the NK-2 (Neurokinin Receptor), demonstrating a selectivity factor of 340-fold over NK-1, with a pK B value of 8.23. It does not act as an antagonist for NK-3, affirming its specificity [1].