Serotonin Receptor Quick Reference organizes the functions of serotonin receptors with the specific receptors. In addition, each receptor page displays its agonists and antagonists. From addiction, anxiety, and mood to respiration, pupil dilation, and sleep this app displays which 5-HT subtype receptors are responsible for affecting each function. This simple program can help to make sense of the effects of medications and particular groupings of human functions that are affected by this neurotransmitter.