This invention relates to, in part, compositions and methods that are useful for, inter alia, the treatment of various diseases, including those linked to binding at a serotonin receptor. The compositions include chiral tetrahydronaphthalen-2-amine derivatives. Accordingly, the present invention provides for compositions and methods that agonize or antagonize one or more serotonin receptors and which find Use in the treatment of various neuropsychiatric diseases or disorders including, without limitation, autism spectrum disorder (ASD) or associated symptoms.