Provided are phenylalkylamines, such as 2, 5 -disubstituted and 2,4,5-trisubstituted phenylalkylamines. In some embodiments, the phenylalkylamines are asymmetrically substituted. In some embodiments, such compounds modulate the activity of monoamine receptors and/or monoamine transporters. Also provided are methods for the preparation of phenylalkylamines and pharmaceutical compositions thereof. Methods of using the phenylalkylamines, alone or in combination with other therapeutic agents, are provided. In some embodiments, phenylalkylamines are used to treat CNS disorders, such as mental health conditions and neurodegenerative disorders, or are used for the improvement of mental health or functioning.