Yes. Thank you. There have been plural studies (https://www.science.org/doi/10.1126/sciadv.add4165, https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3489818/, and many more, these are literally just the first google results), showing that perscription stimulants have a negligible, or even negative, effect on productivity in neurotypical populations. Their reputation as a "smart drug" has been greatly exaggerated.