ADHD drugs
The following study is sometimes cited as evidence in favor of methylphenidate treatment
https://sci-hub.se/https://link.springer.com/article/10.2165/11589380-000000000-00000
They referenced this study:
https://depts.washington.edu/psychres/wordpress/wp-content/uploads/2017/11/100-Papers-in-Clinical-Psychiatry-Child-and-Adolescent-Psychiatry-3-year-follow-up-of-the-NIMH-MTA-Study..pdf
Other long term studies also show stimulants dont work in the case of ADHD
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4815037/
Stimulants can still give a percieved benefit to people using them including individuals not diagnosed with ADHD
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3813924/
Studies on how stimulant drugs affect academic performance for people with ADHD symptoms are mixed and overall inconclusive:
https://onlinelibrary.wiley.com/doi/10.1111/jcpt.13486?af=R
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6264851/
https://link.springer.com/article/10.1007/s00787-018-1106-3
The following study did find that the group who took their medication as prescribed were less likely to abuse other substances but this was not a randomized controlled trial and can thus be discarded
https://www.sciencedaily.com/releases/2017/07/170712201249.htm
The study only looked at the first 2 years since starting on stimulant medication which is too short to draw any long term conclusion.
The Cochrane review found:
The quality of the evidence and hence the certainty or reliability of the evidence for the comparative studies is very low. The reliability of the evidence for the non-comparative studies is low due to weaknesses in study design. Accordingly, it is not possible to accurately estimate the risks of adverse events in children and adolescents prescribed methylphenidate.
Methyphenidiate might be associated with a number of serious adverse events. Methylphenidate produces a large number of other non-serious harmful effects in children and adolescents with ADHD. We suggest that clinicians and parents are alert to the importance of monitoring adverse events in a systematic, meticulous manner. If methylphenidate is to continue to have a place in ADHD treatment in the future, we need to identify subgroups of patients in whom the benefits of methylphenidate outweigh the harms. Just as we need to be able to identify who is likely to benefit from treatment, we also need to be able to identify those who are most at risk of experiencing adverse events. In order to do this, we need to undertake large-scale, high-quality RCTs along with other studies aimed at identifying those who respond and those who do not respond to treatment.
The following study is sometimes cited as evidence in favor of methylphenidate treatment
https://sci-hub.se/https://link.springer.com/article/10.2165/11589380-000000000-00000
However, the earlier advantage of having had continuous intake of medication for 14 months was no longer apparent at the 36-month follow-up.
https://depts.washington.edu/psychres/wordpress/wp-content/uploads/2017/11/100-Papers-in-Clinical-Psychiatry-Child-and-Adolescent-Psychiatry-3-year-follow-up-of-the-NIMH-MTA-Study..pdf
Other long term studies also show stimulants dont work in the case of ADHD
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4815037/
Stimulants can still give a percieved benefit to people using them including individuals not diagnosed with ADHD
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3813924/
Studies on how stimulant drugs affect academic performance for people with ADHD symptoms are mixed and overall inconclusive:
https://onlinelibrary.wiley.com/doi/10.1111/jcpt.13486?af=R
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6264851/
https://link.springer.com/article/10.1007/s00787-018-1106-3
The following study did find that the group who took their medication as prescribed were less likely to abuse other substances but this was not a randomized controlled trial and can thus be discarded
https://www.sciencedaily.com/releases/2017/07/170712201249.htm
The study only looked at the first 2 years since starting on stimulant medication which is too short to draw any long term conclusion.
The Cochrane review found:
The quality of the evidence and hence the certainty or reliability of the evidence for the comparative studies is very low. The reliability of the evidence for the non-comparative studies is low due to weaknesses in study design. Accordingly, it is not possible to accurately estimate the risks of adverse events in children and adolescents prescribed methylphenidate.
Methyphenidiate might be associated with a number of serious adverse events. Methylphenidate produces a large number of other non-serious harmful effects in children and adolescents with ADHD. We suggest that clinicians and parents are alert to the importance of monitoring adverse events in a systematic, meticulous manner. If methylphenidate is to continue to have a place in ADHD treatment in the future, we need to identify subgroups of patients in whom the benefits of methylphenidate outweigh the harms. Just as we need to be able to identify who is likely to benefit from treatment, we also need to be able to identify those who are most at risk of experiencing adverse events. In order to do this, we need to undertake large-scale, high-quality RCTs along with other studies aimed at identifying those who respond and those who do not respond to treatment.