Does a low dose stimulate like Vyvanse balance out the antidepressant?

I have a friend who is on antidepressant and reported that by adding a 10mg Vyvanse, it significantly improve the mood, energy and focus.

Most of my young and middle aged tech friends are on vyvanse or addie, at much higher dose though.

My hypothesis is that combining duloxetine (SNRIs) with low dose Vyvanse offers a more balanced approach for modulating neurotransmitters. SNRIs increase the levels of serotonin and norepinephrine via recycling, while the dopamine from Vyvanse can round out the remodelling by SNRIs, potentially providing a more beneficial neurotransmitter profile.

Has anyone tried?

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Not surprised that taking an amphetamine would increase your mood. Not sure though what you mean by balancing?
What did your friend’s doctor say?

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SNRIs increase the levels of serotonin and norepinephrine, low dose Vyvanse increase dopamine so the relative ratio of 3 is more balanced? Just a layman’s speculation.

The doctor prescribed the med.

Low dose stimulants can benefit mood, too high a dose and anxiety appears

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Not to mention addiction.

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I have found that a high dose of Adderall–30 mg or so–will interfere with, and impede, my ability to run. I think that Adderall either raises body temperature or makes the body more susceptible to increases in temperature.

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Compare the associated outcomes of people who are indicated for it but don’t use it. All-cause mortality skyrockets and other important endpoints.

Compared to non-medication use, episodes of ADHD medication use, overall, were associated with reduced all-cause mortality (adjusted hazard ratio, aHR 0.61, 95% CI 0.48–0.76) and unintentional injury leading to ED (0.75, 0.74–0.77) or hospitalisation (0.71, 0.68–0.75).
ADHD medications use and risk of mortality and unintentional injuries: a population-based cohort study - PMC

Relevant clip:
https://kick.com/destiny?clip=clip_01HDPH3DZF65EZ4018TX00JVM4

That is the key. People for whom it is indicated.

I’m curious what the mechanism is here. My first thought is that stimulants help with positive/health promoting habit formation, as well as, perhaps, living a more purposeful life (due to increases in motivation and goal seeking). The second result about unintentional injuries makes me wonder though. Why do people with untreated ADHD injure themselves more often? Is that the bulk of the reduction in all cause mortality?

Looking more closely at the study, they only looked at people <=24 years of age. Not sure how relevant this is to long term use or conclusions about lifelong all cause mortality

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This tweet suggests it’s ~13 years reduced life expectancy (or between 8-25 years reduced life expectancy):
https://xcancel.com/RyanMarino/status/1786202010519318596

People with untreated ADHD injure and kill themselves more often partially due to a wide range adrenaline-seeking behaviour and impulsive actions. Sometimes I’m amazed I lived long enough to be diagnosed and treated in later life.

My caffeine intake is a habit but I don’t know that there is anything positive about it. Amphetamine addiction is more harmful than beneficial.