Inspired by this paper, in section "Is there a change in the preventive influence of ADHD medication on accident/injury risk over the lifespan in ADHD patients?"

Snippet:

ADHD medication thereby reduced the risk of transport accidents by about 58 % in both young and middle-aged males but did not reduce the risk for females in any age group (Chang et al., 2014).

Surprisingly, we still don't have good evidence about this. There's some disagreement about how long stimulant medication works, or if your body just gets used to it. Ideally we'd get a long-term RTC, or similarly-strong evidence.

Whenever such strong evidence is available, will it be found that long-term stimulant medication of ADHD lowers the accident hazard ratio by at least 1.2x, in men, even after 2 years of continued treatment?

Resolves whenever strong causal evidence is finally available, to my satisfaction. By the way I haven't fully read the papers, in fact, you could say the subject matter pertains to me.