My hubby has narcolepsy, and he does drive, and long drives are a problem, however he has also served many times on a jury. Depends on the degree they have this, and any meds. But they can and do drive, just a little side note.
My BIL has it too & wears something that looks like an oxygen mask over his face every night to bed..It's very loud & took my SIL months to get used to the noise..It doesn't matter in this case cos I believe it was said the jurors have their own room (?) & this juror didn't mention using one of these anyway..If he had it bad enough I think he would?
BIL's never slept better & doesn't feel tired at all during the day=no longer just nods off.