Dextroamphetamine is an isomer of amphetamine, marketed under the trade name Dexedrine, commonly shortened to Dex among recreational users, presumably also so among people actually using for ADHD
Generally if it's effective orally, it'll be effective intravenously, so I would expect it to work...the issue with dosage is more likely to be in the opposite direction, with significant side effects due to overdosing.
One concern is neurotoxicity after large overdoses, which in most mammalian species may manifest as central nervous system depression,[58] ataxia, coma, and death
I suppose if you overdose hard enough, it would cure COVID in addition to the brain worm
Tarrifs on California