Is there such a thing as minoxidil overdose?

[ohdearno]

Got my first shipment of #500 minoxidil yesterday. No labels on the bottles, no instructions, just bottles and two ways of using it.

1. Spray. Like deodorant.
2. Pipette. Science lab stuff.

I intend to apply it at temples, hairline and crown. Been using the spray so far but dont have any idea how much I'm using. Can you overdose with minoxidil?