Thank you. I will try to call them. But it says

" If a U.S. resident wants to bring in a controlled substance but does not have a prescription for the substance issued by a U.S.-licensed practitioner who is registered with, and authorized by, the Drug Enforcement Administration (DEA) to prescribe the medication, the individual may not import more than 50 dosage units of the medication into the United States"

So it sounds like 20 units is ok. Thanks!