He leafed through the pharmaceutical bible, the Physicians' Desk Reference, and selected 300 drugs to test, culling only those for which fast-onset was a necessity, including medicine for migraines (Imitrex), allergies (Claritin) and depression (Prozac).

FORBES: Puff Daddy

They have evaluated the vendors, conducted reference checks via social media and even gone so far as to test the short listed solutions by visiting colleagues who are using the product or downloading free trial versons.

FORBES: Customers Don't Read the Yellow Pages Anymore

But Mr Lee said it would be "difficult to persuade the North regime to give up the nuclear path", and that North Korea's reference to a "high-level" test could indicate it planned to detonate more than one device.

BBC: S Korea leader warns of 'multiple' N Korea nuclear tests