The Dope Syndrome

The two biggest impacts from that order are:
1. marijuana, more specifically, THC, can be legally studied in scientific experiments.

2. Businesses that sell marijuana can legally deduct the costs of selling marijuana against their profits. This should lower the price in dispensaries in states that have allowed the sales.

The possibilities for epilepsy treatment is very promising.
It also opens the door for IRS enforcement of what is essentially a cash only business. In Colorado pot stores couldn't bank any income because of fed banking regs, which led to massive hoards of cash and to an extent money laundering. On the surface they can pitch this as opening research, but it's about collecting money they couldn't access before.