Why didn't whoever prescribed Becky these meds revoke her driver's license? I don't know if the same rules apply in the states as in Europe, but here, if someone is being put on medication that will a hundred percent affect their ability to drive, their license will be revoked until they are off them again.
Of course, Becky should know better herself, and shouldn't have to be told not to drive while obviously under the influence. But it was only a few years ago she was caught drunk driving in a vlog, so it's not surprising.