John, you say ...many inhaled medications are dispensed as micrograms, but pills, capsules and liquids usually are measured in milligrams...

I take levothyroxine for surgically induced hypothyroidism. It comes in pill form. Pill used to be specified in milligrams, then they started using micrograms. I take quite a high dose of 300 micrograms or 0.3 milligrams. More often than not they get it wrong, usually giving me 30 micrograms.      

Check your prescription every time.

Another thing that doesn't give me much confidence in the whole industry is that the pills come packaged in bottles of 100 but the doctors prescribe them monthly, that is in multiples of 30. Don't these guys talk to one another?