http://forums.bicycling.com/topic/54635607121300594
"It's a typo.
I'd imagine the directions should read Inhale 2 puffs by mouth every 4 hours as needed. That's abbreviated I2P PO Q4H PRN
Inhale 2 puffs by mouth every 4 hours rectally would be I2P PO Q4H PR
That's a pretty funny one."
"It's a typo.
I'd imagine the directions should read Inhale 2 puffs by mouth every 4 hours as needed. That's abbreviated I2P PO Q4H PRN
Inhale 2 puffs by mouth every 4 hours rectally would be I2P PO Q4H PR
That's a pretty funny one."