per os


per os

 [per os] (L.) by mouth.

per os (PO),

(per os), By or through the mouth, denoting a method of delivering medication. [L.]

per os

Latin instruction, by mouth.
 
Use of the Latin instructions for therapeutics is waning; usage of plain English is preferred from all perspectives, including informed consent and liability reduction.

per os

By mouth, orally

per os

(PO) (pĕr os) By or through the mouth, denoting a method of medication or feeding.
See: peroral[L.]

per os

(PO) (pĕr os) By or through the mouth, denoting method of delivering medication. [L.]