"As Directed"
"Every 6 hours, PRN"
Methadone you mean? Yes it does show up in a drug test.
Is it "prd" or "PRN"? PRN means "as needed".
'PO' or 'p.o.' means 'Per Oral'; that is, take the prescribed drug dose by mouth
metoclopromide antiemetic drug
You will give too small a dose which may mean that the medication is not effective.
BID means twice a day. bidc would probably be an error.
Every morning
enough of a drug, if you take a lethal dose, it will kill you.
When you are givin to high a dose of medicine or a drug it can be Toxic or deadly.
The dose of a drug needed to produce a desired result.