It means to "dispense sufficient quantity". In other words rather than writing a number of pills or amount of liquid the doctor writes how much and how often to take the medicine and the pharmacist fills the amount that equals the number of doses.
"As Directed"
Quad Strike or Quick Strike. (QS)
"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".
Queer sort
'PO' or 'p.o.' means 'Per Oral'; that is, take the prescribed drug dose by mouth
erhh.. quick silver
There are questions, or there is qs
You will give too small a dose which may mean that the medication is not effective.
Amp. On a drug test stands for Amphetamines, drugs like Adderal, Adderal XR, vyvanse, Ect.
BID means twice a day. bidc would probably be an error.