i was told that there was a darvocet pill with the letter M in a box on one side, and 1721 on the other ...fairly large pill and no break line...oh and by the way how long does darvocet stay in your system as far as taking a drug test and what classification would this drug be under ex: opiates?
Is that it? Just an M in a box? No numbers or other markings?
To answer the rest of your question - it depends on the user how long darvocet or any other drug will show up on drug testing, as well as the type of test, and its sensitivity. But generally opiates can clear the system in 1-4 days.
There are two generic Darvocet pills that have an M in a box, [M]. But they both have four numbers on the other side. We need the numbers to tell you what your pill is.
I don't believe Darvocet shows up in a standard drug test
The opiate drug tests look for codeine, morphine, and 6-acetyl-morphine. Heroin breaks down into codeine and morphine. Codeine breaks down into morphine.
Pill ID oblong white pill with M in a box 
Linear Mode
