Can methadone affect a urine test for heroin?

When used as prescribed, methadone can safely be taken continuously over a period of weeks, months and even years without harsh side effects. According to the U.S. read more

Methadone is an opioid (narcotic) drug that is used to relieve pain, and to help decrease and manage the withdrawal symptoms of other opioids, such as heroin. Methadone works through binding to the same receptors in the brain, through which other opioids affect, including μ (mu) and k (kappa) receptors. read more

YES a pregnancy test can show negative if you are on methadone. I've done some research on this because I am also on methadone, and think I am pregnant. I am not late on my period yet, but should be starting in the next 2 days. I just haven't felt right and have experience frequent headaches and nausea so I took a test and it came back negative. read more