How long does methadone block other opiates?

I’ve been I’m a high dose of methadone for a while now (180mg a day) and I’ve come to realize detox will take years so I’m gonna switch back to oxy because detoxing off that takes 3 days. I’m just wondering if you all know when the opioid blocking affects of methadone wear off because I haven’t taken a dose in 40 hours and cannot feel the oxygen I have taken. Also I don’t want any speeches about how you think you have a better idea I don’t care for that all I want to know is when the opioid blocking affects of methadone wear off thank you