Hi Foreversittin,
Welcome to the Pain Management Forum. I am very sorry I didn't get to this sooner. I could have answered your question with certainty. This is something that you need to ask a pharmacist or your physician. I would hate to advise you incorrectly.
Methadone has a long half life. I hope you came up with a good solution and your pain was eased. If you have any questions please feel to ask again and hopefully we can be of more assistance.
Take Care, Tuck
do you have something for break through pain you can take in between? Then you don't have to worry about it. Good luck.