are their any foods that effect methadone from working?

just wondering if their are any food interactions with methadone, i.e. foods that either block or increase the analgesic effects of methadone(oral form 10mg tablets) in particular. when taken for pain relief.
just wondering if their are any foods that interact with methadone(oral form 10mg. tabs) only one i have found is grapefruit. More like.. does taking it before or after a meal effect anything. what types of meals that may increase or decrease the analgesic effects of methadone when taken for pain relief.

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