Brief Answer:
On the contrary, it actually decreases appetite...

Detailed Answer:

Hello,

Well, to answer your question, Methadone actually decreases appetite.

However, it can also depend due to which purpose it's being taken for, at how many doses and for how long (whether as a part of pain management or opioid detox or any other reasons).

Appetite may increase due to one's own body metabolism, but it's important to know if any other medications are going on simultaneously or are there any particular ongoing treatment for any other medical conditions.

Let me know if I can assist you further.
Take Care
Regards

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