@stoneMason-- No, don't do it cold turkey. Quitting cold turkey is a sure way to experience ill effects. You may need to get professional help with withdrawal. Sometimes it's exceedingly difficult to withdraw without a doctor's help.
I've never used methadone but I've been on addictive antidepressants that cause the same withdrawal symptoms. The way that I was able to withdraw without getting terribly ill was to take it slow. I reduced the dose very, very slowly over a month.
It's not easy to cut up a tiny tablet into very small doses. But you can do it by dissolving the smallest piece in water and taking only a part of that. So for example, if you dissolve 5mg in a cup of water and drink half, you will get 2.5mg of the drug. Use this method to reduce the dose in smaller amounts than before. Every time you reduce the dose, give yourself time and don't reduce unless you feel absolutely fine without negative symptoms. And do seek help from a doctor if it's not going well.