No one will know better than your prescribing DR what dose is right for you. It depends how much medicine you were taking before hand and for how long.
When you have a narcotic tolerance your body is able to withstand a higher dose than those not used to opioids.
If you are concered about your dose speak with your Doctor.
Good Luck
Standard dosing with methadone indicates a 30-40 mg dose to start with....for opiate addicts some take the dose to over 120mg for maintanance............those are daily doses..not 3x a day.....