Started 4 days ago at 20 mg twice a day. Previously I was on the Fentanyl patch 50 mcgs (dropped down from 125 mcgs over the past three months), 15 mg Oxycodone twice a day and Actiq 400 mcgs 3x a day. Just couldn't handle the increase in pain. I've been on opiates for chronic pain for 13 yrs. I'm surprised the methadone is making me so sleepy! And I'm still in a fair amount of pain so am using Actiq 200 mcg 2 - 3 x a day. Will the sleepiness last long?