i have been taking oxycodone for the last year everyday. I started taking methadone 4 days ago. Tapering down 5 mgs a day from 20 to 10 yesterday. I dont want to take it anymore so I took 10 mgs of valium to help w/ds. Could it be dangerous if I was to take 10 mg again this evening since the halflife of the methadoe will be around 5 to 10 mgs still?