My Son Missed His Saturday Methadone Apt. Where He Gets

My son missed his Saturday Methadone apt. where he gets his 120 dose for Sat and Sun. He is panikced and sweating and scared because he will not get his dose until Mon. am--He has been going down 1 -2 mg a week with the intention of getting off completely.

He has asked if I can give him 2 of my .5 Klonopin a day to help him get to Monday apt.
Is this safe?