Klonopin good for crash?

[college]

swim has a few 2mg k-pins left over from an old Rx. Swim wants to know if they are good to help induce sleep after the effects of E (MDxA) wear off. Is this a dangerous combination? Swim had a very hard crash last time swim rolled - doesnt want to repeat the scenerio, the actual depression and irratibilty wore off after a few hours but swim was left with powerful amphetamine stimulation that wasnt pleasant in such a drained state and blocked any sleep for the whole day. Does it help? Im sure someoene knows. Thanks!