Is it ok to take ambien after taking oxycodone?

It's been several hours since I took the oxycodone 30mg. My doctor prescribed me the Ambien and said if it didn;t work to take 1 1/2 of a 10 mg pill. Is this safe?

: http://alcoholdrugstreatment.info/is-it-ok-to-take-ambien-after-taking-oxycodone