No, that's heroin. Cocaine is often cut with levamisole - nasty stuff.
They are cutting coke with it now too, and weed.
http://www.businessinsider.com/fentanyl-cut-cocaine-causing-overdoses-2017-6
https://www.usatoday.com/story/news/2017/05/27/how-much-fentanyl-can-kill-you/345726001/
https://www.vice.com/en_us/article/7xpvzz/fentanyl-laced-coke-is-killing-new-yorkers-vgtrn
http://wkrn.com/2017/08/18/district-attorney-marijuana-laced-with-fentanyl-is-in-tennessee/
https://www.metro.us/news/the-big-stories/fentanyl-laced-pot-causes-panic-massachusetts-ohio