Hydrocodone and Cyclobenzaprine - Safe?

[ThusSpokeZarathustra]

SWiM has ingested a 50 mg dose of hydrocodone (five 10/660s). He also has four 10 mg cyclobenzaprine (Flexeril, a commonly prescribed muscle relaxant). Swim was wondering if it would be safe to take all 40mgs of cyclobenzaprine?
He knows they potentiate opiates, but is not taking them solely to do so.



Also, this is his first time taking cyclobenzaprine, and was wondering if anyone could inquire on the recreational effects other than relaxation/drowsiness?

Thanks in advance.