When this medication is utilized for a long time, it may well not work also. Discuss with your physician if this medication stops working perfectly.Vi?c s? d?ng ??ng th?i opioid v?i thu?c an th?n nh? benzodiazepin ho?c các lo?i thu?c t??ng t? t?ng nguy c? an th?n, ?c ch? hô h?p, hôn mê và t? vong do tác d?ng ?c ch? th?n kinh trung ??ng gia t?