why was fentanyl originally created

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
why was fentanyl originally created	1.81	0.7	3483	86	35
why	1.58	1	2985	16	3
was	0.25	0.6	6168	63	3
fentanyl	0.18	0.6	8003	22	8
originally	0.74	0.5	5524	29	10
created	0.69	0.7	9258	58	7

Keyword	CPC	PCC	Volume	Score
why was fentanyl originally created	1.52	0.5	6506	48
when was fentanyl first introduced	0.97	0.4	8871	15
when was fentanyl first discovered	1.8	0.5	38	33
what was fentanyl first used for	0.64	0.6	9880	49
where is fentanyl created	0.03	0.6	8239	23
fentanyl definition and history	0.12	0.2	6600	49
fentanyl history of synthesis	0.29	0.7	4809	97
fentanyl history of discovery	0.03	0.2	2201	69
fentanyl definition and origin	0.28	0.9	5033	8
when did fentanyl become widespread	1.43	0.5	7307	11
fentanyl history of prescription	1.57	0.3	1299	82
fentanyl history of effects	0.95	0.9	3030	1
how is fentanyl derived	1.76	0.9	3624	64