Difference between Fentanyl Citrate and Fentanyl HCL

Project Will

Bluelighter
Joined
Aug 29, 2009
Messages
520
Location
Nashville
Hello,

I've had pharmaceutical grade fentanyl hcl in the form of a powder and would usually mix 50mg in a 100ml nasal spray bottle for insufflation. This is no longer available, but I am curious about fentanyl citrate. Could anyone shed some light on the difference in strength between the hcl and citrate form of fentanyl - perhaps a dose per dose conversion if possible?

Thanks!
 

sekio

Moderator: N&PD
Staff member
Joined
Sep 14, 2009
Messages
19,450
Location
streets of simcity
fentanyl mw 336 - fb ratio 1.0
fentanyl hcl mw 372.5 - fb ratio 0.90
fentanyl citrate mw 528 fb ratio 0.636

fentanyl citrate is ~70% as strong as fentanyl hydrochloride, milligram for milligram
 
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