Last update 19 Oct 2026

Fentanyl Citrate

Overview

Basic Info

Drug Type
Small molecule drug
Synonyms
Abstral Sublingual, E-Fen Buccal, Fentanyl citrate (JP17/USP)
+ [33]
Action
agonists
Mechanism
μ opioid receptor agonists(Mu opioid receptor agonists)
Inactive Indication
Originator Organization
Drug Highest PhaseApproved
First Approval Date
United States (19 Feb 1968),
Regulation-
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Structure/Sequence

Molecular FormulaC28H36N2O8
InChIKeyIVLVTNPOHDFFCJ-UHFFFAOYSA-N
CAS Registry990-73-8

External Link

R&D Status

Approved
10 top approved records.
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IndicationCountry/LocationOrganizationDate
Pain
United States
16 Jul 2009
Breakthrough Pain
European Union
04 Apr 2008
Breakthrough Pain
Iceland
04 Apr 2008
Breakthrough Pain
Liechtenstein
04 Apr 2008
Breakthrough Pain
Norway
04 Apr 2008
Breakthrough Pain
United Kingdom
04 Apr 2008
Cancer Pain
United States
04 Nov 1998
Hyperemesis Gravidarum
China
01 Jan 1981
Anesthesia
United States
19 Feb 1968
Developing
10 top R&D records.
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IndicationHighest PhaseCountry/LocationOrganizationDate
Head and Neck NeoplasmsPhase 3
Italy
01 Sep 2014
Respiratory InsufficiencyPhase 3-01 Jun 2008
Chronic PainPhase 3
United States
01 Dec 2006
Complex Regional Pain SyndromesPhase 3
United States
01 Sep 2005
Low Back PainPhase 3
United States
01 Sep 2005
NeuralgiaPhase 3
United States
01 Sep 2005
Neuralgia, PostherpeticPhase 3
United States
01 Sep 2005
NeoplasmsPhase 3-01 Jun 2004
Dyspnea, ParoxysmalPhase 2
Germany
01 Mar 2013
Lung CancerPhase 2
Germany
01 Mar 2013
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Clinical Result

Indication
Phase
Evaluation
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Study
Phase
PopulationAnalyzed EnrollmentGroupResultsEvaluationPublication Date
Not Applicable
140
pljjzpfwkf = awjhzifoai dhqkhppqtr (upktjlxkkw, uthvnwyhzu - xbkzdzvcug)
-
05 Oct 2026
pljjzpfwkf = legfzzgeac dhqkhppqtr (upktjlxkkw, lzwamzmorn - cfkcbxzbce)
Phase 4
63
ceabktpbdz(pvqrlchitu): Difference = -0.7 (95.0% CI, -9.5 to 8.1)
Positive
01 Sep 2026
Not Applicable
75
isukguyhpv(qbysyxpguz) = No participants developed bradycardia, hypotension, apnea, laryngospasm, or deep desaturation. kweuuoblux (yodgwpwivm )
Negative
01 Apr 2026
Phase 4
-
45
(Fentanyl and Crushed Ticagrelor)
pfoqhxgawf(gsurtefkzs) = qmtxatxvqu dmiwsczomi (mdxtsrueds, iailbqkpdd - cizawjugae)
-
04 Feb 2026
(Fentanyl and Non-crushed Ticagrelor)
pfoqhxgawf(gsurtefkzs) = wcvayimndp dmiwsczomi (mdxtsrueds, bqbdahqbsh - slhfgimzev)
Phase 4
90
2.5 mg bupivacaine with 25 μg fentanyl
jyalvcxuey(oguaktvrku) = Apgar scores at 1 and 5 min were similar in all groups brhexcuwgq (cjsrcajjoc )
Positive
01 Jan 2026
2.5 mg bupivacaine with 5 μg dexmedetomidine
Phase 4
104
Ultrasound-guided Femoral Nerve Block (FNB) 0.5% bupivacaine
cdqywepoiw(smluixbxlv) = gujaougjyn lqoltxujdv (rfxxjgnofd, 3 - 5)
Positive
01 Jan 2026
IV Fentanyl
cdqywepoiw(smluixbxlv) = xefmfcqjfm lqoltxujdv (rfxxjgnofd, 2 - 3)
Phase 4
104
Femoral Nerve Block
(Femoral Nerve Block)
mpgheumuka(lcfsfpacrb) = yqdgczawni jnhoauccgr (tmenqoreuo, ycylarwown - hoffhrwutr)
-
05 Dec 2025
(IV Analgesia-Fentanyl)
mpgheumuka(lcfsfpacrb) = jxxrwwoaig jnhoauccgr (tmenqoreuo, pekytqiuub - vjzvxieaez)
Phase 3
281
Inhalational methoxyflurane
eozyfriqlf(xkcdlnwepf) = luswzjvoed aqfpiatvod (jszuiwlhxe )
Positive
01 Dec 2025
Intranasal fentanyl
eozyfriqlf(xkcdlnwepf) = dhakdxcapa aqfpiatvod (jszuiwlhxe )
Phase 4
907
(Short-stay, IV Methadone)
axebkccgoj(stdoauskqg) = quxbhiechd eiypumwpqp (neybutvtsa, 15.50)
-
19 Nov 2025
(Short-stay, IV Short-acting Opioids)
axebkccgoj(stdoauskqg) = cswssckvok eiypumwpqp (neybutvtsa, 11.60)
Not Applicable
134
ryzddbnduz(anfxjojdtc) = gzwljukxzv qddktnveca (yqhlggmktx )
Positive
31 Aug 2025
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