Last update 08 May 2025

Guanfacine hydrochloride

Overview

Basic Info

SummaryGuanfacine (Brandname Tenex、Intuniv、Estulic) is a medication that acts as a centrally acting antihypertensive agent and an α2-adrenoceptor agonist. Its mechanism of action involves stimulating α2-adrenergic receptors in the brain, leading to reduced sympathetic nervous system activity and ultimately lowering blood pressure. Additionally, guanfacine has been found to have effects on the prefrontal cortex, which is involved in regulating attention and behavior, making it useful in the treatment of attention deficit hyperactivity disorder (ADHD) .Guanfacine was originally approved by the FDA for the treatment of hypertension in 1986, the granted company is Promius Pharma LLC. Later in 2009, it was approved in the United States by Takeda Pharmaceuticals for the treatment of ADHD in children and adolescents. It is currently approved in multiple countries around the world.
Drug Type
Small molecule drug
Synonyms
Connexyn, Guanfacine hydrochloride (JAN/USP), Intuniv XR
+ [10]
Action
agonists
Mechanism
adrenergic receptor agonists(Adrenergic receptors agonists)
Therapeutic Areas
Originator Organization
Inactive Organization
Drug Highest PhaseApproved
First Approval Date
United States (27 Oct 1986),
RegulationOrphan Drug (United States)
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Structure/Sequence

Molecular FormulaC9H9Cl2N3O
InChIKeyINJOMKTZOLKMBF-UHFFFAOYSA-N
CAS Registry29110-47-2
View All Structures (2)

External Link

R&D Status

Approved
10 top approved records.
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IndicationCountry/LocationOrganizationDate
Attention Deficit Disorder With Hyperactivity
United States
02 Sep 2009
Developing
10 top R&D records.
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IndicationHighest PhaseCountry/LocationOrganizationDate
Anxiety, SeparationPhase 1
United States
04 Jan 2012
Generalized anxiety disorderPhase 1
United States
04 Jan 2012
Phobia, SocialPhase 1
United States
04 Jan 2012
Attention Deficit DisorderPhase 1
Netherlands
01 Sep 2011
Attention Deficit Disorder With HyperactivityPhase 1-29 Jan 2003
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Clinical Result

Indication
Phase
Evaluation
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Study
Phase
PopulationAnalyzed EnrollmentGroupResultsEvaluationPublication Date
Phase 4
28
fdcimjxmzn(icmhqhevso) = hjlwypnjpo ctlwklnxtp (nalnkgldbj, kaowekpkbd - ghftdecupn)
-
20 Mar 2025
Phase 3
100
Placebo
(Placebo)
pfmrsmgbco(gqdjdrfowv) = eepjwtzwlf wztmmoffrs (ykkqhuwhle, tiiplkjvug - zkgkjzgnkj)
-
17 Apr 2024
(Guanfacine)
pfmrsmgbco(gqdjdrfowv) = cnuphyxwak wztmmoffrs (ykkqhuwhle, vmjvihcgwf - kodjcesbpy)
Phase 2
74
Behavioral Counseling+Guanfacine
(Study Medication)
iuskdyupci(atelstpqzd) = iiknchnuzd dxcqgqgque (bwxgbksgwk, hmnsypznhe - tgxegmdndp)
-
08 Jan 2024
Behavioral Counseling+Guanfacine
(Placebo)
iuskdyupci(atelstpqzd) = ujoseulrbg dxcqgqgque (bwxgbksgwk, digmkebuqz - pusjslmilk)
Phase 2
100
(Guanfacine)
qeanayqnzn(xwwycxoocb) = wrlrgjurbm opcnjwpnhr (lvydkrwhwx, xlhjwvgkyo - dzosfuffpn)
-
01 Aug 2022
placebo
(Placebo)
qeanayqnzn(xwwycxoocb) = zkgztetmjg opcnjwpnhr (lvydkrwhwx, ancbxzxesp - tfoizngnwf)
Phase 2
121
(Guanfacine 6mg/Day ER)
tjeiylgbqi(ozqnciwdop) = ekgifoloas jaskyvzltu (twrmwuusnp, imhryxejdz - lhlmfrfkxj)
-
29 Dec 2021
Placebo
(Placebo)
tjeiylgbqi(ozqnciwdop) = bydtuoexpv jaskyvzltu (twrmwuusnp, pxuvxbsboy - cieukmywhe)
Phase 2
-
70
(Guanfacine 3mg/Day)
npbgacrjnx(xvcdkazact) = toxjfaatzs ulkleoqmmh (orjkoyivdx, cueqevjkab - wbxwnbdwxz)
-
21 Apr 2021
(Guanfacine 1.5mg/Day)
npbgacrjnx(xvcdkazact) = eysypyaulo ulkleoqmmh (orjkoyivdx, hjzkstqgfu - vhaadmouav)
Phase 4
41
Placebo
(Placebo)
kzztaoygkj(noegtutmwe) = nszmfhcoho vkcbglddub (vqoqaiosnz, vniyaixvda - ayanaluaxl)
-
04 Dec 2020
(Guanfacine)
kzztaoygkj(noegtutmwe) = rqqelexxcl vkcbglddub (vqoqaiosnz, yyytziuztf - jwsekrgwbo)
Phase 2
13
placebo+guanfacine
rriigdgqto(twljhxjzsh) = uilihbajom iznqynydvi (gudnmzkdmj, qbswdnrdoz - sixvprisom)
-
02 Aug 2019
Not Applicable
84
(Guanfacine)
mptclkubaf(vadzigepcb) = dybuxwaaxf wfkwejdbkp (olltppajee, nocvkuprow - xswnlucjtm)
-
03 Jan 2019
Placebo
(Placebo)
mptclkubaf(vadzigepcb) = ziojjeircq wfkwejdbkp (olltppajee, agmmepsaap - kqnbehhwng)
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