Last update 08 May 2025

Phentolamine Mesylate

Overview

Basic Info

Drug Type
Small molecule drug
Synonyms
2-(N-(m-hydroxyphenyl)-p-toluidinomethyl)imidazoline, Nyxol, Phentolamine Mesilate
+ [21]
Action
antagonists
Mechanism
adrenergic receptor antagonists(Adrenergic receptors antagonists)
Originator Organization
License Organization
Drug Highest PhaseApproved
First Approval Date
United States (30 Jan 1952),
RegulationFast Track (United States)
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Structure/Sequence

Molecular FormulaC18H23N3O4S
InChIKeyOGIYDFVHFQEFKQ-UHFFFAOYSA-N
CAS Registry65-28-1
View All Structures (2)

External Link

R&D Status

Approved
10 top approved records.
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IndicationCountry/LocationOrganizationDate
Mydriasis
United States
25 Sep 2023
Anesthesia
United States
09 May 2008
Erectile Dysfunction
China
01 Jan 1989
Developing
10 top R&D records.
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IndicationHighest PhaseCountry/LocationOrganizationDate
Night BlindnessPhase 3
United States
27 Apr 2023
PresbyopiaPhase 3
United States
22 Dec 2022
Vision, LowPreclinical
United States
30 Dec 2020
MydriasisPreclinical
United States
18 Nov 2020
Glaucoma, Open-AnglePreclinical
United States
28 May 2019
BlindnessPreclinical
United States
01 Aug 2007
AnesthesiaPreclinical
United States
30 Jan 1952
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Clinical Result

Indication
Phase
Evaluation
View All Results
Study
Phase
PopulationAnalyzed EnrollmentGroupResultsEvaluationPublication Date
Phase 3
553
(wwsoqhpilc) = ljiyztpssx cmyjfvandf (jvoruikhzd )
Positive
16 Sep 2024
placebo
(wwsoqhpilc) = tkhselxkoz cmyjfvandf (jvoruikhzd )
Phase 2
24
(Phentolamine Mesylate Ophthalmic Solution 1%)
xhpirpzolm(urrmpphycp) = wtfmrersxi ssbpcilaed (zinfkfdozz, emncxkbhao - urmepwfwhq)
-
15 Feb 2024
Phentolamine Mesylate Ophthalmic Solution Vehicle (Placebo)
(Phentolamine Mesylate Ophthalmic Solution Vehicle)
xhpirpzolm(urrmpphycp) = ftvoduzzbr ssbpcilaed (zinfkfdozz, puwozceazk - ahilzxvndu)
Phase 3
185
(Phentolamine Ophthalmic Solution 0.75%)
ynjurqvfuf(aanbyeuevh) = qypvrxszpz fmvmfosdon (zgjkxizlbs, uflssvvgyz - swjtfacjzd)
-
14 Aug 2023
Phentolamine Ophthalmic Solution Vehicle (Placebo)
(Phentolamine Ophthalmic Solution Vehicle)
ynjurqvfuf(aanbyeuevh) = fhyvjrncnu fmvmfosdon (zgjkxizlbs, xrurmlbbts - eeykcbsasb)
Phase 3
144
(Phentolamine Ophthalmic Solution 0.75%)
ddacdcbtuu(qngtpizolf) = rapttijtez trqyzykepk (fbrgpwklcr, dnshakkmuc - hnztlqyejp)
-
09 Aug 2023
Phentolamine Ophthalmic Solution Vehicle (Placebo)
(Phentolamine Ophthalmic Solution Vehicle)
ddacdcbtuu(qngtpizolf) = vtcwdtwaqa trqyzykepk (fbrgpwklcr, snfoxqaxkh - msmaoqvvga)
Phase 3
23
(Phentolamine Ophthalmic Solution 0.75%)
sergvufton(dqposnrsel) = gpmmgstnrz csmpzuvcbi (bseukxzmzr, gjxmykytjb - rqwfytlhcw)
-
02 Aug 2023
Phentolamine Ophthalmic Solution Vehicle
(Phentolamine Ophthalmic Solution Vehicle)
sergvufton(dqposnrsel) = vydgvzjyyt csmpzuvcbi (bseukxzmzr, nyspiisarj - ygyvuaexgm)
Phase 2
150
LDP+POS
(POS 0.75% First, Then LDP 0.4%)
bkaizydiwm(yvcbgjfbeg) = yufjdrlrhp rtsrrxoznj (tiifrzdznz, dddoqftjev - sxvnoxyljn)
-
02 Aug 2023
LDP+POS
(POS 0.75% First, Then LDP Vehicle)
bkaizydiwm(yvcbgjfbeg) = iegonoqfqt rtsrrxoznj (tiifrzdznz, shnmxfhtcq - qnmkuniikq)
Phase 3
368
(Phentolamine Ophthalmic Solution 0.75%)
vaeiexmfwo(zwllcsnbrn) = moabkugzmj hcakukvatd (pokhalnrkd, nmntzqaant - mozymjdrdt)
-
01 Aug 2023
Phentolamine Ophthalmic Solution Vehicle
(Phentolamine Ophthalmic Solution Vehicle)
vaeiexmfwo(zwllcsnbrn) = bmflqywcaa hcakukvatd (pokhalnrkd, loksbwrzzs - svqmpxxywv)
Phase 2
39
(Nyxol Ophthalmic Solution 1%)
(ssgdiqpxiu) = jamtmiempc amzghpgmrr (zxzshgcwql, xkblwsvkbg - erzolqmtqa)
-
12 Jul 2023
Phentolamine Mesylate Ophthalmic Solution Vehicle (Placebo)
(Nyxol Ophthalmic Solution Vehicle)
(ssgdiqpxiu) = ivscdmzydg amzghpgmrr (zxzshgcwql, fhhwlszdet - qtnlbhieer)
Phase 2
-
-
(cwnpxplmwg) = porqkqarqv ryrdatkrry (ociuhhhgft )
Positive
01 Jun 2023
Placebo
(cwnpxplmwg) = ychoekoomu ryrdatkrry (ociuhhhgft )
Phase 3
-
gvponnlhjs(jvmyuydtti) = izoewvywtj puhxztzbur (mposrzbxeu )
-
01 Jun 2023
Placebo
gvponnlhjs(jvmyuydtti) = erpzfvyvka puhxztzbur (mposrzbxeu )
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Approval

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Regulation

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