Last update 13 Sep 2025

Phentolamine Mesylate

Overview

Basic Info

Drug Type
Small molecule drug
Synonyms
2-(N-(m-hydroxyphenyl)-p-toluidinomethyl)imidazoline, Nyxol, phentolamine
+ [22]
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)
Login to view timeline

Structure/Sequence

Molecular FormulaC18H23N3O4S
InChIKeyOGIYDFVHFQEFKQ-UHFFFAOYSA-N
CAS Registry65-28-1

External Link

R&D Status

Approved
10 top approved records.
Login
to view more data
IndicationCountry/LocationOrganizationDate
Mydriasis
United States
25 Sep 2023
Erectile Dysfunction
China
01 Jan 1989
Anesthesia
United States
30 Jan 1952
Developing
10 top R&D records.
Login
to view more data
IndicationHighest PhaseCountry/LocationOrganizationDate
Night BlindnessPhase 3
United States
27 Apr 2023
PresbyopiaPhase 3
United States
22 Dec 2022
Vision, LowPhase 3
United States
30 Dec 2020
Glaucoma, Open-AnglePhase 2
United States
28 May 2019
BlindnessPhase 2
United States
09 Sep 2011
Login to view more data

Clinical Result

Indication
Phase
Evaluation
View All Results
Study
Phase
PopulationAnalyzed EnrollmentGroupResultsEvaluationPublication Date
Phase 3
545
edflnukngh(ghdipebblc) = pmwooafjgb zgcdajcigs (ublyblvvdi )
Met
Positive
26 Jun 2025
Placebo
edflnukngh(ghdipebblc) = oorurlyxwn zgcdajcigs (ublyblvvdi )
Met
Phase 3
333
lfhqyfwlro = mmyksvljmw zavjpvomis (yiczannuhh, hwwblqhvtk - ordbsduief)
-
03 Jun 2025
Low dose pilocarpine vehicle+Phentolamine Opthalmic Solution 0.75%
(Nyxol + Low Dose Pilocarpine Vehicle)
lfhqyfwlro = agxefclpcz zavjpvomis (yiczannuhh, zctbuazgwz - ayirbulsuq)
Phase 3
553
tvrzfcobfo(jsgmfjwwto) = bgifktlmqc mlqijsvchi (cnuprzfrnp )
Positive
16 Sep 2024
placebo
tvrzfcobfo(jsgmfjwwto) = iwcsaaxtea mlqijsvchi (cnuprzfrnp )
Phase 2
24
(Phentolamine Mesylate Ophthalmic Solution 1%)
rdcaedjsjl(ecopxpucih) = zhfiqlemef jmisgdkxxr (yvdykucqpj, 1.8)
-
15 Feb 2024
Phentolamine Mesylate Ophthalmic Solution Vehicle (Placebo)
(Phentolamine Mesylate Ophthalmic Solution Vehicle)
rdcaedjsjl(ecopxpucih) = lmiwhewmvc jmisgdkxxr (yvdykucqpj, 1.5)
Phase 3
553
(MIRA-2)
pvsrzlmtzc(ckfpjzmatw) = mneplbbhvr fjawjfvlum (eusmacadzo )
Positive
25 Sep 2023
Placebo
(MIRA-2)
pvsrzlmtzc(ckfpjzmatw) = ywcnqyhjxz fjawjfvlum (eusmacadzo )
Phase 3
185
(Phentolamine Ophthalmic Solution 0.75%)
jrmrxwjkhj = hwglvvxzfn jhkkgilsnk (kbebcfojcd, elrjtdblyj - gkasgfkscw)
-
14 Aug 2023
Phentolamine Ophthalmic Solution Vehicle (Placebo)
(Phentolamine Ophthalmic Solution Vehicle)
jrmrxwjkhj = vgzesidvbz jhkkgilsnk (kbebcfojcd, whnryqimcv - vqrjtbvlya)
Phase 3
144
(Phentolamine Ophthalmic Solution 0.75%)
xdiomhbbvb = vswskfmxgc berfxolhob (oulxncykcq, olgeyypyba - chbfmaeser)
-
09 Aug 2023
Phentolamine Ophthalmic Solution Vehicle (Placebo)
(Phentolamine Ophthalmic Solution Vehicle)
xdiomhbbvb = qbiovyverh berfxolhob (oulxncykcq, jgdlrfmckd - ejgjruksvi)
Phase 2
150
LDP+POS
(POS 0.75% First, Then LDP 0.4%)
bbncppcjjd = uyhyhqpnxk nsngdzxicn (aewfhfvzps, jikruzdpff - muhluqayju)
-
02 Aug 2023
LDP+POS
(POS 0.75% First, Then LDP Vehicle)
bbncppcjjd = vlkelemkze nsngdzxicn (aewfhfvzps, capeaaacel - rmxftnphey)
Phase 3
23
(Phentolamine Ophthalmic Solution 0.75%)
kntiutncir(krszesiyfb) = kbjhnpotuy luxtgtxhuu (utsbqovfjh, 0.65)
-
02 Aug 2023
Phentolamine Ophthalmic Solution Vehicle
(Phentolamine Ophthalmic Solution Vehicle)
kntiutncir(krszesiyfb) = fqanaorrnz luxtgtxhuu (utsbqovfjh, 0.58)
Phase 3
368
(Phentolamine Ophthalmic Solution 0.75%)
coomymskez(ogiyojhule) = brawfzcoab ukixriuvhk (iiywuuvxzp, 0.7104)
-
01 Aug 2023
Phentolamine Ophthalmic Solution Vehicle
(Phentolamine Ophthalmic Solution Vehicle)
coomymskez(ogiyojhule) = owoguzwtsn ukixriuvhk (iiywuuvxzp, 0.5335)
Login to view more data

Translational Medicine

Boost your research with our translational medicine data.
Boost your research with our translational medicine data.

Deal

Boost your decision using our deal data.
Boost your decision using our deal data.

Core Patent

Boost your research with our Core Patent data.
Boost your research with our Core Patent data.

Clinical Trial

Identify the latest clinical trials across global registries.
Identify the latest clinical trials across global registries.

Approval

Accelerate your research with the latest regulatory approval information.
Accelerate your research with the latest regulatory approval information.

Regulation

Understand key drug designations in just a few clicks with Synapse.
Understand key drug designations in just a few clicks with Synapse.
AI Agents Built for Biopharma Breakthroughs
Accelerate discovery. Empower decisions. Transform outcomes.
Get started for free today!
Accelerate Strategic R&D decision making with Synapse, PatSnap’s AI-powered Connected Innovation Intelligence Platform Built for Life Sciences Professionals.
Start your data trial now!
Synapse data is also accessible to external entities via APIs or data packages. Empower better decisions with the latest in pharmaceutical intelligence.
Bio
Bio Sequences Search & Analysis
Sign up for free
Chemical
Chemical Structures Search & Analysis
Sign up for free