Istalol

Migraine, Open-angle glaucoma, Migraine Disorders + 6 more

Treatment

20 Active Studies for Istalol

What is Istalol

Timolol

The Generic name of this drug

Treatment Summary

Timolol is a medication used to reduce pressure in the eyes and treat high blood pressure. It is usually given as eye drops or taken orally as a tablet. Timolol was approved by the FDA in 1978 and is available from multiple manufacturers. It is a reliable and effective treatment for open-angle glaucoma and hypertension.

Timoptic

is the brand name

image of different drug pills on a surface

Istalol Overview & Background

Brand Name

Generic Name

First FDA Approval

How many FDA approvals?

Timoptic

Timolol

1978

167

Effectiveness

How Istalol Affects Patients

Timolol is a drug that can be administered in the form of eye drops or tablets. Eye drops cause a rapid decrease in intraocular pressure, and tablets reduce blood pressure, heart rate, and sympathetic activity. The effects of timolol usually take place within 20 minutes of the eye drops being administered, and can last up to 24 hours if the 0.5% or 0.25% doses are taken.

How Istalol works in the body

Timolol works by blocking certain receptors in your body. It blocks receptors in your heart which help to regulate blood pressure and heart rate. It blocks receptors in your blood vessels, which makes it easier for your blood to flow and reduces your blood pressure. Finally, it also affects receptors in your eyes, which helps to reduce pressure in the eye. The exact way it works in the eye is still unknown, but it likely affects the flow of fluids in the eye, reducing pressure.

When to interrupt dosage

The measure of Istalol is contingent upon the diagnosed situation, such as Open Angle Glaucoma, necessitating adjunctive or replacement treatment and Ocular Hypertension. The dose varies in accordance with the technique of administration (e.g. Ophthalmic or Solution, gel forming/drops) presented in the table below.

Condition

Dosage

Administration

Migraine Disorders

5.0 mg/mL, , 5.0 mg, 10.0 mg, 20.0 mg, 2.5 mg/mL, 6.8 mg/mL, 6.83 mg/mL, 2.56 mg/mL, 5.12 mg/mL, 0.5 %, 0.25 %, 3.4 mg/mL, 0.1 mg/mL

Ophthalmic, Solution - Ophthalmic, Solution, , Oral, Tablet, Tablet - Oral, Solution / drops, Solution / drops - Ophthalmic, Solution, gel forming, extended release, Solution, gel forming, extended release - Ophthalmic, Suspension / drops, Suspension / drops - Ophthalmic, Suspension - Ophthalmic, Suspension, Liquid, Solution, gel forming / drops - Ophthalmic, Solution, gel forming / drops, Liquid - Ophthalmic

Open-angle glaucoma

5.0 mg/mL, , 5.0 mg, 10.0 mg, 20.0 mg, 2.5 mg/mL, 6.8 mg/mL, 6.83 mg/mL, 2.56 mg/mL, 5.12 mg/mL, 0.5 %, 0.25 %, 3.4 mg/mL, 0.1 mg/mL

Ophthalmic, Solution - Ophthalmic, Solution, , Oral, Tablet, Tablet - Oral, Solution / drops, Solution / drops - Ophthalmic, Solution, gel forming, extended release, Solution, gel forming, extended release - Ophthalmic, Suspension / drops, Suspension / drops - Ophthalmic, Suspension - Ophthalmic, Suspension, Liquid, Solution, gel forming / drops - Ophthalmic, Solution, gel forming / drops, Liquid - Ophthalmic

Migraine

5.0 mg/mL, , 5.0 mg, 10.0 mg, 20.0 mg, 2.5 mg/mL, 6.8 mg/mL, 6.83 mg/mL, 2.56 mg/mL, 5.12 mg/mL, 0.5 %, 0.25 %, 3.4 mg/mL, 0.1 mg/mL

Ophthalmic, Solution - Ophthalmic, Solution, , Oral, Tablet, Tablet - Oral, Solution / drops, Solution / drops - Ophthalmic, Solution, gel forming, extended release, Solution, gel forming, extended release - Ophthalmic, Suspension / drops, Suspension / drops - Ophthalmic, Suspension - Ophthalmic, Suspension, Liquid, Solution, gel forming / drops - Ophthalmic, Solution, gel forming / drops, Liquid - Ophthalmic

inadequate response to other therapeutic measures

5.0 mg/mL, , 5.0 mg, 10.0 mg, 20.0 mg, 2.5 mg/mL, 6.8 mg/mL, 6.83 mg/mL, 2.56 mg/mL, 5.12 mg/mL, 0.5 %, 0.25 %, 3.4 mg/mL, 0.1 mg/mL

Ophthalmic, Solution - Ophthalmic, Solution, , Oral, Tablet, Tablet - Oral, Solution / drops, Solution / drops - Ophthalmic, Solution, gel forming, extended release, Solution, gel forming, extended release - Ophthalmic, Suspension / drops, Suspension / drops - Ophthalmic, Suspension - Ophthalmic, Suspension, Liquid, Solution, gel forming / drops - Ophthalmic, Solution, gel forming / drops, Liquid - Ophthalmic

insufficient response to beta-blockers

5.0 mg/mL, , 5.0 mg, 10.0 mg, 20.0 mg, 2.5 mg/mL, 6.8 mg/mL, 6.83 mg/mL, 2.56 mg/mL, 5.12 mg/mL, 0.5 %, 0.25 %, 3.4 mg/mL, 0.1 mg/mL

Ophthalmic, Solution - Ophthalmic, Solution, , Oral, Tablet, Tablet - Oral, Solution / drops, Solution / drops - Ophthalmic, Solution, gel forming, extended release, Solution, gel forming, extended release - Ophthalmic, Suspension / drops, Suspension / drops - Ophthalmic, Suspension - Ophthalmic, Suspension, Liquid, Solution, gel forming / drops - Ophthalmic, Solution, gel forming / drops, Liquid - Ophthalmic

requiring adjunctive or replacement therapy

5.0 mg/mL, , 5.0 mg, 10.0 mg, 20.0 mg, 2.5 mg/mL, 6.8 mg/mL, 6.83 mg/mL, 2.56 mg/mL, 5.12 mg/mL, 0.5 %, 0.25 %, 3.4 mg/mL, 0.1 mg/mL

Ophthalmic, Solution - Ophthalmic, Solution, , Oral, Tablet, Tablet - Oral, Solution / drops, Solution / drops - Ophthalmic, Solution, gel forming, extended release, Solution, gel forming, extended release - Ophthalmic, Suspension / drops, Suspension / drops - Ophthalmic, Suspension - Ophthalmic, Suspension, Liquid, Solution, gel forming / drops - Ophthalmic, Solution, gel forming / drops, Liquid - Ophthalmic

Glaucoma

5.0 mg/mL, , 5.0 mg, 10.0 mg, 20.0 mg, 2.5 mg/mL, 6.8 mg/mL, 6.83 mg/mL, 2.56 mg/mL, 5.12 mg/mL, 0.5 %, 0.25 %, 3.4 mg/mL, 0.1 mg/mL

Ophthalmic, Solution - Ophthalmic, Solution, , Oral, Tablet, Tablet - Oral, Solution / drops, Solution / drops - Ophthalmic, Solution, gel forming, extended release, Solution, gel forming, extended release - Ophthalmic, Suspension / drops, Suspension / drops - Ophthalmic, Suspension - Ophthalmic, Suspension, Liquid, Solution, gel forming / drops - Ophthalmic, Solution, gel forming / drops, Liquid - Ophthalmic

Open Angle Glaucoma

5.0 mg/mL, , 5.0 mg, 10.0 mg, 20.0 mg, 2.5 mg/mL, 6.8 mg/mL, 6.83 mg/mL, 2.56 mg/mL, 5.12 mg/mL, 0.5 %, 0.25 %, 3.4 mg/mL, 0.1 mg/mL

Ophthalmic, Solution - Ophthalmic, Solution, , Oral, Tablet, Tablet - Oral, Solution / drops, Solution / drops - Ophthalmic, Solution, gel forming, extended release, Solution, gel forming, extended release - Ophthalmic, Suspension / drops, Suspension / drops - Ophthalmic, Suspension - Ophthalmic, Suspension, Liquid, Solution, gel forming / drops - Ophthalmic, Solution, gel forming / drops, Liquid - Ophthalmic

Ocular Hypertension

5.0 mg/mL, , 5.0 mg, 10.0 mg, 20.0 mg, 2.5 mg/mL, 6.8 mg/mL, 6.83 mg/mL, 2.56 mg/mL, 5.12 mg/mL, 0.5 %, 0.25 %, 3.4 mg/mL, 0.1 mg/mL

Ophthalmic, Solution - Ophthalmic, Solution, , Oral, Tablet, Tablet - Oral, Solution / drops, Solution / drops - Ophthalmic, Solution, gel forming, extended release, Solution, gel forming, extended release - Ophthalmic, Suspension / drops, Suspension / drops - Ophthalmic, Suspension - Ophthalmic, Suspension, Liquid, Solution, gel forming / drops - Ophthalmic, Solution, gel forming / drops, Liquid - Ophthalmic

Warnings

Istalol Contraindications

Condition

Risk Level

Notes

Lung Diseases, Obstructive

Do Not Combine

Sinus Bradycardia

Do Not Combine

Shock, Cardiogenic

Do Not Combine

Atrioventricular Block

Do Not Combine

Asthma

Do Not Combine

Heart Failure

Do Not Combine

Severe Hypersensitivity Reactions

Do Not Combine

Timolol may interact with Pulse Frequency

There are 20 known major drug interactions with Istalol.

Common Istalol Drug Interactions

Drug Name

Risk Level

Description

4-Bromo-2,5-dimethoxyphenethylamine

Major

The therapeutic efficacy of 4-Bromo-2,5-dimethoxyphenethylamine can be decreased when used in combination with Timolol.

4-Methoxyamphetamine

Major

The therapeutic efficacy of 4-Methoxyamphetamine can be decreased when used in combination with Timolol.

Abediterol

Major

Timolol may decrease the bronchodilatory activities of Abediterol.

Adrafinil

Major

The therapeutic efficacy of Adrafinil can be decreased when used in combination with Timolol.

Agrostis gigantea pollen

Major

The risk of a hypersensitivity reaction to Agrostis gigantea pollen is increased when it is combined with Timolol.

Istalol Toxicity & Overdose Risk

The toxic dose of timolol in rats is 1028mg/kg and 1137mg/kg in mice. Those who overdose on timolol may feel dizzy, have a headache, difficulty breathing, and a slower than normal heart rate. In extreme cases, an overdose of timolol can lead to cardiac arrest. Dialysis can be used to reverse the effects of an overdose, although it may not be as effective for those with kidney problems.

image of a doctor in a lab doing drug, clinical research

Istalol Novel Uses: Which Conditions Have a Clinical Trial Featuring Istalol?

172 active studies are presently investigating the potential of Istalol to provide a therapeutic benefit in cases of inadequate response to beta-blockers, other therapies, or necessitating adjunct or replacement therapy.

Condition

Clinical Trials

Trial Phases

Open-angle glaucoma

47 Actively Recruiting

Phase 2, Not Applicable, Phase 3, Phase 4, Early Phase 1, Phase 1

Open Angle Glaucoma

11 Actively Recruiting

Phase 3, Not Applicable, Phase 4, Phase 2

Ocular Hypertension

11 Actively Recruiting

Phase 3, Phase 1, Phase 2, Not Applicable, Phase 4

requiring adjunctive or replacement therapy

0 Actively Recruiting

inadequate response to other therapeutic measures

0 Actively Recruiting

Migraine Disorders

1 Actively Recruiting

Phase 3

Migraine

51 Actively Recruiting

Phase 4, Not Applicable, Phase 1, Phase 3, Phase 2, Early Phase 1

Glaucoma

0 Actively Recruiting

insufficient response to beta-blockers

0 Actively Recruiting

Istalol Reviews: What are patients saying about Istalol?

5

Patient Review

12/11/2013

Istalol for High Eye Pressure or Glaucoma that May Worsen without Treatment

Istalol is very effective, but it's also quite expensive. I've been using it since 2004 with great results, so even though it's pricey, I feel like it's worth the investment to protect my eyesight.

5

Patient Review

9/4/2013

Istalol for Closed Angle Glaucoma

This medicine was effective when others have failed.

5

Patient Review

11/7/2007

Istalol for High Eye Pressure or Glaucoma that May Worsen without Treatment

5

Patient Review

9/22/2008

Istalol for Closed Angle Glaucoma

4.7

Patient Review

1/19/2010

Istalol for Wide-Angle Glaucoma

There's a fair amount of discomfort associated with this treatment, but it's worth it for the results.

4.3

Patient Review

3/14/2013

Istalol for Wide-Angle Glaucoma

The only downside I've experienced is that my eyes have stayed swollen and irritated. They look broken out, especially above my eyelids and under my bottom eyelashes, from all the rubbing even though I know I shouldn't.

3.7

Patient Review

10/19/2011

Istalol for Increased Pressure in the Eye

Since I began using Istalol Drops 9 weeks ago, I have experienced short-term burning and stinging sensations when first putting the drops in. About 4 weeks ago, my tongue started to feel sensitive and like it was being burned. The severity of these symptoms has continued to worsen until now my tongue feels raw and swollen. I am wondering if this is due to the Istalol since it is the only change I have had in medications or routine. My blood pressure has also increased. Has anyone else experienced these symtoms while on Istalol?

3.3

Patient Review

10/9/2017

Istalol for High Eye Pressure or Glaucoma that May Worsen without Treatment

I felt a burning sensation in both of my eyes when I first applied this medication. However, it dissipated after a few minutes. My doctor wants me to keep using the drops to see if they will help reduce the pressure in my eyes more than my original prescription. If the stinging continues or other symptoms develop, I will stop using them and go back to the original prescribed drops.

3

Patient Review

10/21/2010

Istalol for High Eye Pressure or Glaucoma that May Worsen without Treatment

I unfortunately experienced some pain after using this product. After a month or so of use, I also developed headaches and increased blood sugar levels. While it did help control my eye pressure, the other problems led me to discontinue use.

3

Patient Review

5/25/2013

Istalol for High Eye Pressure or Glaucoma that May Worsen without Treatment

I've been on this medication for a little over two years now. When I first started, my distance vision was still great and I could adjust my eyes from light to dark pretty quickly. However, now I've lost some of my distance vision and find myself more short of breath.

2.7

Patient Review

3/6/2010

Istalol for Wide-Angle Glaucoma

The directions say not to squeeze the sides of the bottle, but due to my arthritis and carpel tunnel, this is the only way I can get the drops in my eyes. If it came with an eye dropper, that would be much easier.

2

Patient Review

2/9/2009

Istalol for Increased Pressure in the Eye in the Absence of a Lens

The first dose of one drop just caused some itching. The next day the drop caused the itching and the tissue around the eye swelled up. It took a day and a half for the swelling to go down. The Dr has since changed my prescription.

1.7

Patient Review

5/6/2011

Istalol for Closed Angle Glaucoma

Unfortunately, I had a really bad reaction to this medication. My eye started stinging shortly after using it and within a few hours my eye was swollen shut. If you have any history of allergies, I would recommend avoiding this treatment.
image of drug pills surrounding a glass of water symbolizing drug consumption

Patient Q&A Section about istalol

These questions and answers are submitted by anonymous patients, and have not been verified by our internal team.

What is Istalol used for?

"Istalol is a prescription medicine used to treat the symptoms of Ocular Hypertension. Istalol may be used alone or with other medications. Istalol belongs to a class of drugs called Antiglaucoma, Beta-Blockers. The safety and effectiveness of Istalol in children younger than 2 years of age is not known."

Answered by AI

How much does Istalol cost?

"Without insurance, Istalol costs $231.84. However, if you use a SingleCare Istalol coupon, you can pay only $51.94 for the same amount."

Answered by AI

What is the generic for Istalol?

"Ophthalmic timolol maleate is available in different strengths and forms, including 0.25% and 0.5% gel forming solutions and 0.25% and 0.5% solutions. These forms of timolol maleate have the same indications as Istalol."

Answered by AI

Is Istalol the same as timolol?

"The drugs Timoptic, Istalol, and Betimol all come as eye drops and contain the active drug ingredient timolol. However, Timoptic and Istalol both contain timolol maleate while Betimol contains timolol hemihydrate."

Answered by AI

Clinical Trials for Istalol

Image of Byers Eye Institute in Palo Alto, United States.

LLM-Based Education for Glaucoma

18+
All Sexes
Palo Alto, CA

The purpose of this study is to evaluate whether a large language model (LLM)-based audiovisual educational tool improves the test time and reliability of standard automated perimetry (SAP) using the SITA Standard 24-2 protocol in English-speaking glaucoma patients. Glaucoma is a disease that can lead to blindness if not properly monitored and treated. One of the most important tests for glaucoma is the visual field (VF) test, which checks how well a person can see in different directions. However, this test is difficult for many patients to perform correctly, especially if they don't fully understand how it works. Unreliable test results can lead to repeated visits, wasted time, and incorrect treatment decisions. This study is testing whether a computer-based educational tool, powered by artificial intelligence (AI), can help patients better understand the VF test before taking it. The study team want to see if this helps make the test results more reliable. The goal is to improve the quality of care while reducing the burden on patients and clinic staff. The LLMs will be used as an educational tool only, not for the diagnosis of disease or other conditions, or in the cure, mitigation, treatment, or prevention of disease.

Waitlist Available
Has No Placebo

Byers Eye Institute

Robert T Chang, MD

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We made a collection of clinical trials featuring Istalol, we think they might fit your search criteria.
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Image of Arizona State University in Phoenix, United States.

App-based Breathing Program for Migraine

18+
All Sexes
Phoenix, AZ

Migraine is one of the most common neurological disorders, characterized by recurrent headaches, sensitivity to light and movement, nausea, and autonomic dysregulation. Although mind-body interventions like biofeedback have shown their efficacy, they remain underutilized due to barriers such as transportation, time constraints, lack of awareness, stigma, and cost. A targeted approach to enhancing HRV is HRV biofeedback (HRVB), a technique using visual or auditory feedback to help people regulate HRV through slow-paced breathing and positive emotional regulation to promote ANS balance and emotional resilience. Investigators will conduct a remotely delivered pilot RCT of an 8-week, 10 min/day, novel app-based HRVB intervention compared to a sham control intervention (matching intervention time and attention with no biofeedback component) in adult with chronic migraine. Investigators hypothesize data collected from the study will: a) support the feasibility and acceptability of the remotely delivered app-based HRVB intervention among adults with chronic migraine, and b) provide insights into refining the intervention by examining patterns of change in migraine and psychological outcomes from pre- to post-intervention.

Waitlist Available
Online Trial

Arizona State University

Image of The Royal Alexandra Hospital in Edmonton, Canada.

Graft Selection for Glaucoma Surgery

18 - 110
All Sexes
Edmonton, Canada

Glaucoma refers to a group of progressive optic neuropathies that lead to permanent vision loss. Glaucoma is the leading cause of irreversible blindness globally. In 2020, it was estimated to affect 76 million individuals worldwide, with projections indicating this number will rise to 111.8 million by 2040. In Canada, glaucoma affects an estimated 2.7-7.5% of individuals over the age of 50, contributing substantially to the national disease burden. This condition is linked to damage of the optic nerve due to elevated intraocular pressure (IOP; raised eye pressure), which results in the loss of retinal ganglion cells. Therefore, most of the treatments are guided towards reducing the IOP either via using laser, medications or surgery. Glaucoma surgery is typically reserved for cases where IOP remains uncontrolled while on maximum tolerated medical therapy and/or where glaucoma progression warrants surgery. The goal of many glaucoma surgeries is to divert aqueous humor from the anterior chamber to the subconjunctival space, therefore reducing intraocular pressure. The device used for this purpose are the PRESERFLO™ MicroShunt (Glaukos Corporation, Laguna Hills, CA, USA) (the documents will interchangeably use terms "stent" and "shunt" to refer to these devices in the text below). The device is implanted using the ab externo approach to channel fluid from the anterior chamber to the subconjunctival/subtenon space. To reduce postoperative fibrosis and inhibit fibroblast activity that could obstruct flow and lead to device failure, 5-fluorouracil (5-FU) or mitomycin C (MMC) are administered. Additionally, a double-layered closure of conjunctiva and Tenon's is performed to minimize Tenon's migration and blockage of tenon the stents. Despite these measures, stent encapsulation and failure are still too common requiring revisions and bleb needling in 2-20% of cases within the first 12 months of follow-up. This project will involve a series of studies evaluating graft selection in PreserFlo MicroShunt implantation, focusing on donor sclera, cornea, and pericardium as patch graft materials. First, the investigators will conduct a prospective, randomized study comparing clinical outcomes between these graft types. Outcomes of interest will include surgical success rates, post-operative hypotony, tube erosion, conjunctival complications, infection, and overall device longevity. Donor sclera has long been used as a patch graft in glaucoma drainage device surgery and is associated with low erosion rates and reliable long-term results. Corneal tissue is increasingly used due to its transparency and availability through eye banks, with demonstrated safety in ocular surface reconstruction and tube coverage. Pericardium is another durable, biocompatible option, historically applied in both cardiovascular and ocular surgery, and has shown effectiveness as a patch graft in glaucoma drainage implants. This comparison will extend to both primary implantation and revision surgeries, recognizing the high clinical relevance of graft performance in complex cases. Building on these results, the investigators will then perform a cost-effectiveness analysis of graft strategies, incorporating surgical time, post-operative management, complication rates, and need for re-operation. An economic model will be developed to evaluate costs and resource utilization associated with each material, providing valuable data for policy and surgical decision-making. Finally, the investigators will conduct a patient-reported outcome (PRO) study to assess patient comfort and satisfaction with different grafts. Surveys will evaluate domains such as foreign body sensation, cosmesis, and overall satisfaction at key time points (immediate post-operative period, 1 week, 3 weeks, and 3 months). These results will highlight the patient perspective, an often underrepresented but critical factor in surgical innovation. Together, these studies will comprehensively assess graft selection from surgical, economic, and patient-centered perspectives, informing evidence-based practice in glaucoma care.

Waitlist Available
Has No Placebo

The Royal Alexandra Hospital

Have you considered Istalol clinical trials?

We made a collection of clinical trials featuring Istalol, we think they might fit your search criteria.
Go to Trials

Have you considered Istalol clinical trials?

We made a collection of clinical trials featuring Istalol, we think they might fit your search criteria.
Go to Trials