Amrix

Chronic Pain, Physical Therapy, Rest + 2 more

Treatment

20 Active Studies for Amrix

What is Amrix

Cyclobenzaprine

The Generic name of this drug

Treatment Summary

Cyclobenzaprine is a muscle relaxant first developed in 1961 that became available for human use in 1977. It is similar to an antidepressant medication, but it differs by one double bond. This drug is used as a short-term treatment for muscle spasms related to injuries.

Flexeril

is the brand name

image of different drug pills on a surface

Amrix Overview & Background

Brand Name

Generic Name

First FDA Approval

How many FDA approvals?

Flexeril

Cyclobenzaprine

1977

498

Effectiveness

How Amrix Affects Patients

Cyclobenzaprine is a medication used to relax tight muscles and reduce spasms. It works in the brainstem area, but how it works is not yet understood. Its effects usually last 4-6 hours, but it stays in the body longer, with a long half-life. Taking cyclobenzaprine with other serotonin-affecting medications can lead to a condition called serotonin syndrome, which can cause changes in mental status, muscle issues, and other symptoms. If any of these reactions occur, cyclobenzaprine should be stopped right away.

How Amrix works in the body

We don't know exactly how cyclobenzaprine works, but it appears to act on the brainstem. This helps reduce the activity of certain neurons, which then decreases the amount of nerve signals sent out to muscles. It may also work by blocking the serotonin pathway in the spinal cord, which is related to transmitting signals from the brain to the body.

When to interrupt dosage

The advised dosage of Amrix is contingent upon the diagnosed condition, for example Physical Therapy, Rest and Chronic Pain. The dosage amount also relies upon the prescribed method of administration listed in the table beneath.

Condition

Dosage

Administration

Chronic Pain

, 10.0 mg, 5.0 mg, 7.5 mg, 15.0 mg, 30.0 mg, 0.1 mg, 1.0 mg/mg, 2.5 mg/mg, 5.6 mg/mg, 2.8 mg/mg

, Oral, Tablet, Tablet - Oral, Tablet, film coated, Tablet, film coated - Oral, Capsule, extended release, Capsule, extended release - Oral, Kit, Topical, Kit - Topical, Capsule, film coated, extended release, Capsule, film coated, extended release - Oral, Capsule - Oral, Capsule, Kit - Oral, Tablet, coated - Oral, Tablet, coated, Oral; Topical, Kit - Oral; Topical

Physical Therapy

, 10.0 mg, 5.0 mg, 7.5 mg, 15.0 mg, 30.0 mg, 0.1 mg, 1.0 mg/mg, 2.5 mg/mg, 5.6 mg/mg, 2.8 mg/mg

, Oral, Tablet, Tablet - Oral, Tablet, film coated, Tablet, film coated - Oral, Capsule, extended release, Capsule, extended release - Oral, Kit, Topical, Kit - Topical, Capsule, film coated, extended release, Capsule, film coated, extended release - Oral, Capsule - Oral, Capsule, Kit - Oral, Tablet, coated - Oral, Tablet, coated, Oral; Topical, Kit - Oral; Topical

Spasm

, 10.0 mg, 5.0 mg, 7.5 mg, 15.0 mg, 30.0 mg, 0.1 mg, 1.0 mg/mg, 2.5 mg/mg, 5.6 mg/mg, 2.8 mg/mg

, Oral, Tablet, Tablet - Oral, Tablet, film coated, Tablet, film coated - Oral, Capsule, extended release, Capsule, extended release - Oral, Kit, Topical, Kit - Topical, Capsule, film coated, extended release, Capsule, film coated, extended release - Oral, Capsule - Oral, Capsule, Kit - Oral, Tablet, coated - Oral, Tablet, coated, Oral; Topical, Kit - Oral; Topical

Rest

, 10.0 mg, 5.0 mg, 7.5 mg, 15.0 mg, 30.0 mg, 0.1 mg, 1.0 mg/mg, 2.5 mg/mg, 5.6 mg/mg, 2.8 mg/mg

, Oral, Tablet, Tablet - Oral, Tablet, film coated, Tablet, film coated - Oral, Capsule, extended release, Capsule, extended release - Oral, Kit, Topical, Kit - Topical, Capsule, film coated, extended release, Capsule, film coated, extended release - Oral, Capsule - Oral, Capsule, Kit - Oral, Tablet, coated - Oral, Tablet, coated, Oral; Topical, Kit - Oral; Topical

acute painful musculoskeletal conditions

, 10.0 mg, 5.0 mg, 7.5 mg, 15.0 mg, 30.0 mg, 0.1 mg, 1.0 mg/mg, 2.5 mg/mg, 5.6 mg/mg, 2.8 mg/mg

, Oral, Tablet, Tablet - Oral, Tablet, film coated, Tablet, film coated - Oral, Capsule, extended release, Capsule, extended release - Oral, Kit, Topical, Kit - Topical, Capsule, film coated, extended release, Capsule, film coated, extended release - Oral, Capsule - Oral, Capsule, Kit - Oral, Tablet, coated - Oral, Tablet, coated, Oral; Topical, Kit - Oral; Topical

Warnings

Amrix Contraindications

Condition

Risk Level

Notes

Pulse Frequency

Do Not Combine

Heart Block

Do Not Combine

Hyperthyroidism

Do Not Combine

Atrial Fibrillation

Do Not Combine

Heart Block

Do Not Combine

Myocardial Infarction

Do Not Combine

Congestive Heart Failure

Do Not Combine

Severe Hypersensitivity Reactions

Do Not Combine

Cyclobenzaprine may interact with Pulse Frequency

There are 20 known major drug interactions with Amrix.

Common Amrix Drug Interactions

Drug Name

Risk Level

Description

7,8-Dichloro-1,2,3,4-tetrahydroisoquinoline

Major

Cyclobenzaprine may increase the serotonergic activities of 7,8-Dichloro-1,2,3,4-tetrahydroisoquinoline.

Azelastine

Major

Cyclobenzaprine may increase the central nervous system depressant (CNS depressant) activities of Azelastine.

Benmoxin

Major

Cyclobenzaprine may increase the serotonergic activities of Benmoxin.

Brofaromine

Major

Cyclobenzaprine may increase the serotonergic activities of Brofaromine.

Caroxazone

Major

Cyclobenzaprine may increase the serotonergic activities of Caroxazone.

Amrix Toxicity & Overdose Risk

The toxic dose of cyclobenzaprine in mice and rats is 338 mg/kg and 425 mg/kg respectively. Symptoms of overdose can include extreme sleepiness, rapid heartbeat, shaking, confusion, and hallucinations. In rare cases, the overdose can cause cardiac arrest, abnormal heart rhythm, dangerously low blood pressure, seizures, or a severe reaction of the nervous system. If someone has overdosed on cyclobenzaprine, it is recommended to call a poison control center before attempting to treat them. Treatment usually involves removing the drug from the body, closely monitoring their heart rate, and checking for signs of decreased breathing or a low

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

179 active clinical trials are being conducted to evaluate the efficacy of Amrix in providing relief from Muscle Spasms, Physical Therapy and Restorative Rest.

Condition

Clinical Trials

Trial Phases

Rest

0 Actively Recruiting

Spasm

1 Actively Recruiting

Not Applicable

acute painful musculoskeletal conditions

0 Actively Recruiting

Chronic Pain

128 Actively Recruiting

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

Physical Therapy

9 Actively Recruiting

Not Applicable, Phase 2

Amrix Reviews: What are patients saying about Amrix?

5

Patient Review

9/20/2013

Amrix for Muscle Spasm

This drug has helped me immensely. I used to suffer from daily spasms, but this medication has all but stopped them. It's also much easier to tolerate than the last one I was on; that one had way too many side effects for me to handle.

5

Patient Review

6/24/2014

Amrix for Disorder characterized by Stiff, Tender & Painful Muscles

This is the first medication I've tried for my si joint dysfunction that has actually made a significant difference. I don't experience any grogginess, just less pain.

5

Patient Review

12/4/2013

Amrix for Muscle Spasm

This medication has been a game-changer for me. I have MS and it's the first afternoon drug that doesn't make me drowsy but still relieves my spasms.

4.7

Patient Review

5/19/2014

Amrix for Disorder characterized by Stiff, Tender & Painful Muscles

I was very surprised at how well this worked, especially given the high price tag. I would definitely recommend it to anyone who needs relief from muscle pain.

4.7

Patient Review

8/17/2013

Amrix for Disorder characterized by Stiff, Tender & Painful Muscles

This treatment has made life worth living again.

4.7

Patient Review

12/18/2011

Amrix for Muscle Spasm

4.7

Patient Review

5/3/2012

Amrix for Muscle Spasm

4

Patient Review

12/26/2015

Amrix for Muscle Spasm

I've been dealing with some pretty severe chronic pain in my upper back for a while now, and I've tried lots of different treatments. Finally, I found something that works: Amrix (brand name Prolax ER 15/30mg). It's helped me sleep better and the pain is gone. The only downside is that it gives me a sore throat, but overall it's a great medication.

3.3

Patient Review

4/1/2013

Amrix for Muscle Spasm

This medication helped with my coughing and breathing, but I found it difficult to take as directed.

3

Patient Review

4/2/2013

Amrix for Disorder characterized by Stiff, Tender & Painful Muscles

The medication does its job well enough, but it's certainly not extraordinary. The real issue I have with it is the cost; even with good insurance, I'm still paying $75 per prescription. That's just too expensive for me, so I'll be looking for a cheaper alternative.

1.7

Patient Review

1/3/2014

Amrix for Disorder characterized by Stiff, Tender & Painful Muscles

I just started this medicine, and I wanted to know about the potential side effects before taking it.

1

Patient Review

1/9/2012

Amrix for Disorder characterized by Stiff, Tender & Painful Muscles

image of drug pills surrounding a glass of water symbolizing drug consumption

Patient Q&A Section about amrix

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

What does cyclobenzaprine do to your body?

"Cyclobenzaprine is used to relax muscles, relieve pain, stiffness, and discomfort caused by strains, sprains, or injuries."

Answered by AI

Is Amrix the same as Flexeril?

"Amrix and Flexeril are both brand-name medications that contain the active drug cyclobenzaprine. Flexeril has been discontinued and is no longer available. Amrix is a long-acting form of cyclobenzaprine that comes in an extended-release (ER) capsule. It is taken by mouth once a day."

Answered by AI

Is Amrix a benzo?

"Some common benzodiazepines are diazepam (Valium), alprazolam (Xanax), lorazepam (Ativan), temazepam (Restoril), and clonazepam (Klonopin). Cyclobenzaprine is also known by the brand names Flexeril and Amrix."

Answered by AI

What is the drug Amrix used for?

"Cyclobenzaprine is a medication used to treat muscle spasms. It is typically used in conjunction with rest and physical therapy. The medication works by helping to relax the muscles. Cyclobenzaprine is not recommended for use in older adults due to an increased risk of side effects."

Answered by AI

Clinical Trials for Amrix

Image of Northwell health physician partners in Bay Shore, United States.

Lidocaine Injection vs Saline for Pain Management

18+
Female
Bay Shore, NY

We are doing this study to find the best way to manage pain during a procedure called urethral bulking. This procedure treats urine leakage that happens with coughing, laughing, sneezing, or physical activity. It works by injecting a gel-like substance around the urethra (the tube that urine comes out of) to help it stay closed when it should. We use a numbing gel (called lidocaine jelly) inside the urethra to help with pain during the procedure. In this study, we will also be administering lidocaine (numbing medication) injected around the urethra or a saline placebo (medical grade saltwater) injection, which has no numbing effect. A placebo is something that looks like a real treatment but doesn't have any medical effect. Both the lidocaine and the saline would be injected around the urethra using a small needle, and we'll compare how well they work at reducing pain.

Phase 4
Recruiting

Northwell health physician partners (+2 Sites)

Image of Endeavor Health/NorthShore in Skokie, United States.

Tranexamic Acid for Anterior Cruciate Ligament Injury

14 - 25
All Sexes
Skokie, IL

The goal of this clinical trial is to learn whether taking oral tranexamic acid (TXA) for one week after anterior cruciate ligament (ACL) reconstruction improves recovery in adolescents and young adults aged 14 to 25 years. All participants receive standard intravenous TXA during surgery. The main questions it aims to answer are: * Does oral TXA lower knee pain at 2 weeks after surgery? * Does oral TXA reduce the amount of opioid pain medicine used in the first 2 weeks? * Does oral TXA improve knee range of motion at 2 weeks? Researchers will compare oral TXA to a placebo (a look-alike capsule with no active drug) to see if oral TXA improves pain, opioid use, motion, strength, knee function, and return to sport. Participants will: * Take 3 capsules (oral TXA or placebo) once a day for the first 8 days after surgery (day of surgery through day 7) * Keep a home diary for 2 weeks recording pain scores, opioid pills taken and any side effects * Return for study visits at 2 weeks, 6 weeks, 12 weeks, 6 months, 9 months and 1 year for pain, motion, strength and function testing * Complete a survey at 2 years

Phase 3
Waitlist Available

Endeavor Health/NorthShore (+5 Sites)

Image of Hospital for Special Surgery in New York, United States.

Suzetrigine for Pain Management in Total Knee Replacement

18 - 80
All Sexes
New York, NY

Total knee replacements are among the most common and painful orthopedic procedures performed worldwide, often requiring intensive analgesia to support early ambulation and recovery. Despite widespread use of multimodal regimens, many patients still rely on opioids, which can cause sedation, nausea, constipation, and long-term dependency. Evaluating suzetrigine in this high-need population may improve recovery trajectories, reduce opioid consumption, and support enhanced recovery protocols. Given the growing surgical volume and the emphasis on opioid-sparing strategies, rigorous investigation of suzetrigine's efficacy in total knee replacement is of high clinical value. In this confirmatory (phase III) trial, patients undergoing primary total knee replacement will be randomized to receive either suzetrigine or placebo for 2 weeks (14 days), with the loading dose administered prior to surgery. The primary outcome is cumulative 48-hour opioid consumption in oral morphine equivalents starting from entry into the post-anesthesia care unit (PACU).

Phase 3
Recruiting

Hospital for Special Surgery

Meghan Kirskey, MD

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Cancer Pain 101 for Cancer Pain

18+
All Sexes
Birmingham, AL

This is a Stage 1 study of a behavioral intervention, which means that a new intervention is being pilot tested to understand whether it is acceptable and feasible for people with advanced cancer to use. The purpose of this study is to evaluate whether a series of 3 10-minute videos may help improve prescription opioid pain management and opioid stigma for people living with advanced cancer. Approximately 45 participants will take part in this study at the University of Alabama at Birmingham. People who choose to participate in this study will complete a series of baseline questionnaires, and then will be randomized to one of two groups: 1) the group that gets the video intervention, or 2) the group that gets a written handout with information about cancer pain. About 4 weeks later, all participants will also be asked to fill out another series of questionnaires.

Waitlist Available
Has No Placebo

University of Alabama at Birmingham

Hailey W Bulls, PhD

Image of M Health Fairview Clinic - Oxboro in Minneapolis, United States.

TENS and Vibration for Procedural Pain

18+
All Sexes
Minneapolis, MN

The E-MOHS Trial is a randomized controlled trial evaluating whether active vibration plus transcutaneous electrical nerve stimulation reduces pain during local anesthetic infiltration in adults undergoing Mohs micrographic surgery or dermatologic excision. Participants will be randomized to active vibration:TENS or sham TENS during the first local anesthetic administration. The primary outcome is patient-reported infiltration pain during active local anesthetic infiltration, measured using the 11-point Numeric Rating Scale. Secondary outcomes include infiltration pain measured using a Visual Analog Scale, perioperative anxiety, participant satisfaction, willingness to reuse the device, operator-rated ease of use and sterile-field compatibility, blinding integrity, and adverse events.

Waitlist Available
Background Therapy Allowed

M Health Fairview Clinic - Oxboro (+3 Sites)

Ian Maher, MD

Image of St. Joseph's Hospital London in London, Canada.

Knee RFA for Osteoarthritis

18+
All Sexes
London, Canada

The goal of this clinical trial is to understand whether changes in brain activity, measured using functional near-infrared spectroscopy (fNIRS), are related to how well patients with knee osteoarthritis respond to genicular nerve radiofrequency ablation (GNRFA). The main questions it aims to answer are: 1. Are baseline brain activation patterns measured using fNIRS associated with clinically meaningful treatment responses to GNRFA? 2. What changes in brain activation patterns do we see overtime after GNRFA in those who are responders to treatments, vs. those who are non-responders? Participants will: * Receive a diagnostic genicular nerve (GN) block * Receive a GNRFA if they experience at least 50% pain relief from the GN block * Come to the clinic as baseline, approximately one week later, and then 3-months after that for assessment * Fill out questionnaires once every 3-months for up to 12-months

Waitlist Available
Has No Placebo

St. Joseph's Hospital London

Eldon Loh, MD

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Image of Stephenson Cancer Center - Tulsa Location in Tulsa, United States.

Empowered Relief for Pain in Cancer

18+
All Sexes
Tulsa, OK

This project will evaluate the feasibility and acceptability of Empowered Relief (ER) among American Indian adults who are currently receiving or have completed active cancer treatments at Stephenson Cancer Center (SCC). ER is a single-session, Zoom-based, 2-hour, skills-based pain management class delivered by certified instructors. Participants learn three core pain relief skills, develop a personalized plan, and receive access to a free binaural audio app for daily practice. ER has demonstrated moderate efficacy in individuals with chronic non-cancer pain, reducing pain intensity, pain interference, pain-related distress (pain catastrophizing), sleep disturbance, and anxiety at 3 and 6 months post-treatment. Because of its brief, didactic nature and Zoom delivery, ER can accommodate large class sizes and may address accessibility disparities among underserved cancer populations. While ER is being studied across various non-cancer populations and has been adopted as standard of care in leading healthcare institutions in the U.S. and abroad, it has not been tested in American Indians with cancer.

Waitlist Available
Has No Placebo

Stephenson Cancer Center - Tulsa Location

Sophia You

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Lavender-Sandalwood Aromatherapy for C-Section Recovery

18+
Female
Houston, TX

The purpose of this randomized controlled study is to explore whether lavender sandalwood aromatherapy can support comfort, mood, pain relief, and overall satisfaction for participants recovering from a scheduled cesarean section without complications. The main questions this study aims to answer are: * How does lavender sandalwood aromatherapy affect participants' mood during postpartum recovery after a cesarean section? * Does lavender sandalwood aromatherapy help reduce pain during recovery? * Does lavender sandalwood aromatherapy improve participants' overall satisfaction with their recovery experience? Researchers will compare participants who receive lavender-sandalwood aromatherapy with those who do not to determine whether it improves mood, reduces pain, and enhances patient satisfaction. Participants will be asked to: * Wear aromatherapy tabs on their gown for 24 hours. * Have the aromatherapy tabs applied 24 hours after the cesarean section and removed 48 hours after the cesarean section. * Complete surveys at 24 hours and 48 hours after the cesarean section. This will apply to both the control and intervention groups.

Waitlist Available
Has No Placebo

Memorial Hermann Memorial City Medical Center

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