The Largest Personal Injury Firm in Texas. Serving Clients Nationwide.
Austin 512-520-0221 Corpus Christi 361-254-7873 San Antonio 210-874-2615 Nationwide Toll Free 866-517-5659
Contact us 24/7 Contact us 24/7

Our attorneys and staff continue to work through COVID-19 and remain available 24/7, ready to fight for you. Our video conferencing, case management, and telecommunications systems allow us to stay in constant contact with our clients and pursue their claims without interruption – all without our clients leaving the comfort of their homes. You focus on staying healthy and safe, we’re here to handle the rest.


Avelox (moxifloxacin hydrochloride) is a synthetic fluoroquinolone antibacterial agent prescribed to treat acute bacterial sinusitis, pneumonia, skin infections, intra-abdominal infections, and plague. The drug was first patented by Bayer in 1991 and approved by the U.S. Food and Drug Administration (FDA) in 1999 to treat specific bacterial infections (approved usage was later expanded).

Avelox comes in tablet form for oral use as well as an injection for intravenous use. Common side effects associated with Avelox treatment include:

  • Diarrhea
  • Headache
  • Dizziness
  • Nausea

Fluoroquinolones, like Avelox, have been associated with severe, life-altering side effects that can cause irreversible and serious health issues.


In 2016, the FDA updated a warning regarding the safety of fluoroquinolone antibacterial medications like Avelox. The warning pertained to disabling and potentially permanent side effects of the tendons, muscles, joints, nerves, and central nervous system. The agency mandated that a black box warning be added to every fluoroquinolone medication label, warning of the risks associated with the drug.

Patients taking Avelox are at an increased risk of developing tendinitis and tendon rupture, most frequently involving the Achilles tendon, rotator cuff, hand, biceps, and thumb. These severe side effects can occur within hours of starting treatment. The risk is higher in patients over the age of 60.

Peripheral neuropathy, or weakness, numbness, or pain from nerve damage, can occur when taking Avelox. In some patients, symptoms occurred soon after starting treatment and was irreversible in some people. Patients are urged to stop using Avelox if they suffer from:

  • Pain
  • Burning
  • Tingling
  • Numbness
  • Weakness
  • Other alterations of sensation (light touch, pain, temperature)

Severe central nervous system disorders may occur when taking Avelox, including:

  • Convulsions and increased intracranial pressure
  • Toxic psychosis
  • Nervousness
  • Agitation
  • Insomnia
  • Anxiety
  • Nightmares
  • Paranoia
  • Dizziness
  • Confusion
  • Tremors
  • Hallucinations
  • Depression
  • Suicidal thoughts or actions

Avelox can cause these severe symptoms after just the first dose. The FDA has determined that fluoroquinolones should be reserved for use in patients who have no other treatment options for acute bacterial sinusitis, acute bacterial exacerbation of chronic bronchitis, and uncomplicated urinary tract infections because the risk outweighs the benefit in these patients.


Myasthenia gravis is a chronic autoimmune neuromuscular disease characterized by weakness and rapid fatigue of muscles under voluntary control. Signs of myasthenia gravis include weakness of the arm and leg muscles, double vision, drooping eyelids, and difficulties with speech, chewing, swallowing, and breathing. Avelox may exacerbate muscle weakness in patients with myasthenia gravis, which in some postmarketing serious adverse reactions lead to death and ventilator support. Patients with the disease are urged not to take Avelox or drugs like it.


If you or a loved one has suffered a severe side effect from taking the antibacterial drug Avelox, you may be entitled to compensation. The drug has been linked to many serious side effects that could potentially be life-threatening. At Thomas J. Henry, we have the legal and financial resources necessary to take on pharmaceutical companies. Our experienced dangerous drug attorneys are available 24/7, nights and weekends to evaluate your claim. Contact us today.


Contact Us for a FREE Case Review

866-517-5659 •

Do you really want to end conversation?
chat-icon Live chat
avatar Waiting