Tequin (Gatifloxacin) Resource Center | Levin Papantonio | Personal Injury Lawyers | Pensacola, Florida

The antibiotic Tequin, plagued by serious blood-sugar complications, is coming off the market.

Levin Papantonio is not currently accepting cases related to Tequin at this time.

Tequin, also known as gatifloxacin, is an antibiotic used to treat adults with lung, sinus, or urinary tract infections and also to treat certain sexually transmitted diseases caused by germs called bacteria. Sometimes viruses, rather than bacteria, may infect the lungs and sinuses (for example, the common cold). Tequin, like all other antibiotics does not kill viruses. Tequin treats the sexually transmitted disease called gonorrhea. Tequin does not treat other sexually transmitted diseases, including syphilis and non-gonococcal diseases.

Bristol-Myers Squibb manufactures Tequin, which belongs to the class of drugs known as fluoroquinolones. The U.S. Food and Drug Administration approved Tequin in 1999. On April 27, 2006 Bristol-Myers Squibb Co. announced that it would stop making & selling Tequin (gatifloxacin), as the drug has been associated with hyperglycemia (high blood sugar) and hypoglycemia (low blood sugar), both of which are potentially fatal blood-sugar disorders.

Potential side effects of Tequin include, but may not be limited to, nausea, vomiting, stomach pain, diarrhea, dizziness and headache.

Fluoroquinolones, such as Tequin, have been linked to serious side effects. The medication should stop being used immediately if a patient experiences any of the following symptoms:

  • An allergic reaction (difficulty breathing; closing of the throat; swelling of the lips, tongue, or face; or hives)
  • Central nervous system (CNS) side effects including: seizures, dizziness, confusion, tremors, hallucinations, depression, or suicidal thoughts
  • Pain, inflammation, or rupture of a tendon 
  • Hematologic and immunologic adverse reactions 
  • Liver problems

In 2006, Bristol-Myers announced labeling changes for Tequin. The labeling changes, announced by the Tequin manufacturer in a letter to healthcare professionals, updated the prescription information as a result of continued reports of serious cases of hypoglycemia (low blood sugar) and hyperglycemia (high blood sugar) in patients receiving Tequin. Since the approval of Tequin in 1999, there have been rare cases of life-threatening events reported globally in patients treated with the drug. Most of these events were reversible when properly managed, but a few had fatal outcomes.

If you have taken Tequin, it may be advisable to seek both medical attention, to protect your health, and legal counseling, to protect your rights. Please keep in mind that there may be time limits within which you must commence suit.


  • Fluoroquinolone-Induced Renal Failure
    Fluoroquinolones are generally well tolerated, clinically useful antimicrobials. This paper highlights rare, but potentially serious, adverse effects involving the kidney.
  • Antibiotic linked to blood-sugar problems
    After providing more information on risk of taking the medication by adding a stronger warning label, Bristol-Myers Squibb confirmed plans to stop producing and selling the prescription drug Tequin, which has been linked to blood-sugar complications. »Read more
  • Study: Tequin Tied to Blood-Sugar Problems
    Dr. Jerry H. Gurwitz of the Meyers Primary Care Institute in Worcester, Massachusetts says there are safer, just as effective alternatives to the antibiotic Tequin.  Tequin, which is said to increase a person's risk of low and high blood sugar, is now stated to carry stronger warnings about the blood-sugar problems. 
  • Stronger Warnings for Tequin
    Bristol-Myers Squibb Co. announced labeling changes for the prescription Tequin, which has been connected to serious reports of hypoglycemia, low blood sugar, and hyperglycemia, high blood pressure.  The label enhances the warning section and includes information on recognizing other risk factors. »Read more
  • Tequin: Most important fact about this drug
    Read about why this drug is prescribed, side effects/warnings and other important facts. »Read more
  • Bristol-Myers to stop sale, manufacture of antibiotic Tequin
    Pharmaceutical company Bristol-Myers Squibb Co (BMY.NYS) Friday announced that it plans to stop manufacturing and selling its antibiotic, Tequin. The drug was approved in 1999. »Read more
  • Public Citizen: Petition to the FDA to Immediately Ban the Antibiotic Gatifloxacin (Tequin)
    According to Public Citizen’s analysis of adverse events reported to the FDA, 388 patients had dangerously low or high blood sugar as a result of taking Tequin between Jan. 1, 2000, and June 30, 2005. Of those, 20 people died and 159 were hospitalized. »Read more
  • Public Citizen Calls on FDA to Ban Antibiotic Tequin
    Public Citizen today petitioned the U.S. Food and Drug Administration (FDA) to ban the antibiotic Tequin (gatifloxacin) because it is linked to blood sugar abnormalities and has caused deaths and hospitalizations. »Read more
  • Troublesome Tequin coming off market
    Spokesman Eric Miller said the company will return rights to the drug to Kyorin Pharmaceutical Company in Japan. He said the company acted after an evaluation of the product as well as ongoing transition in the company's focus. 
  • Antibiotic Tequin to Disappear Soon
    The manufacturer has said it should not be used by diabetics, and that the elderly and those with kidney disease are more likely to have problems. 
  • Tequin associated with hypoglycemia and hyperglycemia
    The FDA ( U.S. Food and Drug Administration ) has changed labeling for Tequin ( Gatifloxacin ), an antibiotic indicated for the treatment of patients with pneumonia, bronchitis, uncomplicated gonorrhea, and various infections including infections of urinary tract, kidneys, and skin. 

What Is Tequin?

Tequin is an antibiotic used to treat adults with lung, sinus, or urinary tract infections and also to treat certain sexually transmitted diseases caused by germs called bacteria. Sometimes viruses, rather than bacteria, may infect the lungs and sinuses (for example, the common cold). Tequin, like all other antibiotics, does not kill viruses.

The sexually transmitted disease called gonorrhea is treated by Tequin. Other sexually transmitted diseases including syphilis and non-gonococcal diseases are not treated by Tequin.

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Who Should Not Take Tequin?

You should not take Tequin if you:

  • Are allergic to Tequin or any “quinolones” such as:
       Ciprofloxacin (CIPRO)
       Gatifloxacin (TEQUIN, ZYMAR)
       Levofloxacin (LEVAQUIN)
       Lomefloxacin (MAXAQUIN)
       Moxifloxacin (AVELOX, VIGAMOX)
       Gemifloxacin (FACTIVE)
       Norfloxacin (NOROXIN)
       Ofloxacin (FLOXIN)
  • Have a rare heart condition called congenital prolongation of the QTc interval. If any of your family members have this condition, tell your healthcare professional.
  • Have low blood potassium (hypokalemia). Low blood potassium may be caused by medicines called diuretics or “water pills.”
  • Are taking medicines to treat an irregular heartbeat.
  • Have diabetes or high blood sugar.
  • If you are pregnant or nursing, talk to your healthcare professional before taking.

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What Are the Risks of Tequin?

The following are the major potential risks and side effects of Tequin therapy. However, this list is not complete.

If you have any of the following side effects, stop taking Tequin and call your doctor:

  • serious blood sugar changes including low blood sugar (hypoglycemia) or high blood sugar (hyperglycemia).  See FDA Alert.
  • severe allergic reactions (trouble breathing; closing of the throat, swelling of the lips, tongue, or face, or hives)
  • central nervous system (CNS) side effects including: seizures, dizziness, confusion, tremors, hallucinations, depression, or suicidal thoughts
  • pain, inflammation, or rupture of a tendon

Some common side effects that may occur with Tequin include:

  • Nausea
  • Vomiting
  • Stomach pain
  • Diarrhea
  • Dizziness
  • Headache
  • Abnormal blood sugar level, too low or too high

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What Should I Tell My Healthcare Professional?

Before you start taking Tequin, tell your healthcare professional if you:

  • are trying to become pregnant, are already pregnant, or are breast-feeding. The effects on the unborn child and nursing infant are unknown.
  • have diabetes
  • have heart problems
  • have or had liver problems
  • have kidney problems

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Can Other Medicines Or Food Affect Tequin?

Tequin and certain other medicines can interact with each other. Tell your healthcare professional about all the medicines you take including prescription and non-prescription medicines, vitamins, and herbal supplements. Know the medicines you take. Keep a list of them with you to show your healthcare professional.

Especially tell your healthcare professional if you take:

  • medicine to control blood sugar (insulin, glyburide, other hypoglycemic drugs) or steroids
  • medicines to treat an irregular heartbeat
  • cisapride, erythromycin, antidepressant medicines, or antipsychotic medicines. These medicines may increase the chance of heart beat problems when taken with Tequin.
  • medicines called diuretics or ‘water pills” because they can sometimes cause low blood potassium
  • diabetes medicines
  • Videx (didanosine): Tequin should be taken 4 hours before your dose of Videx.
  • antacids and multivitamins that contain zinc, magnesium, or iron. These may stop Tequin from passing into your body. Take Tequin 4 hours before taking any of these products.

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What Else Should I Know about Tequin?     

  • Do not drive or operate dangerous machines until you know how Tequin affects you. Tequin can cause dizziness.
  • Avoid long exposure to sunlight. Tequin may make your skin more sensitive to sunlight.  You may get severe sunburn. Call your healthcare professional if you have severe burning, redness, itching, rash, or swelling after being in the sun while taking Tequin.
  • Tequin for Oral Suspension contains phenylalanine.   This is important to know if you have a condition called Phenylketonuria.

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