[07-10-2018 ] The Food and Drug Administration (FDA) is strengthening the current warnings in the prescribing information that fluoroquinolone antibiotics may cause significant decreases in blood sugar and certain mental health side effects. The low blood sugar levels can result in serious problems, including coma, particularly in older people and patients with diabetes who are taking medicines to reduce blood sugar. We are making these changes because our recent review found reports of life-threatening low blood sugar side effects and reports of additional mental health side effects. Show We are requiring these updates in the drug labels and to the patient Medication Guides for the entire class of fluoroquinolones (see List of FDA-Approved Fluoroquinolones for Systemic Use). This affects only the fluoroquinolone formulations taken by mouth or given by injection. Blood sugar disturbances, including high blood sugar and low blood sugar, are already included as a warning in most fluoroquinolone drug labels; however, we are adding that low blood sugar levels, also called hypoglycemia, can lead to coma. Across the fluoroquinolone antibiotic class, a range of mental health side effects are already described under Central Nervous System Effects in the Warnings and Precautions section of the drug label, which differed by individual drug. The new label changes will make the mental health side effects more prominent and more consistent across the systemic fluoroquinolone drug class. The mental health side effects to be added to or updated across all the fluoroquinolones are disturbances in attention, disorientation, agitation, nervousness, memory impairment, and serious disturbances in mental abilities called delirium. Fluoroquinolone antibiotics are approved to treat certain serious bacterial infections, and have been used for more than 30 years. They work by killing or stopping the growth of bacteria that can cause illness. Without treatment, some infections can spread and lead to serious health problems (see List of Currently Available FDA-Approved Fluoroquinolones for Systemic Use). Patients should tell your health care professionals if you are taking a diabetes medicine when your health care professional is considering prescribing an antibiotic, and also if you have low blood sugar or symptoms of it while taking a fluoroquinolone. For patients with diabetes, your health care professional may ask you to check your blood sugar more often while taking a fluoroquinolone. Early signs and symptoms of low blood sugar include:
Discuss with your health care professional how to treat yourself if you suspect low blood sugar. Symptoms of low blood sugar can progress and become life-threatening, so seek help immediately by calling 911 or going to an emergency room if you experience more serious symptoms, including confusion, inability to complete routine tasks, blurred vision, seizures, or loss of consciousness. Patients should also tell your health care professional immediately if you notice any changes in your mood, behavior, or thinking. Read the patient Medication Guide you receive with your fluoroquinolone antibiotic prescription, which explains the benefits and risks of the medicine. Health care professionals should be aware of the potential risk of hypoglycemia sometimes resulting in coma, occurring more frequently in the elderly and those with diabetes taking an oral hypoglycemic medicine or insulin. Alert patients of the symptoms of hypoglycemia and carefully monitor blood glucose levels in these patients, and discuss with them how to treat themselves if they have symptoms of hypoglycemia. Inform patients about the risk of psychiatric adverse reactions that can occur after just one dose. Stop fluoroquinolone treatment immediately if a patient reports any central nervous system side effects, including psychiatric adverse reactions, or blood glucose disturbances and switch to a non-fluoroquinolone antibiotic if possible. Stop fluoroquinolone treatment immediately if a patient reports serious side effects involving the tendons, muscles, joints, or nerves, and switch to a non-fluoroquinolone antibiotic to complete the patient’s treatment course. Health care professionals should not prescribe fluoroquinolones to patients who have other treatment options for acute bacterial sinusitis (ABS), acute bacterial exacerbation of chronic bronchitis (ABECB), and uncomplicated urinary tract infections (uUTI) because the risks outweigh the benefits in these patients. FDA continues to monitor and evaluate the safety and effectiveness of medicines after we approve them and they go on the market. In the case of fluoroquinolones, we reviewed reports of cases submitted to FDA* and the published medical literature of apparently healthy patients who experienced serious changes in mood, behavior, and blood sugar levels while being treated with systemic fluoroquinolones (see Data Summary for information on the names of fluoroquinolones and numbers of reports). Some of the mental health side effects are already listed in some of the labels and some events are listed using similar terms, but not all fluoroquinolone labels provided this information. As a result, we are requiring several changes to the Warnings and Precautions section in the fluoroquinolones drug labels. Details will be added describing hypoglycemic coma, and the new subheading “Psychiatric Adverse Reactions” found under “Central Nervous System Effects” will help clarify and identify the mental health side effects. We previously communicated about other safety issues associated with fluoroquinolones in May 2016 (restricting use for certain uncomplicated infections), July 2016 (disabling side effects), August 2013 (peripheral neuropathy), and July 2008 (tendinitis and tendon rupture). We urge patients and health care professionals to report side effects involving fluoroquinolones or other drugs to the FDA MedWatch program, using the information in the “Contact FDA” box at the bottom of the page. *The cases were reported to the FDA Adverse Event Reporting System (FAERS). What causes sudden drop in blood sugar?Causes of Low Blood Sugar
Taking too much insulin. Not eating enough carbs for how much insulin you take. Timing of when you take your insulin. The amount and timing of physical activity.
Which drug has the highest risk of hypoglycemia?Patients on sulfonylureas and meglitinides have the highest incidence of hypoglycemia because of their pharmacological action of increasing insulin secretion. Of the sulfonylureas, glyburide presents the highest risk of hypoglycemia.
What besides diabetes causes low blood sugar?Possible causes without diabetes
drinking alcohol. taking certain medications, including some antibiotics and medications for malaria or pneumonia. kidney problems. problems with your adrenal or pituitary gland.
What causes low blood sugar without diabetes treatment?A low blood sugar level without diabetes
A low blood sugar level is uncommon in people who do not have diabetes. Possible causes include: your body releasing too much insulin after eating (called reactive hypoglycaemia or postprandial hypoglycaemia) not eating (fasting) or malnutrition.
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