Asthma is a chronic condition that affects about
It’s not clear what causes asthma. Some factors that might contribute to its development include:
Researchers are continuing to examine whether antibiotics may help treat asthma symptoms. Keep reading to learn how antibiotics work and what researchers have found so far.
Antibiotics are medications that kill and inhibit the growth of bacteria. The discovery of antibiotics revolutionized modern medicine. In the little over 100 years since antibiotics were first discovered, the human life span has increased by 23 years.
Antibiotics aren’t effective at treating viral, fungal, or parasitic infections. Research suggests bacterial infections play a minor role in flare-ups of asthma, while viral infections play a major role.
Doctors try to avoid prescribing unnecessary antibiotics because they can cause side effects and contribute to antibiotic resistance. Antibiotic resistance is when drugs designed to kill certain strands of bacteria stop being effective.
According to the
Short-term worsening of asthma symptoms is referred to as an asthma attack, flare-up, or exacerbation. Theoretically, antibiotics could help kill bacteria that contribute to asthma flare-ups. But bacterial infections seem to make up a small percentage of flare-ups.
The risks of doctors overprescribing antibiotics for asthma may outweigh the benefits in many cases. And researchers haven’t found enough evidence to justify prescribing antibiotics outside of specific situations, such as a confirmed bacterial infection.
In a 2017 study that examined medical files from 100 hospitalized women, researchers found that respiratory infections caused almost three-quarters of asthma flare-ups.
Antibiotics were prescribed to about half of these women, but only 7% of them tested positive for bacterial infections. Women prescribed antibiotics stayed in the hospital an average of 2.35 days longer, but both groups of women had good outcomes.
Likewise, in a large
Researchers found a limited amount of evidence that antibiotics given in the time of a flare-up may lead to more symptom-free days, but findings were inconsistent across studies. Researchers had low confidence in the results.
When are antibiotics recommended?
Antibiotics may help asthma symptoms in people with a confirmed bacterial respiratory infection. Types of bacteria linked to asthma flare-ups include:
- Mycoplasma pneumoniae
- Haemophilus influenzae
- Streptococcus pneumoniae
- Chlamydia pneumoniae
- Moraxella catarrhalis
- Global Initiative for Asthma
- European Respiratory Society/American Thoracic Society
- British Thoracic Society
Exposure to antibiotics early in life, especially antibiotics to treat respiratory infections, may lead to an increased risk of asthma later in life.
- Quick-relief medications: Quick-relief medications are usually administered through an inhaler and only used to treat asthma attacks. They include short-acting, rapid-onset beta2-agonists and anticholinergic bronchodilators.
- Controller medications: These medications are used to correct long-term swelling and excess mucus in your airways. They include anti-inflammatories, anticholinergics, and long-acting bronchodilators.
- Combination of quick-relief and controller medications: These medications provide short- and long-term relief of asthma symptoms. However, they haven’t yet been approved by the Food and Drug Administration (FDA) for this purpose.
- Biologics: Doctors may prescribe biologics when other treatments aren’t working or to control a particular trigger. These medications reduce inflammation by targeting proteins made in your immune system called antibodies.
Most medical guidelines don’t recommend antibiotics for treating asthma except when asthma doesn’t respond to other treatments or lab test results confirm a bacterial infection.
Respiratory infections are a common trigger for asthma flare-ups, but viruses seem to cause most infections. Unnecessary use of antibiotics can contribute to antibiotic resistance and cause side effects.