When taken as prescribed, antibiotics are generally well tolerated. They can, however, still cause some side effects.
Different antibiotics will have different side effects. Generally, the most common side effects of antibiotics include
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Abdominal pain and discomfort
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Vomiting
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Dizziness
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Photosensitivity (more common with tetracyclines)
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Fungal infections: Because antibiotics kill off protective bacteria in your body, they can allow certain fungal infections to form, including thrush and vaginal yeast infections.
Speak to one of our convenient online doctors about treatment if you develop these symptoms.
In rare cases, antibiotics may cause serious side effects, including those of a severe allergic reaction. These symptoms include:
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A fast heartbeat
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Wheezing
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Difficulty breathing
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Feeling lightheaded or faint
If you experience any of these side effects or other life-threatening symptoms, seek emergency medical attention immediately.
One of the main reasons to avoid overusing or misusing antibiotics is that doing so can lead to something called “antibiotic resistance” across the globe.1 Bacteria can replicate at an alarming rate when you have an infection, sometimes as quickly as every five minutes! These bacteria evolve over time because some of them replicate with mistakes, which allow the bacteria to fight off an antibiotic. These bacteria survive and then multiply with that new ability.
It’s important to only take antibiotics when you have a bacterial infection. Your doctor can help guide you in making a decision on whether or not an antibiotic is right for you.
The following conditions and substances may interfere with the efficacy of antibiotics or cause further complications:
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Alcohol
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Grapefruit juice
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Excess calcium, sugars, or yeasts
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Being pregnant or breastfeeding
Many antibiotics are safe for pregnant women, but some can be harmful, so tell your doctor if you're pregnant.
Some antibiotics may affect the effectiveness of other medications you are taking. For example, the antibiotic rifampin can affect the birth control pill's effectiveness. This is the only antibiotic known to reduce the effect of birth control pills, usually prescribed for tuberculosis. Aside from rifampin, you should not have any problems taking an antibiotic while on birth control.