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Last updated on Aug 12, 2025.
Doxycycline is an oral antibiotic that treats any underlying bacterial cause of inflamed or infected hair follicles. It also has anti-inflammatory effects, so it can reduce redness, swelling, and the chance of scarring.[1]
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Doxycycline is a broad-spectrum antibiotic. It’s used to treat a range of bacterial infections, including skin conditions like folliculitis.
It’s commonly used in dermatology because it targets bacteria while helping to calm the immune system, which helps to reduce redness and swelling. Because of this, it can be prescribed when topical treatments haven’t worked or when folliculitis is widespread, painful, or recurring.[1]
Doxycycline works for folliculitis in two ways. Firstly, it makes it difficult for bacteria to multiply, which helps to stop the growth of bacteria that could be causing the infection.
At the same time, it reduces the amount of key inflammatory chemicals in your body, even at low doses.[2][3] These anti-inflammatory properties help with pain, swelling, and skin irritation, even if bacteria isn’t the main cause.
Like all medications, some side effects can happen, but they won’t necessarily happen to everyone. The most common are nausea, diarrhea, and feeling tired.
Doxycycline can also irritate your throat and stomach if it’s taken right before bed, or without water.
It can also make your skin very sensitive to the sun.
If you feel very tired or unwell while taking it, or if you have a rash, stomach pain or problems with vision, stop taking it and contact a doctor.
Doxycycline is available in several strengths, usually as 50mg, 75mg, 100mg, or 150mg capsules or tablets. For folliculitis, the most common dose is 100mg once or twice a day.

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Take doxycycline with a full glass of water, and stay upright for at least 30 minutes after to avoid irritating your throat. You can take it with or without food – but if doxycycline upsets your stomach, it’s better to take it with food.
It’s best to take it at the same time each day. If you miss a dose, take it as soon as you remember. If it’s nearly time for your next dose, skip it. Don’t take an extra tablet to make up for a missed one.
If you accidentally take an extra dose of doxycycline, it’s unlikely to cause you any harm. But if you feel unwell or experience severe nausea, dizziness, or vision problems, contact your doctor or a medical service.

How we source info.
When we present you with stats, data, opinion or a consensus, we’ll tell you where this came from. And we’ll only present data as clinically reliable if it’s come from a reputable source, such as a state or government-funded health body, a peer-reviewed medical journal, or a recognised analytics or data body. Read more in our editorial policy.
Doxycycline isn’t suitable for everyone, and there are some things that you need to be aware of when taking it.
Here’s all the official info on it. If anything is unclear, let our doctor know, and they can talk with you about it.
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Last updated on Aug 12, 2025.
Our experts continually monitor new findings in health and medicine, and we update our articles when new info becomes available.
Aug 12, 2025
Published by: The Treated Content Team. Medically reviewed by: Dr Alexandra Cristina Cowell, Writer & Clinical Content ReviewerHow we source info.
When we present you with stats, data, opinion or a consensus, we’ll tell you where this came from. And we’ll only present data as clinically reliable if it’s come from a reputable source, such as a state or government-funded health body, a peer-reviewed medical journal, or a recognised analytics or data body. Read more in our editorial policy.
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Writer & Clinical Content Reviewer
Cristina writes content for Treated, and reviews content produced by our other writers to make sure it’s clinically accurate.
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