Doxycycline treats infections caused by bacteria—not viruses like colds or the flu. It’s often used for:
Acne
Respiratory infections (like bronchitis or pneumonia)
Skin infections
Certain sexually transmitted infections
Tick-borne illnesses (such as Lyme disease)
Malaria prevention (in some cases)
Because it works against many types of bacteria, it’s a go-to option for many doctors.
How Does It Work?
Doxycycline stops bacteria from making the proteins they need to grow and survive. When the bacteria can’t grow, your immune system can more easily clear the infection.
How Is It Taken?
Doxycycline usually comes as a capsule or tablet taken by mouth. It’s often taken once or twice a day.
Helpful tips:
Take it with a full glass of water.
Don’t lie down right after taking it—this helps prevent throat irritation.
Avoid taking it with milk or antacids unless your doctor says it’s okay.
Possible Side Effects
Like all medicines, doxycycline can cause side effects, though many people tolerate it well. Common ones include:
Upset stomach or nausea
Sensitivity to sunlight (sunburn happens more easily)
Mild diarrhea
If you notice severe symptoms—like trouble swallowing, a rash, or allergic reactions—contact a healthcare provider right away.
Important Things to Know
Always finish the full course, even if you feel better.
Use sunscreen and protective clothing while taking it.
It’s not usually recommended during pregnancy or for young children unless specifically advised by a doctor.
Final Thoughts
Doxycycline is a reliable and widely used antibiotic that helps treat many bacterial infections. When taken correctly and as prescribed, it’s a safe and effective tool for fighting illness.