Active Ingredient

Doxycycline

Doxycycline is an antibiotic belonging to the tetracycline class. It is commonly used to treat a variety of bacterial infections.

This medication can help manage infections in different parts of the body and is sometimes used for conditions caused by bacteria.

Written By Douglas C. Goldberg, MD

Reviewed By Philip Schein, MD

Last Updated 28 Nov 2025

Available Doxycycline Brands

Vibramycin

Strengths 100 mg

Doxt-SL

Strengths 100mg

Doxycycline Uses

Doxycycline is used to treat a range of bacterial infections. It works by stopping the growth of bacteria.

Respiratory tract infections
Urinary tract infections
Skin infections
Acne
Sexually transmitted infections

How Doxycycline Works

Doxycycline works by inhibiting the protein synthesis of bacteria, which stops their growth and replication.

It targets the bacterial ribosome, making it difficult for bacteria to produce proteins necessary for their survival.

This action helps the body’s immune system to eliminate the bacteria more effectively.

Common side effects of Doxycycline

Not everyone experiences side effects from Doxycycline, and many are mild and temporary.

Nausea
Diarrhea
Upset stomach
Sun sensitivity
Headache
Dizziness

If you experience serious or persistent side effects, contact your doctor.

Frequently Asked Questions

What is Doxycycline used for?

Doxycycline is used to treat various bacterial infections, including respiratory, urinary, and skin infections.

How long does it take for Doxycycline to work?

The effect of Doxycycline may start within a few days, but it is important to complete the full course as prescribed by your doctor.

Can I drink alcohol while taking Doxycycline?

It is advisable to avoid alcohol while taking Doxycycline, as it may increase the risk of side effects.

Is Doxycycline safe for everyone?

Doxycycline is generally safe for most people, but it may not be suitable for those with certain conditions. Always consult your doctor before starting any new medication.

Can Doxycycline cause sun sensitivity?

Yes, Doxycycline can make your skin more sensitive to sunlight. It is important to use sunscreen and avoid prolonged sun exposure.