Active Ingredient

Tetracycline

Tetracycline is an antibiotic used to treat a variety of bacterial infections. It belongs to a group of medications known as tetracycline antibiotics.

This medication is effective against a wide range of bacteria and is commonly used when other antibiotics may not be suitable.

Written By Douglas C. Goldberg, MD

Reviewed By Philip Schein, MD

Last Updated 28 Nov 2025

Available Tetracycline Brands

Terramycin

Strengths 250mg

Tetracycline

Strengths 250mg, 500mg

Panmycin

Strengths 250mg, 500mg

Sumycin

Strengths 250mg, 500mg

Tetracycline Uses

Tetracycline is used to treat several types of bacterial infections.

Respiratory tract infections
Urinary tract infections
Skin infections, including acne
Gastrointestinal infections
Sexually transmitted infections

How Tetracycline Works

Tetracycline works by inhibiting the growth of bacteria. It does this by interfering with the ability of bacteria to produce essential proteins needed for their survival.

By stopping the bacteria from multiplying, it helps the body’s immune system to fight off the infection more effectively.

Common side effects of Tetracycline

Not everyone experiences side effects with tetracycline, and many are mild and temporary.

Nausea
Vomiting
Diarrhea
Loss of appetite
Stomach upset
Headache

If you experience serious or persistent symptoms, contact your doctor.

Avoid taking tetracycline with dairy products as they can reduce its effectiveness.
Do not lie down immediately after taking this medication to prevent irritation of the esophagus.
Limit sun exposure, as tetracycline can make your skin more sensitive to sunlight.
Inform your doctor of any other medications you are taking to avoid potential interactions.
Do not use tetracycline if you have severe kidney or liver problems without consulting your doctor.

Always consult your doctor or healthcare provider if you have any concerns or questions about using tetracycline.

Frequently Asked Questions

What does tetracycline treat?

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

How long does it take for tetracycline to work?

The effects of tetracycline can vary, but improvement in symptoms is often noticed within a few days. It’s important to complete the entire course as prescribed.

Can I consume alcohol while taking tetracycline?

It’s advisable to limit alcohol consumption while taking tetracycline to avoid potential side effects and interactions.

Is tetracycline safe for everyone?

Tetracycline is not suitable for everyone, including pregnant women and young children. Always consult your doctor before starting the medication.

Can tetracycline interact with other medications?

Yes, tetracycline can interact with other medications. Inform your doctor about all the medications you are taking to avoid interactions.