Active Ingredient

Theophylline

Theophylline is a medication that belongs to the xanthine class of drugs. It is commonly used to help manage and treat respiratory conditions.

This drug works by relaxing the muscles in the airways, making it easier to breathe.

Written By Douglas C. Goldberg, MD

Reviewed By Philip Schein, MD

Last Updated 28 Nov 2025

Available Theophylline Brands

Quibron-T

Strengths 200 mg, 400mg

Theo-24 Cr

Strengths 400mg

Theophylline Uses

Theophylline is typically prescribed for respiratory issues. It can be beneficial for:

Asthma
Chronic obstructive pulmonary disease (COPD)
Chronic bronchitis
Emphysema

How Theophylline Works

Theophylline works by relaxing the muscles in the lungs and chest, which helps open up the airways. This action makes breathing easier for individuals with respiratory conditions.

As a xanthine derivative, it also reduces inflammation and decreases the response of the airways to irritants.

This dual action helps improve airflow and reduces symptoms like wheezing and shortness of breath.

Common side effects of Theophylline

Not everyone will experience side effects from Theophylline, and many side effects are mild and temporary. Common side effects include:

Nausea
Headache
Insomnia
Stomach upset
Dizziness
Increased heart rate

If you experience serious or persistent symptoms, it is important to contact a healthcare professional.

Monitor your symptoms and report any significant changes to your healthcare provider.
Avoid consuming large amounts of caffeine while taking this medication.
Do not mix Theophylline with alcohol, as it may increase side effects.
Inform your doctor of all medications you are taking to avoid potential interactions.
Do not use Theophylline if you experience severe or unexplained symptoms, and seek medical advice promptly.

Always consult with your doctor for personalized medical advice and before making any changes to your treatment plan.

Frequently Asked Questions

What does Theophylline do?

Theophylline helps open up the airways in your lungs, making it easier to breathe.

How long does it take for Theophylline to work?

The onset of action can vary, but it generally starts to work within a few hours.

How long do the effects of Theophylline last?

The effects of Theophylline can last several hours, but this can vary based on the individual.

Is Theophylline safe for everyone?

Theophylline is not suitable for everyone. Discuss your medical history with your doctor to ensure it is safe for you.

Can Theophylline interact with other medications?

Yes, Theophylline can interact with other medications. Always inform your healthcare provider about all the medicines you are taking.