Doxofylline 400 mg Uses, Dosage, Side Effects & How to Take

Sep 04, 2025

Breathing difficulties caused by chronic respiratory conditions like asthma and chronic obstructive pulmonary disease (COPD) can significantly affect quality of life. That’s where doxofylline 400 mg tablets, such as DX PHYLLIN 400 by Steris Healthcare, come in to offer effective, long-lasting relief.

Doxofylline 400 mg is a modern bronchodilator that helps open the airways, reduce inflammation, and improve oxygen flow to the lungs—without the harsh side effects associated with older respiratory medications like theophylline.

Whether you’re managing chronic symptoms or preventing flare-ups, DX PHYLLIN 400 is a trusted solution for better respiratory health.

What is Doxofylline 400 mg?

Doxofylline 400 mg is a methylxanthine derivative used to treat asthma, COPD, and other chronic lung diseases. It works as a bronchodilator, meaning it helps to relax the muscles in your airways and makes breathing easier.

Unlike theophylline, doxofylline has a safer side-effect profile and fewer drug interactions, making it suitable for long-term use in adults under medical supervision.

Doxofylline Tablet Uses

The primary doxofylline 400 mg uses include:

  • Treatment of bronchial asthma

  • Management of COPD (Chronic Obstructive Pulmonary Disease)

  • Supportive therapy for other lung diseases involving airway inflammation or narrowing

  • Improved airflow and reduced breathlessness in patients with chronic respiratory illness

DX PHYLLIN 400 offers consistent therapeutic benefits, especially when combined with inhalers or other prescribed respiratory medications.

How Does Doxofylline Work?

Doxofylline works by:

  • Relaxing bronchial smooth muscles, allowing the airways to widen

  • Improving airflow to and from the lungs

  • Reducing inflammation in the respiratory tract

  • Enhancing oxygen exchange and overall lung function

Because of its selective action and lack of significant stimulation on the heart or central nervous system, doxofylline 400 is considered safer than traditional methylxanthines.

Doxofylline Dose for Adults

The typical doxofylline dose for adults is:

  • One 400 mg tablet, taken once or twice daily, preferably after meals

The exact dosage may vary based on:

  • Patient’s age and weight

  • Severity of the respiratory condition

  • Other medications being used

Always follow your doctor's instructions for best results and safety.

How to Take Doxofylline 400 mg?

Here’s how to safely use doxofylline 400 mg tablets:

  1. Swallow the tablet whole with a glass of water

  2. Take after meals to reduce the risk of stomach upset

  3. Do not crush or chew the tablet

  4. Stick to the same time each day to maintain consistent levels in the body

  5. Avoid alcohol and smoking while on the medication.

If you miss a dose, take it as soon as you remember. If it’s close to your next dose, skip the missed dose—do not double up.

Doxofylline Side Effects

Doxofylline 400 mg is generally well-tolerated, but some patients may experience:

  • Nausea or stomach upset

  • Headache

  • Insomnia or restlessness

  • Mild palpitations

  • Rarely, allergic reactions

Contact your doctor immediately if you experience severe dizziness, chest pain, or breathing difficulty.

Why Choose DX PHYLLIN 400 from Steris Healthcare?

Steris Healthcare is a name trusted by doctors and patients alike for high-quality, effective, and safe medications.

Here’s why DX PHYLLIN 400 is the right choice:

  • Manufactured in WHO-GMP certified facilities

  • High-purity doxofylline 400 mg for reliable efficacy

  • Minimal side effects

  • Backed by scientific research and quality testing

  • Recommended by healthcare professionals for long-term respiratory care

When you choose DX PHYLLIN 400, you choose a commitment to better breathing, better living, and trusted pharmaceutical excellence.

Frequently Asked Questions

Q1: What is doxofylline 400 mg used for?

It is used to treat asthma, COPD, and other chronic respiratory conditions by relaxing airway muscles and improving breathing.

Q2: How to take doxofylline 400 mg?

Take one tablet once or twice daily after meals, exactly as prescribed by your doctor. Do not crush or break the tablet.

Q3: Can doxofylline be used long term?

Yes. Under a doctor’s supervision, doxofylline is suitable for long-term management of chronic respiratory illnesses.

Q4: Is doxofylline safe compared to theophylline?

Yes, doxofylline is safer than theophylline. It has fewer side effects, less risk of drug interactions, and no significant stimulation of the heart or central nervous system.

Q5: Can I take doxofylline with inhalers?

Yes, doxofylline 400 mg is often prescribed alongside inhalers for better symptom control. Always follow your doctor’s advice.

Precautions for Patients

  • Do not self-medicate or adjust your dose without consulting your doctor

  • Avoid alcohol and tobacco—they can interfere with breathing and medication effectiveness

  • Inform your doctor about all other medicines you’re taking

  • Get regular lung function tests as advised

  • Keep hydrated and maintain a healthy lifestyle for better lung function

Final Thoughts

Doxofylline 400 mg is a trusted solution for those struggling with obstructive airway diseases. With fewer side effects and proven effectiveness, DX PHYLLIN 400 from Steris Healthcare provides patients confidence in their treatment.

If you or a family member have been prescribed doxofylline, make sure you purchase it from a reliable source like Steris Healthcare to ensure product quality and efficacy.

Take control of your respiratory health today. Consult your healthcare professional about starting or continuing doxofylline 400 mg therapy, and trust Steris Healthcare for your medication needs!

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