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Theophylline ER Tablets | Asthma & COPD Maintenance
Theophylline prices from $98.90
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What is Theophylline?
Theophylline is a prescription extended-release tablet used for the long-term management and prevention of asthma symptoms and other chronic lung conditions linked to reversible airway narrowing. It belongs to a group of medicines called methylxanthines, which help support easier breathing over time. Theophylline is not intended to replace a rescue inhaler or treat sudden breathing problems.
Your provider may prescribe Theophylline as part of an ongoing asthma treatment plan based on your symptoms, medical history, and response to treatment. Because the way the body processes theophylline can vary from person to person, treatment may need to be individualized.
How do I take Theophylline?
Theophylline extended-release tablets are typically taken by mouth on a regular schedule exactly as prescribed by your provider. The medicine is designed to work over time to help support ongoing airway control, rather than immediate symptom relief. Your provider may adjust your treatment based on how your body responds and whether other health conditions or medications could affect theophylline levels.
- Take only as prescribed by your healthcare provider
- Intended for ongoing maintenance treatment, not quick relief
What are the possible side effects?
Like all prescription medicines, Theophylline can cause side effects. Some people may experience mild stimulant-like effects similar to caffeine, especially if the medicine level becomes too high. Common side effects may include nausea, headache, trouble sleeping, restlessness, or stomach discomfort.
More serious reactions can happen in some cases and may require urgent medical attention. Contact your provider right away or seek emergency care if you develop severe vomiting, seizures, irregular heartbeat, chest symptoms, or worsening side effects that do not improve.
- Common side effects may include nausea, headache, or insomnia
- Some people may notice nervousness, shakiness, or irritability
- Serious side effects can include seizures or abnormal heart rhythm
- Risk of toxicity may increase with certain medications or illnesses
- Contact a provider if side effects feel severe or unusual
For detailed Information refer to the Important Safety / Prescribin Information.
*Prescription products require an online consultation with a licensed healthcare provider who will determine if treatment is appropriate. Individual results may vary.
PRODUCT Prices New
Theophylline tablet prices
Quantity
Price
Theophylline 100 mg
Save $7.00
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$4.13 a gm
Theophylline 200 mg
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Currently not available
$4.13 a gm
Theophylline 300 mg
Save $10
$98.90
$108.90-
Theophylline 400 mg
Save $10
$128.60
$138.60
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*Prescription products require an online consultation with a licensed healthcare provider who will determine if treatment is appropriate. Images are for Illustration purposes only. Actual product and packaging may differ.
Topics
Is Theophylline used for everyday asthma control or sudden breathing attacks?
Theophylline extended-release tablets are used for long-term asthma management and prevention of ongoing breathing symptoms. Because the medication releases slowly over time, it’s meant for scheduled daily treatment — not fast relief during a sudden asthma attack.
If you have sudden wheezing, chest tightness, or trouble breathing, follow your provider’s emergency instructions and use your rescue medication if prescribed.
- Designed for ongoing asthma symptom control
- Extended-release tablets work gradually over time
- Not intended for emergency breathing symptoms
- Often used as part of a broader asthma treatment plan
Who may be prescribed Theophylline?
Theophylline may be prescribed for adults who need long-term treatment for asthma symptoms or reversible airway narrowing linked to chronic lung conditions. Your provider will review your medical history, medications, and possible risk factors before prescribing treatment.
Because the body processes theophylline differently from person to person, some patients may need closer follow-up during treatment.
- Prescription treatment for ongoing asthma management
- Treatment is individualized based on your health profile
- Smoking habits and other medications may affect treatment
- Tell your provider about heart, seizure, or stomach conditions
How should I think about Theophylline as an extended-release tablet?
Theophylline ER tablets are designed to release medication slowly throughout the day. This helps support more consistent airway management over time instead of quick symptom relief.
It’s important to take the medication exactly as prescribed and avoid changing your dose without medical guidance.
- Extended-release tablets provide gradual medication delivery
- Usually taken on a regular daily schedule
- Not meant for immediate symptom relief
- Follow your provider’s instructions carefully
Why does my provider need to personalize my Theophylline dose?
Theophylline levels can change based on your age, health conditions, smoking status, and other medications. Because of this, treatment often needs to be adjusted individually.
Higher theophylline levels may increase the risk of side effects or toxicity, so your provider may recommend monitoring during treatment.
- The body processes theophylline differently over time
- Smoking changes can affect medication levels
What should I tell my provider before taking Theophylline?
Before starting Theophylline, tell your provider about your full medical history and all medications or supplements you take. Some conditions may increase the risk of side effects or affect how the medication works.
Your provider should also know if you recently stopped smoking or developed a fever or illness.
- Share all prescription and over-the-counter medications
- Mention seizure disorders, heart rhythm issues, or ulcers
- Tell your provider if you smoke or recently quit
- Report ongoing fever or serious illness
- Discuss pregnancy or breastfeeding questions with your provider
What medicines or habits can affect Theophylline?
Some medications and lifestyle habits can affect how much theophylline stays in your body. In some cases, this may increase side effects or change how well the medication works.
Smoking status is especially important because tobacco smoke can change the way the body processes theophylline.
- Certain antibiotics and seizure medications may interact
- Smoking changes can affect treatment levels
- Include vitamins, supplements, and herbal products in your review
Can food change how Theophylline is absorbed?
Food may affect how certain extended-release theophylline products are absorbed. High-fat meals, in particular, may change how much medication enters the bloodstream.
Your provider may give instructions based on the specific product prescribed to you.
- Some formulations may be taken with or without food
- High-fat meals may affect absorption
- Try to take your medication consistently
How should Theophylline be stored at home?
Store Theophylline exactly as directed on your prescription label. Keeping the medication stored properly may help maintain product quality and reduce the risk of accidental misuse.
Keep the tablets in a secure place away from heat, moisture, and children.
- Store at the recommended room temperature
- Keep tablets in their original container when possible
- Protect from excess heat and moisture
- Keep out of reach of children and pets
- Do not use expired medication
How does getting Theophylline through a prescription process work?
Theophylline is available by prescription only. Before treatment begins, a licensed provider may review your symptoms, medical history, and current medications to determine whether treatment is appropriate.
FAQ
Can I use Theophylline during an asthma attack?
No. Theophylline extended-release tablets are not designed for fast relief during a sudden asthma attack or severe breathing symptoms. The medication works gradually over time as part of a long-term asthma management plan.
If you develop sudden wheezing, chest tightness, or difficulty breathing, follow your provider’s emergency instructions and use your rescue medication if prescribed.
- Do not rely on Theophylline for emergency symptom relief
- Seek urgent medical care for severe breathing problems
What should I do if I miss a dose of Theophylline?
If you miss a dose, follow the instructions provided by your healthcare provider. Do not take extra medication or double your next dose unless you are specifically told to do so.
Because theophylline levels can affect side effect risk, taking too much medication too close together may increase the chance of serious reactions.
- Take your next dose as directed
- Avoid doubling doses to “catch up”
Can I take Theophylline with food?
Some Theophylline ER tablets may be taken with or without food, depending on the product prescribed. Your provider or pharmacist may recommend taking it consistently the same way each day.
Food can affect how some extended-release formulations are absorbed, especially high-fat meals.
- Follow the instructions provided with your prescription
- Try to take your medication consistently
Should I avoid high-fat meals when taking Theophylline?
High-fat meals may affect how certain extended-release theophylline products are absorbed. In some cases, this could change how much medication enters your bloodstream.
Your provider or pharmacist can help you understand the instructions for your specific prescription.
- Follow the dosing instructions provided with your medication
- Avoid changing your routine without guidance
Can I drink alcohol while taking Theophylline?
Alcohol may affect how some people respond to Theophylline and could increase certain side effects such as dizziness, stomach discomfort, or sleep changes.
If you regularly drink alcohol or notice unusual symptoms after drinking, talk with your healthcare provider about what may be appropriate for you.
- Avoid excessive alcohol use during treatment
- Monitor for unusual side effects
Can I drink coffee or energy drinks with Theophylline?
Theophylline may cause stimulant-like effects in some people. Drinks that contain caffeine, such as coffee or energy drinks, may increase feelings like jitteriness, nervousness, or trouble sleeping.
Some people may tolerate caffeine better than others during treatment.
- Watch for shakiness, restlessness, or sleep problems
- Consider limiting large amounts of caffeine
Can Theophylline make me feel jittery or keep me awake?
Yes. Some people taking Theophylline notice symptoms such as restlessness, shakiness, nervousness, or trouble sleeping. These effects may become more noticeable if medication levels become too high.
If these symptoms suddenly worsen or feel severe, contact your healthcare provider.
- Sleep changes and jitteriness can occur during treatment
- Avoid changing your dose without medical advice
- Talk with your provider if symptoms become bothersome
- Seek medical attention for severe or unusual reactions
When should I call a provider about side effects?
You should contact your provider if side effects become severe, do not improve, or feel unusual for you. Certain symptoms may require urgent medical attention.
Serious reactions linked to high theophylline levels can happen in some cases and should not be ignored.
- Contact your provider for worsening nausea or vomiting
- Seek urgent care for seizures or irregular heartbeat symptoms
- Report severe shakiness, confusion, or chest symptoms
Can I change my Theophylline dose if my breathing feels worse?
No. Do not increase or decrease your dose unless your provider tells you to. Changing your dose on your own may increase the risk of side effects or toxicity.
If your breathing symptoms worsen, contact your healthcare provider for medical guidance.
- Follow your prescribed dosing schedule carefully
- Do not take extra tablets during symptom flare-ups
- Seek emergency care for severe breathing symptoms
Do I need blood tests while taking Theophylline?
Some people may need blood testing during treatment to help providers monitor theophylline levels. This can help support safe dosing, especially when medications, smoking habits, or health conditions change.
Not everyone will need the same level of monitoring.
- Blood testing may be recommended during treatment
- Smoking changes can affect medication levels
- Certain illnesses or medications may require closer follow-up
- Follow your provider’s monitoring recommendations
What should I tell my provider if I recently stopped smoking?
Smoking can affect how quickly the body processes Theophylline. If you recently stopped smoking or changed your nicotine habits, tell your provider as soon as possible.
These changes may affect the amount of theophylline in your bloodstream.
- Tell your provider about smoking or vaping changes
- Do not adjust your dose on your own
- Watch for unusual side effects after quitting smoking
How should I store Theophylline ER tablets?
Store Theophylline ER tablets exactly as directed on the prescription label. Keeping the medication stored properly may help maintain product quality and safety.
Keep the medication away from excess heat, moisture, and direct sunlight.
- Store at recommended room temperature
- Keep tablets in their original container when possible
- Keep out of reach of children and pets
- Do not use expired medication
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References
Theophylline Extended-Release Tablets – Chronic management and prevention of asthma symptoms and reversible bronchospasm associated with chronic lung diseases. / Source: NCBI Link: DailyMed – Theophylline Extended-Release Tablets / Published: January 2024
H. Igde - MD
Clinical Expertise: Anesthesiology, Emergency Medicine, Urology, and Oncology
As a medical expert, Igde, MD has carefully reviewed the medical content on this page and confirmed that it is accurate and up to date with current medical knowledge.
For more information about the scope of the reviewed content and the role of our medical advisors, please visit our Medical Board page.
Last Update on 02/29/2026 | Next Information check will be on 08/29/2026
*All information presented on this page is for informational and educational purposes only and does not constitute medical advice, diagnosis, or treatment. Prescription products are available only after an online consultation with a licensed U.S. healthcare provider who determines if treatment is appropriate. Individual results may vary. US Quick Health LLC does not sell or ship medications directly. All prescriptions are fulfilled by licensed U.S. pharmacies.
Theophylline is a generic medication and may be manufactured by different pharmaceutical companies. Any referenced product names or trademarks are the property of their respective owners and are mentioned for informational purposes only. US Quick Health LLC is not affiliated with, endorsed by, or sponsored by any trademark owners.
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All trademarks and registered brand names are the property of their respective owners. US Quick Health is a telehealth coordination platform and does not operate as a pharmacy. No medications or medical products are directly sold or shipped by US Quick Health. All information provided on usquickhealth.com is for informational purposes only and does not constitute medical advice or a binding offer. Use of this platform is at your own risk and initiative. You are solely responsible for complying with the applicable laws in your jurisdiction. Our services are not intended for emergency medical situations. In case of an emergency, please dial 911.
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Popular
Support
About Us
Legal
© 2025 US Quick Health, LLC. All rights reserved.
All trademarks and registered brand names are the property of their respective owners. US Quick Health is a telehealth coordination platform and does not operate as a pharmacy. No medications or medical products are directly sold or shipped by US Quick Health. All information provided on usquickhealth.com is for informational purposes only and does not constitute medical advice or a binding offer. Use of this platform is at your own risk and initiative. You are solely responsible for complying with the applicable laws in your jurisdiction. Our services are not intended for emergency medical situations. In case of an emergency, please dial 911.
Medical consultations are conducted by independent, licensed healthcare professionals. US Quick Health does not employ medical providers and does not interfere with clinical decisions. US Quick Health complies with HIPAA and ensures that all personal health information (PHI) is handled securely and in accordance with U.S. privacy laws. All prescriptions are fulfilled by licensed U.S. pharmacies. Company Name: US Quick Health, LLC | Business Address: STE 27345 W Sand Lake Rd, Suite 210, Office 2630, Orlando, FL 32819 | Support Email: [email protected] | General Inquiries: [email protected] | Phone: +1 (332) 223-0323 | Business Hours: 24/7
