Prescription Required
Formulation: 12H ER Scored Tablet
Prescription Required
Formulation: 12H ER Scored Tablet
(Generic Alternative)
Select the prescribed dosage
Select the quantity to see the price.
* This price includes a dispensing fee, medical review fee, and packing fee.
Shipped and delivered directly to your doorstep
Theo-Dur (active ingredient: theophylline) is a prescription medication used to help manage certain chronic lung conditions that affect breathing. It belongs to a class of medications known as methylxanthines, which help relax and open the airways in the lungs.
By improving airflow, Theo-Dur can help reduce breathing difficulties and support better lung function in people with chronic respiratory conditions.
Asthma
Theo-Dur is used to help prevent and control symptoms associated with asthma, a chronic condition that causes inflammation and narrowing of the airways.
Asthma symptoms may include:
Theo-Dur helps keep the airways open, making it easier to breathe and reducing the frequency and severity of asthma symptoms.
It is typically used as a maintenance medication and is not intended for the immediate relief of sudden asthma attacks.
Chronic Obstructive Pulmonary Disease (COPD)
Theo-Dur is also used in the management of chronic obstructive pulmonary disease (COPD), including:
COPD is a progressive lung disease that makes breathing difficult due to airway inflammation and damage to lung tissue.
Theo-Dur may help:
Theo-Dur contains theophylline, which works by relaxing the smooth muscles surrounding the airways.
Airway Relaxation
When the muscles around the airways tighten, breathing becomes more difficult. Theophylline helps relax these muscles, causing the airways to widen.
This process, known as bronchodilation, helps:
Improved Lung Function
By opening the airways, Theo-Dur can help improve overall lung function and reduce symptoms associated with chronic respiratory conditions.
Patients may experience:
When used as prescribed, Theo-Dur may help:
Because Theo-Dur requires careful dosing and monitoring, it should always be taken exactly as prescribed by a healthcare provider.
Theo-Dur is available as an extended-release tablet that is typically taken once or twice daily, as directed by your healthcare provider. Because different manufacturers may provide slightly different instructions, ask your doctor or pharmacist whether your specific brand should be taken with food, without food, or at particular times of the day.
For the medication to work properly, take it exactly as prescribed and try to take it at the same time each day.
Swallow the tablet whole with water unless your healthcare provider specifically instructs you otherwise.
Do not:
Crushing or chewing a sustained-release tablet can cause the medication to be released too quickly, increasing the risk of side effects and potentially affecting how well the medication works.
If your tablet is scored and your healthcare provider recommends splitting it, swallow the pieces whole without crushing or chewing them.
The appropriate dose of Theo-Dur varies from person to person and depends on several factors, including:
Because theophylline has a narrow therapeutic range, your healthcare provider may order regular blood tests to monitor the amount of medication in your bloodstream and ensure that it remains within a safe and effective range.
To reduce the risk of side effects, treatment is often started at a lower dose and gradually increased as needed.
Theophylline can interact with many medications and supplements. Before starting treatment, tell your healthcare provider about all products you use, including:
Certain dietary changes may also affect how theophylline works in your body.
Examples include:
If you make significant changes to your eating habits, inform your healthcare provider, as your dosage may need to be adjusted.
Consistent dosing helps maintain stable medication levels and provides the best symptom control.
Do not stop taking Theo-Dur without first consulting your healthcare provider.
Suddenly discontinuing the medication may:
If treatment needs to be stopped, your healthcare provider will advise you on the safest way to do so.
Because theophylline levels can be affected by medications, diet, age, illness, and smoking status, regular monitoring may be necessary throughout treatment.
Your healthcare provider may periodically check:
Regular follow-up appointments help ensure that Theo-Dur remains both safe and effective for long-term management of asthma or COPD.
Theo Dur (Theophylline SR) is available in the following forms and strengths:
Before taking Theo-Dur, discuss your complete medical history, lifestyle habits, and current medications with your healthcare provider. Because theophylline has a narrow therapeutic range, careful monitoring is important to help reduce the risk of serious side effects.
Do not take Theo-Dur if you are allergic to:
Seek immediate medical attention if you develop signs of an allergic reaction, such as:
It is important to take Theo-Dur exactly as prescribed.
Do not:
Because excessive theophylline levels can be dangerous, taking too much medication may increase the risk of serious side effects and toxicity.
Tell your healthcare provider if you have a history of:
These conditions may affect how your body processes theophylline or increase your risk of complications during treatment.
Many medications can interact with Theo-Dur and affect the amount of theophylline in your bloodstream.
These interactions may increase the risk of side effects or reduce the effectiveness of treatment.
Before starting Theo-Dur, tell your healthcare provider about all:
Regular blood tests may be needed if medications are added, discontinued, or changed during treatment.
Certain lifestyle factors can affect how theophylline works in your body.
Use caution if you:
Smoking can alter the way your body processes theophylline, while caffeine may increase stimulant-like side effects such as nervousness, tremors, and rapid heartbeat.
Alcohol may increase the risk of side effects and may affect how well the medication works. Avoid excessive alcohol consumption and discuss your alcohol use with your healthcare provider.
Certain foods and beverages may influence the effects of theophylline or contribute to side effects.
Examples include:
If you make significant dietary changes while taking Theo-Dur, inform your healthcare provider, as your dosage may need adjustment.
Theo-Dur can affect heart rate and blood pressure.
In some cases, the medication may increase the risk of:
Patients with existing heart disease or a history of heart problems should use Theo-Dur with caution and may require closer monitoring.
Seek medical attention if you experience:
Some patients may experience side effects such as:
Contact your healthcare provider if side effects become severe, persistent, or worsen over time.
If you are pregnant, planning to become pregnant, or breastfeeding, speak with your healthcare provider before taking Theo-Dur.
Your healthcare provider will carefully weigh:
Do not start or stop theophylline therapy during pregnancy or breastfeeding without medical advice.
Contact your healthcare provider immediately if you experience:
Regular follow-up appointments and blood level monitoring can help ensure that Theo-Dur remains a safe and effective treatment for asthma or COPD.
The dosing schedule for Theo-Dur varies depending on your medical condition, age, response to treatment, and blood theophylline levels. Some patients may take it once daily, while others may take it twice daily. Always follow the dosing instructions provided by your healthcare provider or pharmacist, and do not change your dose without medical advice.
No. Theo-Dur is not considered addictive and does not cause dependence in the way some medications can. However, it should still be taken exactly as prescribed to ensure safe and effective treatment of asthma or COPD symptoms.
If you miss a dose of Theo-Dur, take it as soon as you remember. However, if it is almost time for your next scheduled dose, skip the missed dose and continue with your regular dosing schedule. Do not take two doses at the same time or double your dose to make up for a missed one, as this may increase the risk of serious side effects. If you are unsure what to do after missing a dose, contact your healthcare provider or pharmacist for guidance.
No. Do not stop taking Theo-Dur without first consulting your healthcare provider, even if your breathing symptoms improve. Theo-Dur is often used as a long-term maintenance medication to help control asthma or COPD symptoms. Stopping the medication suddenly may lead to worsening breathing problems, reduced lung function, or a return of symptoms. If treatment needs to be discontinued, your healthcare provider will advise you on the safest way to do so.
| Generic name: | Theophylline SR |
|---|---|
| Formulation: | 12H ER Scored Tablet |
| Strength(s): | 100mg, 200mg, 300mg |
| Quantities Available: | 100 |
Our online Canadian Pharmacy is known for high standards of quality, safety, and efficiency when it comes to medications.
Our pharmacy offers lower prices on prescription drugs compared to traditional pharmacies.
When ordering Theo Dur (theophylline sr) from a Canadian pharmacy, you can typically purchase up to a 90-day supply at one time, which is common for prescription medications to ensure adequate management of chronic conditions without frequent refills.
Here’s what you need to know:
Dosage and Quantity: Theo Dur is commonly prescribed in various dosages, such as 100 mg, 200 mg, and 300 mg tablets. The exact quantity will depend on your prescribed daily dose. For example:
If you are prescribed 200 mg twice daily, for a 90-day supply, you would order 180 tablets of the 200 mg strength (90 days x 2 tablets per day).
Yes, we sell theophylline sr. You can enjoy low prices when you order from us. To dispense the medication, you will need a valid prescription from your healthcare provider. We require this to ensure your safety and proper medication management. You can mail, fax, or upload your prescription through your online account.
Yes, we ship Theo Dur (theophylline SR) to both the United States and Puerto Rico.
Watch how Online Pharmacies Canada is helping customers save money on their medications.
Online Pharmacies Canada has provided information from third parties intended to increase awareness and does not contain all the information about Theo Dur (Theophylline SR). Talk to your doctor or other qualified medical practitioners for medical attention or advice, or if you have any concerns about Theo Dur (Theophylline SR).
REVIEWS