Theo-Dur

and/or alternativesChemical Ingredient: Theophylline ER
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  • 100mg

  • 200mg

  • 300mg

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What is a generic medication?

Generic medications are significantly discounted copies of brand name medication that have the same active ingredients, intended use, dosage, side effects, effects, and route of administration as the original brand name medication. In other words, generic medications have the same pharmacological effects as their brand-name counterparts. Over half of all prescribed medications are for generic medications.

100mg Extended Release Tablets

No brand name is available for Theo-Dur 100mg.

Theophylline ER 100mg Extended Release Tablets

Generic Alternative to Theo-Dur 100mg

No brand name is available for Theo-Dur 100mg.

Theophylline ER 100mg Extended Release Tablets

Theophylline ER 100mg Extended Release Tablets

Generic Alternative to Theo-Dur 100mg

  • Marketed as Apo-Theo LA in Canada
  • Manufactured by Apotex Inc.
  • Product of Canada • Shipped from Canada
  • Prescription Required

Estimated shipping time: 2-3 weeks

Please allow 2 - 3 weeks for shipments to the United States and 4 - 6 weeks for other destinations. Most shipments will arrive faster than these times.

We offer free shipping for orders over $100 to any destination within the United States including Alaska and Hawaii, and charge $7 for orders under $100. For destinations outside of the United States, our standard shipping charge is $19.95 USD.

Read more

Please Note: Tablet cannot be split, must be swallowed whole

200mg Extended Release Tablets

No brand name is available for Theo-Dur 200mg.

Theophylline ER 200mg Extended Release Tablets

Generic Alternative to Theo-Dur 200mg

No brand name is available for Theo-Dur 200mg.

Theophylline ER 200mg Extended Release Tablets

Theophylline ER 200mg Extended Release Tablets

Generic Alternative to Theo-Dur 200mg

  • Marketed as Apo-Theo LA in Canada
  • Manufactured by Apotex Inc.
  • Product of Canada • Shipped from Canada
  • Prescription Required

Estimated shipping time: 2-3 weeks

Please allow 2 - 3 weeks for shipments to the United States and 4 - 6 weeks for other destinations. Most shipments will arrive faster than these times.

We offer free shipping for orders over $100 to any destination within the United States including Alaska and Hawaii, and charge $7 for orders under $100. For destinations outside of the United States, our standard shipping charge is $19.95 USD.

Read more

Please Note: Tablet cannot be split, must be swallowed whole

300mg Extended Release Tablets

No brand name is available for Theo-Dur 300mg.

Theophylline ER 300mg Extended Release Tablets

Generic Alternative to Theo-Dur 300mg

No brand name is available for Theo-Dur 300mg.

Theophylline ER 300mg Extended Release Tablets

Theophylline ER 300mg Extended Release Tablets

Generic Alternative to Theo-Dur 300mg

  • Marketed as Apo-Theo LA in Canada
  • Manufactured by Apotex Inc.
  • Product of Canada • Shipped from Canada
  • Prescription Required

Estimated shipping time: 2-3 weeks

Please allow 2 - 3 weeks for shipments to the United States and 4 - 6 weeks for other destinations. Most shipments will arrive faster than these times.

We offer free shipping for orders over $100 to any destination within the United States including Alaska and Hawaii, and charge $7 for orders under $100. For destinations outside of the United States, our standard shipping charge is $19.95 USD.

Theo-Dur Drug Information

Are you paying too much for Theo-Dur? Save up to 80% when purchasing your prescription drugs from Universal Drugstore. Our prescription service aspires to conveniently provide you with affordable medications at the lowest prices in Canada and internationally.

We’re working with a number of Canadian and international pharmacy partners, all licensed by their qualified governmental regulatory bodies. By collaborating with our partners, we are able to offer a wide range of brand and generic medications at very competitive prices. You can obtain discount prescription drugs through our online pharmacy. Our prices are already up to 80% lower than your local pharmacy. We are committed to providing you with the best service and prices. This is why we’ll match the price of any of our online pharmacy competitors who require a valid prescription.

Order Theo-Dur at a discount price today!

Why Buy Theo-Dur from Universal Drugstore?

We are the global leader in online prescription drug savings with almost 20 years of experience supplying prescription and over the counter drugs to our international customers. More than 300,000 international patients have used our service to receive their prescription and over-the-counter medications.

In the past two decades together with our international pharmacy partners we have shipped over 2 million prescription medication orders to our satisfied customers.

Your safety is our top priority. You can feel completely secure purchasing through us. We use SSL encryption to secure all of your personal information that is transferred through our website while using our service.

How Long Does It Take to Receive My Theo-Dur Order?

You can easily place an order on our website in under 5 minutes. First you need to set up an account with us, create a payment method, and send us your prescriptions. Alternatively, you can order by downloading our order form or by placing an order over the phone. Delivery can take approximately 2 to 3 weeks to North America, and 4 to 6 weeks to other countries.

Theophylline ER Drug Information

  • Theo-Dur Overview

    Theophylline is used to treat lung diseases such as asthma and COPD (bronchitis, emphysema). It must be used regularly to prevent wheezing and shortness of breath. Theo-Dur belongs to a class of drugs known as xanthines. It works in the airways by relaxing muscles, opening breathing passages, and decreasing the lungs' response to irritants. Controlling symptoms of breathing problems can decrease time lost from work or school. Theo-Dur must be used regularly to be effective. It does not work right away and should not be used to relieve sudden breathing problems. If sudden shortness of breath occurs, use your quick-relief inhaler as prescribed.

  • How to Use Theo-Dur

    Take Theo-Dur by mouth as directed by your doctor, usually once or twice daily. Since different manufacturers have different ways to take Theo-Dur, ask your doctor or pharmacist about the best time(s) to take your brand of theophylline and if you should take the drug with or without food. Do not crush or chew the capsules or tablets. Doing so can release all of the drug at once, increasing the risk of side effects. Also, do not split the tablets unless they have a score line and your doctor or pharmacist tells you to do so. Swallow the whole or split tablet without crushing or chewing. The Dosage of Theo-Dur is based on your medical condition, response to treatment, age, weight, lab tests (theophylline blood levels), and other medications you may be taking. Be sure to tell your doctor and pharmacist about all the products you use (including prescription drugs, nonprescription drugs, and herbal products). To reduce your risk of side effects, your doctor may direct you to start Theo-Dur at a low dose and gradually increase your dose. Follow your doctor's instructions carefully. Certain diets (such as high protein/low carbohydrate or high carbohydrate/low protein) may change the effect of theophylline. Tell your doctor if you have any major changes in your diet. Your doctor may need to adjust your dose. Take Theo-Dur regularly to get the most benefit from it. To help you remember, take it at the same time(s) each day. Keep taking Theo-Dur even if you feel well. Do not increase your dose, take Theo-Dur more often, or stop taking it without first consulting your doctor. Get medical help right away if your asthma symptoms worsen or if you are using your quick-relief inhaler more than usual or more often than prescribed.

  • Theo-Dur Precautions

    Before using theophylline, tell your doctor or pharmacist if you are allergic to it; or to other xanthine drugs (such as aminophylline, oxtriphylline, caffeine); or if you have any other allergies. Theo-Dur may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details. Before using Theo-Dur, tell your doctor or pharmacist your medical history,stomach/intestinal ulcer, seizures, thyroid disease, heart problems (such as heart failure, irregular heartbeat), liver disease, high blood pressure. If you get sick or have a fever while taking Theo-Dur, tell your doctor right away. The dose of your medicine may need to be adjusted. Before having surgery, tell your doctor or dentist about all the products you use (including prescription drugs, nonprescription drugs, and herbal products). Older adults may be more sensitive to the side effects of Theo-Dur, especially fast/irregular heartbeat, or trouble sleeping. Careful monitoring of side effects and drug blood levels is recommended. Children may be more sensitive to the side effects of Theo-Dur. Careful monitoring of side effects and drug blood levels is recommended. During pregnancy, Theo-Dur should be used only when clearly needed. Discuss the risks and benefits with your doctor. Changes in your body during the last 3 months of pregnancy may affect the amount of Theo-Dur in your blood. Your doctor should carefully monitor the amount of drug in your blood, as well as any side effects, so that your dose may be changed if needed. Theo-Dur passes into breast milk and may have undesirable effects on a nursing infant. Consult your doctor before breast-feeding.

  • Theo-Dur Misdose

    If you miss a dose of Theo-Dur, skip the missed dose. Take your next dose at the regular time. Do not double the dose to catch up.

  • Theo-Dur Interactions

    Drug interactions may change how your medications work or increase your risk for serious side effects. This document does not contain all possible drug interactions. Keep a list of all the products you use (including prescription/nonprescription drugs and herbal products) and share it with your doctor and pharmacist. Do not start, stop, or change the dosage of any medicines without your doctor's approval.riociguat. Other medications can affect the removal of theophylline from your body, which may affect how theophylline works. Examples include cimetidine, disulfiram, fluvoxamine, interferon, mexiletine, propranolol, rifampin, drugs used to treat seizures (such as carbamazepine, phenytoin), St. John's wort, ticlopidine, among others. Cigarette/marijuana (cannabis) smoking decreases blood levels of Theo-Dur. Tell your doctor if you smoke or if you have recently stopped smoking. Caffeine and alcohol can increase the side effects of Theo-Dur. Avoid drinking large amounts of beverages containing alcohol or caffeine (such as coffee, tea, colas), eating large amounts of chocolate, or taking nonprescription products that contain caffeine. Theophylline is very similar to aminophylline and oxtriphylline. Do not take medications containing aminophylline or oxtriphylline while using theophylline. Theo-Dur may interfere with certain lab tests (such as blood sugar, cholesterol, uric acid, dipyridamole-thallium imaging tests), possibly causing false test results. Make sure lab personnel and all your doctors know you use Theo-Dur.

  • Theo-Dur Side Effects

    What are Theo-Dur side effects?

    Side effects are physical, mental or emotional symptoms which occur in addition to or outside of the desired effect of a therapeutic treatment such as an over-the-counter or prescribed drug or medication. Side effects from Theo-Dur may occur at the beginning or at the end of treatment and may also depend on the length of time an individual remains on the treatment. Side effects, also known as adverse effects, are generally more likely to occur when starting treatment. Individuals may also experience side effects from Theo-Dur as a result of an interaction with other medications.

    Side Effects of Theo-Dur

    The side effects of Theo-Dur may vary in number and intensity for many different reasons. Factors such as age, weight, gender and ethnicity may influence the side effects of Theo-Dur. Also, an individual’s state of general physical health and seriousness of the disease or illness as well as an increase or decrease in dosage may lead to side effects. Further, side effects from Theo-Dur may also occur as a result of an interaction with certain herbal supplements, foods or drinks.

    Prescription drug side effects can be serious and may cause patients to stop the treatment. However, when side effects from the use of a prescription drug, such as Theo-Dur, do occur a patient should consult their physician. A physician may prescribe an additional treatment in order to control the symptoms or an adjustment in the dosage may be made. In addition, changes to diet, exercise or other lifestyle activities may help to lessen the side effects of Theo-Dur.

    By understanding side effects and the factors which may influence the occurrence of side effects patients are empowered to take an active role in their care. Patients who have specific questions about the side effects of Theo-Dur, or any other medication, should contact their physician. General information about Theo-Dur and the side effects associated with Theo-Dur are described in the following:

    Common Theo-Dur Side Effects

    Severe

    Less Severe

    • nausea
    • nervousness

    Less Frequent Theo-Dur Side Effects

    Severe

    • gastroesophageal reflux disease

    Less Severe

    • insomnia
    • anorexia
    • headache disorder
    • vomiting
    • abdominal pain with cramps
    • irritability

    Rare or Very Rare Theo-Dur Side Effects

    Severe

    • SIADH syndrome
    • extrasystoles
    • sinus tachycardia
    • urticaria
    • seizure disorder
    • bloody vomit

    Less Severe

    • hypotension
    • dizziness
    • twitching
    • flushing
    • palpitations
    • increased urinary frequency
  • Theo-Dur Storage

    Store at room temperature away from light and moisture. Do not store in the bathroom. Keep all medications away from children and pets. Do not flush medications down the toilet or pour them into a drain unless instructed to do so. Properly discard Theo-Dur when it is expired or no longer needed. Consult your pharmacist or local waste disposal company.

IMPORTANT DISCLAIMER: All medical content is supplied by a third party company who is independent from this web site. As such, this web site can not guarantee the reliability, accuracy, and /or medical efficacy of the information provided. In all circumstances, you should seek the advice of a health professional pertaining to drug, treatment and/or medical condition advice. Note that not all products are shipped by our contracted Canadian pharmacy. This website contracts with dispensaries around the world that ship products directly to our customers. Some of the jurisdiction include but are not limited to United Kingdom, Europe, Turkey, India, Canada, Vanuatu, Mauritius, and USA. The items within your order may be shipped from any one of these jurisdiction depending on the availability and cost of the products at the time you place your order. The products are sourced from these countries as well as others. Please note that the product appearance may vary from actual product received depending on availability.