Shipping Update

We are now seeing improvements in our shipping times. However, things are not yet back to normal and there are still some delays occurring. We will provide updates as the situation changes.

Our normal shipping time averages 1 - 2 weeks. Due to the pandemic, shipments may sometimes take an additional 2 – 4 weeks to arrive, depending on the source country of your order. Shipments from the United Kingdom and Canada are generally quicker than from other countries.

Please note that these times are averages and individual shipping times will vary. We highly recommend that you place your order at least 2 – 4 weeks or more ahead of your normal reorder time to avoid running out of your medication.

We offer a shipping guarantee when you place an order with us. If your order does not arrive within 6 weeks from the date it was shipped, we will re-ship your order to you at no additional cost.

Call Center

Our call center hours of operation are 6:00 am – 9:00 pm Central Time on Monday to Friday, and 7:00 am – 7:00 pm Central Time on Saturday and Sunday.

If you are experiencing increased hold times or are calling outside of these hours, please leave us a message or send us an email and we will get back to you as soon as we can. Due to increased demand on telephone networks worldwide, you may experience some intermittent connection problems. If this happens our agents will call you back.

Our Commitment

If you have any questions about any changes in our service please do not hesitate to contact us. Our staff are working tirelessly to ensure the timely fulfillment and delivery of all orders. The health and safety of our customers and staff is our highest priority and we remain committed to providing service at the highest level.

We appreciate your business and thank you for your continued support.

Management and Staff
North Drugstore

Buy Theolair SR from Canadian & International Pharmacies

Low Price Guarantee

Delivery Guarantee

30 Day Returns

Theolair SR (Theophylline ER)

and/or alternatives
Brand Name Options

Low Price Guarantee

Delivery Guarantee

30 Day Returns

Shipping is $10.00 per order. All prices are in USD. Average shipping time is 2 weeks.
Full information about Theolair SR

General Information on Theolair SR

The generic name of Theolair SR is theophylline. This drug falls under the category of bronchodilators. Theophylline is an alkaloid found in caffeine in tea leaves and has the same chemical and pharmacologic properties as caffeine. Theolair SR is a widely used drug for treating symptoms of emphysema, asthma and bronchitis. It is also helpful in treating other respiratory diseases which result in narrowing of the airways. The drug works by relaxing the muscles in the chest and lungs, thereby resulting in increased amounts of air flow through the bronchi. Patients should buy Theolair SR online only if their doctors have prescribed it for their conditions.

Side effects of Theolair SR

Patients should seek urgent medical attention if they develop any signs of allergic reactions while on Theolair SR. These include rash, hives, trouble breathing, and swelling of the face or mouth. The drug should be discontinued immediately and patients should consult the doctor right away if they suffer from more serious side effects like seizures, severe nausea and vomiting, tachycardia, arrhythmias, insomnia, bloody emesis, high and persistent fever, and shakiness. There are also some minor side effects associated with Theolair SR including mild nausea and vomiting, weight loss, dizziness, headache, and lightheadedness.


Theolair SR has been reported to hamper alertness in some cases. In such a scenario, patients should be careful before driving or operating heavy machinery that call for alertness. Caffeine use must also be minimized while you are on Theolair SR, as caffeine tends to increase the side effects of this medication. The drug should be taken with a full glass of water and must never be crushed, chewed, or broken, as doing this decreases the efficacy of this medication significantly. However, there may be times when you doctor tells you to take it in a broken form depending on the symptoms. Theolair SR should be stored at room temperature and away from heat, direct light, and moisture. An overdose of the medication can result in serious medical complications including seizures, which are mostly fatal and can cause permanent brain damage or even death. Patients should also never take an overdose or double dose just to make up for a missed dose.

Theolair SR Dosage

The dosage of Theolair SR depends on the condition and severity of the symptoms. This medication usually comes in Theolair SR 200 mg and Theolair SR 300 mg strengths and is white in color, though other doses are also available. The usual dose is Theolair SR 300 mg twice or thrice a day, and the dose can be reduced to 200 mg when the symptoms start to subside.


Before you buy Theolair SR, inform your doctor if you are using drugs such as Tegretol, Tagamet, erythromycin, propranolol, or rifampin. These drugs have been found to interact with Theolair SR when used concurrently. You should also inform your doctor if you are on any herbal products, vitamins or minerals. Patients should consult their doctor before they buy Theolair SR if they are on other medications at present.

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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.