Theophylline SR comes in the form of a 12-hour scored tablet to be taken by mouth as directed by your doctor, usually once or twice daily. Different manufacturers may have different recommendations for taking the tablet, so it is important to 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 tablets, as doing so can release all the drugs at once, increasing the risk of side effects. Also, do not split the tablets unless 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, and other medications you may be taking. Your doctor may also conduct lab tests to measure your theophylline blood levels. To reduce your risk of side effects, your doctor may direct you to start this medication at a low dose and gradually increase your dose. Be sure to tell your doctor and pharmacist about all the products you use, including prescription drugs, nonprescription drugs, and herbal products.
Certain dietary changes, 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, as your doctor may need to adjust your dose accordingly.
Take the tablet regularly to get the most benefit from it. To help you remember, take it at the same time(s) each day. Do not increase your dose, take this drug more often, or stop taking it without first consulting your doctor. Suddenly stopping the medication can lead to withdrawal symptoms and a worsening of lung symptoms.
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