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small oval white pill on one side theo-dhr 300 half mard on other side ## The pill with imprints theo-dur 300 is Theo-Dur 300 mg Extended release. Theo-Dur, an oral bronchodilator medication, is given to treat symptoms of asthma, chronic bronchitis, and emphysema. The active ingredient of Theo-Dur, theophylline, is a chemical cousin of caffeine. It opens the airways by relaxing the smooth muscle that circles the tubes and blood vessels in the lungs.
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white oblong pill scored in the middle on one side and the other side has pliva459 on it ## This info is from Wikipedia: Theophylline is a methylxanthine drug and is used in therapy for respiratory diseases, under a variety of brand names. It bears structural and pharmacological similarity to caffeine. It is naturally found in black tea and green tea. The main actions of theophylline are: - relaxation of bronchial smooth muscle - positive inotropic (increases heart muscle contractility and efficiency) - positive chronotropic (increases heart rate) - lowers blood pressure - increases renal blood flow - some anti-inflammatory effect The use of theophylline is complicated by the fact that it interacts with various drugs, chiefly cimetidine and phenytoin, and that it has a narrow therapeuti...
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