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Theovent SR 300300mg

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Drug International Ltd.
Generic: Theophylline
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descriptionSafety Advices
It is unsafe to consume alcohol with Theovent SR 300.
Theovent SR 300 may be unsafe to use during pregnancy. Although there are limited studies in humans, animal studies have shown harmful effects on the de... View More
Theovent SR 300 is safe to use during breastfeeding. Human studies suggest that the drug does not pass into the breastmilk in a significant amount and i... View More
Theovent SR 300 does not usually affect your ability to drive.
Theovent SR 300 is safe to use in patients with kidney disease. No dose adjustment of Theovent SR 300 is recommended.
Theovent SR 300 should be used with caution in patients with liver disease. Dose adjustment of Theovent SR 300 may be needed. Please consult your doctor... View More
descriptionMedical Overview


Theovent SR 300 is used to treat and prevent symptoms of asthma and chronic obstructive pulmonary disorder (a lung disorder in which flow of air to the ... View More

Uses of Theovent SR 300

  • Chronic obstructive pulmonary disease (COPD)
  • Asthma

Side effects of Theovent SR 300

  • Upset stomach
  • Vomiting
  • Headache
  • Nausea
  • Restlessness

How to use Theovent SR 300

Take this medicine in the dose and duration as advised by your doctor. Swallow it as a whole. Do not chew, crush or break it. Theovent SR 300 is to be t... View More

How Theovent SR 300 works

Theovent SR 300 is a bronchodilator. It works by relaxing the muscles of the airways and widens airways. This makes breathing easier.

quick tipsQuick Tips
  • You have been prescribed OD PHYLLIN 600 MG TABLET for prevention and treatment of asthma and chronic obstructive pulmonary disease (COPD).
  • It should be taken at the same time each day, preferably in the evening after food.
  • It does not work right away and should not be used to relieve sudden breathing problems. Always keep a fast-acting (rescue) inhaler with you.
  • Your doctor may take regular blood test to monitor potassium level and the level of this medicine in your body.
  • Notify your doctor if you have ever been diagnosed with kidney, liver or heart disease, or if you have a smoking history. Your dose may need to be adjus... View More
  • Do not discontinue use without consulting your doctor, even if you feel better.
descriptionBrief Description


Asthma, Chronic obstructive pulmonary disease, Bronchospasm, Apnoea of prematurity


May be taken with or without food, at least 1 hour before or 2 hour after meal.

Adult Dose

Oral Acute Asthma Loading Dose: 5 mg/kg loading dose (patient not receiving theophylline or aminophylline). Maintenance of Asthma, COPD General Do... View More

Child Dose

Oral Acute Asthma Loading Dose: 5 mg/kg loading dose If no theophylline has been administered in the previous 24 hours 2.5 mg/kg loading dose If theo... View More


Hypersensitivity to xanthine derivatives, porphyria.

Mode of Action

Theophylline competitively blocks phosphodiesterase which increases cAMP tissue concentrations causing bronchodilatation, diuresis, CNS and cardiac stim... View More


Patient w/ peptic ulceration, hyperthyroidism, DM, glaucoma, severe hypoxemia, epilepsy, HTN, heart failure, cardiac arrhythmias or other CV disease, ac... View More

Side Effect

Nausea, vomiting, epigastric pain, abdominal cramps, anorexia, diarrhoea, haematemesis; headache, irritability, restlessness, nervousness, insomnia, diz... View More


Increased plasma concentrations w/ allopurinol, some antiarrhythmics, cimetidine, disulfiram, fluvoxamine, interferon alfa, macrolide antibiotics, quino... View More

Alternative brand for Theovent SR 300
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The information provided herein is accurate, updated and complete as per the best practices of the Company. Please note that this information should not... View More

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