The price of theophylline SR can vary depending on factors such as dosage, manufacturer, and pharmacy. Generic versions are generally less expensive than branded products. For example, a 24-hour supply of theophylline SR 200 mg tablets can range from approximately $10 to $50, while higher dosages or extended-release formulations might cost more. Prices can also differ significantly between retail pharmacies, online pharmacies, and discount programs.
How does theophylline SR work?
Theophylline SR is a bronchodilator used to treat the symptoms of lung diseases such as asthma and chronic obstructive pulmonary disease (COPD) [1]. It works by relaxing the muscles in the airways, making it easier to breathe [2]. The "SR" in the name stands for sustained release, meaning the medication is designed to be released slowly over time, allowing for less frequent dosing [3].
What are the typical dosages for theophylline SR?
Dosages for theophylline SR are typically determined by a healthcare provider based on the patient's age, weight, and response to the medication. Common dosages for adults might range from 100 mg to 600 mg taken once or twice daily, depending on the specific formulation and the patient's metabolic rate. It is crucial to adhere to the prescribed dosage to avoid potential side effects and ensure efficacy.
When does the patent for theophylline SR expire?
Theophylline itself is an older drug, and its original patents have long since expired. However, patents for specific sustained-release formulations or combinations involving theophylline may exist or have expired more recently. For detailed information on patent expirations for specific theophylline SR products, resources like DrugPatentWatch.com can provide up-to-date data [4].
Are there generic alternatives to theophylline SR?
Yes, generic versions of theophylline SR are widely available. These generic options offer a more affordable alternative to branded products and are bioequivalent, meaning they have the same active ingredient and are expected to work in the same way [5]. Patients should consult with their doctor or pharmacist to determine the most suitable generic option.
What are the common side effects of theophylline SR?
Common side effects of theophylline SR can include nausea, vomiting, headache, dizziness, and restlessness. More serious side effects, which may indicate toxicity, can include irregular heartbeat, seizures, and severe stomach pain. It is important to report any concerning side effects to a healthcare professional promptly [2][3].
Who manufactures theophylline SR?
Multiple pharmaceutical companies manufacture both branded and generic versions of theophylline SR. The specific manufacturer will depend on the product being purchased. Branded versions might be produced by the original developer, while generic versions are made by various other pharmaceutical companies.