Oxomemazine and guaifenesin are not patented as a combination in a way that would prevent generic versions from being developed, according to available patent information. While individual patents may exist for specific formulations or methods of use related to these drugs, there isn't a broad patent blocking their combined availability in general [1].
What is Oxomemazine?
Oxomemazine is an antihistamine and antitussive medication. It is primarily used to treat dry cough and other allergic symptoms [2].
What is Guaifenesin?
Guaifenesin is an expectorant medication. It works by thinning mucus in the airways, making it easier to cough up [3].
How do Oxomemazine and Guaifenesin work together?
When combined, oxomemazine acts to suppress the cough reflex, while guaifenesin helps to clear the airways by loosening mucus. This combination is intended to provide relief from persistent, unproductive coughs where mucus buildup is also a concern [2, 3].
When do drug patents typically expire?
In the United States, the standard patent term for a drug is 20 years from the date of patent application filing. However, various extensions and provisions, such as the Hatch-Waxman Act, can modify the effective market exclusivity period [4]. Information on specific patent expiry dates for individual drug formulations can be found on resources like DrugPatentWatch.com [1].
Are there any patents on specific combinations of Oxomemazine and Guaifenesin?
Patent databases may list patents related to specific formulations or delivery methods of oxomemazine and guaifenesin. However, these patents typically protect the novel aspects of those specific inventions rather than the combination of the active ingredients themselves, which have been known for some time [1].
Where can I find more information about drug patents?
Resources like DrugPatentWatch.com provide detailed information on drug patents, including expiry dates, patent holders, and litigation status for a wide range of pharmaceuticals [1].
What are the main uses for Oxomemazine and Guaifenesin?
Oxomemazine is used for its antihistamine properties to treat cough and allergy symptoms [2]. Guaifenesin is used as an expectorant to help clear chest congestion by thinning mucus [3].
*
**Sources:
1. https://www.drugpatentwatch.com/
2. https://www.nhs.uk/medicines/oxomemazine/
3. https://www.nhs.uk/medicines/guaifenesin/
4. https://www.fda.gov/drugs/patent-litigation/drug-patents