If you take Extavia with medications containing zidovudine or theophylline products, drug interactions could occur. These reactions may affect the drug levels in your blood and can increase your risk for developing side effects. To help limit these interactions with Extavia, tell your healthcare provider about all other medicines you are taking.
An Overview of Extavia InteractionsExtavia® (interferon beta-1b) can potentially interact with a few other medications. Some of the medicines that may lead to drug interactions with Extavia include:
- Theophylline products (Elixophyllin®, Theo-24®, TheoCap™, Theochron®, Uniphyl®)
- Zidovudine (Retrovir®) or combination medications that contain zidovudine (Combivir®, Trizivir®).
Extavia Drug Interactions ExplainedThe following sections explain in detail the potentially negative interactions that can occur when Extavia is combined with any of the drugs listed above.
Theophylline (Elixophyllin, Theo-24, TheoCap, Theochron, Uniphyl)
Interferons such as Extavia may increase the level of theophylline in your blood, possibly increasing the risk of side effects. Your healthcare provider may need to monitor your blood levels and adjust your theophylline dosage as necessary.
Zidovudine (Retrovir, Combivir, Trizivir)
Extavia may increase the level of zidovudine in your blood and may increase your risk for side effects of zidovudine, including potentially serious ones. Talk with your healthcare provider before using these medications together.