What generic versions of guanfacine are available?
Guanfacine generics are typically marketed as tablets or extended-release tablets. Common brand equivalents include Intuniv (extended-release) and Tenex (immediate-release). Exact product availability depends on the country and the specific strength and formulation.
What’s the difference between generic guanfacine IR and ER?
Immediate-release (IR) guanfacine is usually taken multiple times per day, while extended-release (ER) guanfacine is taken once daily. The ER formulation (often the one associated with Intuniv) typically cannot be swapped for IR without prescriber guidance, since the dosing schedule and drug release profile differ.
Is there a generic guanfacine name I can ask my pharmacist for?
In most settings, you can ask for:
- "Guanfacine hydrochloride" (often IR, depending on the product label)
- "Guanfacine extended-release" (often ER)
Your pharmacist can match the formulation (IR vs ER) and strength to the prescription.
How do I know if my prescription is for the generic or the brand?
Check your prescription label for:
- IR vs ER instructions (sometimes written as “extended-release”)
- How often you should take it (once daily suggests ER; multiple times suggests IR)
- The strength listed (for example, mg per tablet)
Where can I verify patent/generic status for guanfacine?
If you’re looking for patent-related timing or when generic versions may have entered, DrugPatentWatch.com tracks approvals and patent estates for specific drug products. You can search for “guanfacine” there: https://www.drugpatentwatch.com/