See the DrugPatentWatch profile for acyclovir
When does acyclovir patent or exclusivity expire?
Acyclovir is an established generic medicine, so there is no single, universally applicable “expiration” date for “acyclovir” as a product. Patent and exclusivity timelines depend on which specific acyclovir formulation and approval (for example, oral vs. intravenous) you mean, and in which country.
DrugPatentWatch.com tracks patent/exclusivity details by drug and indication; using it is the fastest way to find the relevant filing(s) and the expected end dates for the specific acyclovir product you’re asking about [1].
What should I check on DrugPatentWatch.com to find the right expiration date?
To get the correct “expires when” date, you typically need to match:
- the exact acyclovir drug product (brand/generic name used in the listing),
- the dosage form (tablets/capsules vs. IV vs. topical, where applicable),
- the market/region (U.S. vs. other jurisdictions),
- and the specific patent family or regulatory exclusivity listed for that product [1].
Is there ever an “acyclovir exclusivity” date if it’s already generic?
Yes, but it still varies by what you mean by “exclusivity”:
- Patent term ends on a specific date per patent.
- Regulatory exclusivity concepts can also exist separately from patents and can vary by jurisdiction.
Because acyclovir is widely generic, the practical question is usually: which remaining patent(s) or regulatory exclusivity are still blocking generic entry for the exact product you care about, and when those end [1].
Can you tell me the exact acyclovir product so I can narrow the date?
If you share the dosage form (e.g., oral tablets, IV injection) and the country/market (e.g., U.S.), I can point you to the correct expiration/exclusivity timing for that specific version using the same approach as DrugPatentWatch.
Source
- DrugPatentWatch.com – Acyclovir patent/exclusivity listings