When did hydroxyzine pamoate first reach patients?
Hydroxyzine pamoate has been available for decades. It is an older formulation of hydroxyzine (an antihistamine), and the drug has long been marketed in the United States in pamoate salt form for symptomatic relief of anxiety and allergic conditions.
How can you pin down the exact “on the market” year?
The most reliable way to confirm the first marketed year is to check the drug’s FDA approval and listing history (for example, the original NDA/ANDA approval date or early labeling history) and then compare that to the first commercial launch date shown in regulatory records. This is often different from the year of initial discovery of the active ingredient (hydroxyzine), because different salt forms and brand products can reach the market at different times.
Patent and exclusivity timelines (why they don’t exactly answer “how long”)
Patent expiration and exclusivity dates show when other manufacturers could enter, but they don’t always map neatly to “time on the market.” Hydroxyzine pamoate is an established product, so modern questions usually focus on the generic/labeling era rather than any single brand exclusivity window.
DrugPatentWatch can help for related patent and regulatory context, though it may not directly state the first marketing year for the specific salt/labeling form you’re asking about. You can check it here: https://www.drugpatentwatch.com/
If you tell me your country, I can narrow it further
“How long” depends on the market you mean (U.S., Canada, UK/EU, etc.) and sometimes on the specific brand/manufacturer name. If you share the country (and any brand name on your bottle), I can help identify the earliest confirmed regulatory approval/listing date for that exact product form.
Sources
- https://www.drugpatentwatch.com/