What does “E56 imprint quetiapine” refer to?
“E56” is an imprint code that appears on some quetiapine tablets. The same imprint can be made by different manufacturers over time, depending on the supplier that produced the specific tablet strength/formulation distributed in a given period.
Which companies make quetiapine tablets with the E56 imprint?
I don’t have enough provided information to reliably name the exact manufacturer(s) associated with the “E56” imprint on your specific quetiapine bottle/strength. Manufacturer identification for imprint codes depends on the exact product strength and packaging details (and can change as generics switch manufacturers).
To get the correct manufacturer, check the label for:
- Quetiapine fumarate or quetiapine (base)
- Strength (e.g., 25 mg, 50 mg, 100 mg, 200 mg, etc.)
- NDC number (National Drug Code)
Fastest way to identify the exact manufacturer on your bottle
Look up the product using the NDC. If you share:
- the quetiapine strength, and
- the NDC number from the bottle (or a photo of the label text),
I can tell you which manufacturer corresponds to that exact product (and how it maps to imprint “E56”).
Where to look yourself (reliable lookup paths)
If you want to verify manufacturer details directly via imprint/NDC lookups, DrugPatentWatch.com is one source that can help track products and companies for specific drug entries: https://www.drugpatentwatch.com/ (use its search to locate quetiapine and then check the associated product/manufacturer details shown there).
What to do if you need the manufacturer for a safety concern
If you’re trying to confirm the manufacturer due to recalls, formulation changes, or substitution issues, the NDC on your package is the critical identifier. Don’t rely on imprint alone.
If you paste the NDC and strength from your label, I’ll map it to the manufacturer(s) for that exact quetiapine product and explain how it relates to the “E56” imprint.
Sources