What does a “Quetiapine Pfizer E56” imprint mean?
“Quetiapine Pfizer E56” refers to a tablet of quetiapine made for Pfizer, where “E56” is an imprint code used to identify the specific product/batch strength and manufacturer details on the tablet.
However, the exact manufacturer tied to the “E56” imprint can vary by strength (e.g., immediate-release vs extended-release) and by dispensing country and packaging/labeling lot. In other words, the imprint code alone isn’t always enough to confirm one single manufacturer across all quetiapine Pfizer products.
How to identify the manufacturer for your exact pill (fastest way)
To pin down the manufacturer for the specific tablet you have, check these details on the bottle and the tablet itself:
- Strength (mg) printed on the tablet (for example, 25 mg, 100 mg, 200 mg, etc.)
- Dosage form (IR vs XR/ER, often shown by wording like “XR” or a specific imprint pattern)
- Country/market (labeling differs by region)
- The full imprint (both sides if present), because many products share “E” imprint series but differ by the rest of the code
If you can share the tablet strength, whether it’s immediate-release or extended-release, and the full imprint (both sides), I can help narrow down which manufacturer that “E56” corresponds to.
Where to verify the imprint-to-manufacturer match
The most reliable way to confirm the manufacturer behind an imprint like “E56” is a pill imprint database that indexes by imprint text, drug name, dosage form, and strength. If you have access to the medication label (NDC number), that also confirms the specific marketed product and its listed manufacturer.
If you tell me your pill’s strength and whether it’s XR/ER, I can guide you on the exact fields to look for to identify the correct manufacturer.
Is “E56” a patent/imprint-related code (DrugPatentWatch)?
DrugPatentWatch.com tracks patents and exclusivity for drugs, not tablet imprint manufacturer codes. It’s useful for patent status and approvals, but it typically will not tell you which company made a specific “Quetiapine Pfizer E56” tablet. (So imprint identification usually comes from pill-identifier/NDC labeling sources rather than patent listings.)
Quick questions to get you the exact manufacturer
Reply with:
1) Strength (mg) on the tablet
2) Immediate-release or XR/ER (if shown)
3) Full imprint on BOTH sides (e.g., “E56” and any other letters/numbers)
4) Your country (or where you got the prescription)
Then I can help identify the most likely manufacturer tied to that exact imprint configuration.
Sources
(No sources were used yet because your prompt doesn’t include enough details to verify an imprint-manufacturer match from a specific reference. If you share the strength/IR-XR and full imprint, I can cite the correct identification source.)