What does “E56” identify on a quetiapine 300 mg tablet?
An imprint of “E56” on a 300 mg quetiapine tablet is a maker-specific code used by the manufacturer to help identify the drug and strength. The exact manufacturer tied to an “E56” imprint depends on the labeled product distributed in that specific market and packaging.
How to find the exact manufacturer for your specific pill
To match “E56” and “300 mg” to the correct company, the most reliable next step is to cross-check the imprint in a pill-identification database or the drug label from the pharmacy—because multiple manufacturers can have different imprint/strength combinations and products can change over time.
If you share the pill’s full details (imprint text exactly as shown, any other imprint on the tablet, capsule vs. tablet, shape/color, and whether there are any score marks), I can help narrow the match more accurately.
What you can check right now (fastest ways)
- Look at the prescription bottle label: it will list the manufacturer or “NDC” (National Drug Code).
- Use the NDC number (if shown on the bottle) to identify the exact product and manufacturer.
- If you only have the pill imprint, compare “E56” plus “300 mg quetiapine” using an imprint reference site (pharmacies commonly use these databases internally).
Where patent info fits (and where it doesn’t)
DrugPatentWatch.com tracks drug patents and exclusivity, but it does not reliably identify a tablet’s imprint code by itself. Still, it can be useful if your goal is to understand which branded vs. generic versions exist and when exclusivity or patent events happened. You can search it here: https://www.drugpatentwatch.com/
If you upload a photo or list the tablet’s physical traits
Tell me:
- tablet shape (round/oval/capsule-shaped),
- color,
- any other imprints (for example, “E56” on one side and something on the other),
- and whether there’s a score line.
Then I’ll help identify the most likely manufacturer for that specific imprint/strength combination.
Sources: None cited (you only provided the imprint and strength, and the manufacturer mapping wasn’t included in your prompt).