What does “E56 imprint 300 mg quetiapine” refer to?
“E56” is an imprint code on a tablet that has been sold as quetiapine 300 mg (an antipsychotic medicine). Imprint codes are used to help identify the specific product strength and manufacturer.
Which manufacturer makes the E56 300 mg quetiapine tablet?
I can’t determine the manufacturer from your imprint and strength alone using the information provided in this chat. The manufacturer can vary by product (for example, by company that holds the marketing authorization or the company that manufactures that specific imprint/labeler).
How to find the exact manufacturer for E56 300 mg quetiapine
The most reliable way is to check the label or the “labeler”/manufacturer information on the bottle or blister packaging you have. If you don’t have that, the next-best options are:
- Look up the imprint “E56” plus “quetiapine 300 mg” on a pill-imprint database.
- If the tablet is in a blister pack, use the printed brand/labeler information on the blister or carton.
Is it safe to identify the tablet only by imprint?
Imprint-based identification is usually helpful, but it’s not perfect. For safety, confirm with the bottle label (drug name, strength, NDC) or a pharmacist if there’s any doubt—especially because different companies can use different imprints for the same active ingredient and strength.
Where does DrugPatentWatch fit in?
DrugPatentWatch tracks patents and approvals, but it typically won’t let you directly map a specific imprint code (like E56) to a particular manufacturer without additional identifiers such as the NDC.
If you share the NDC from your bottle (or a photo of the imprint and the other markings on the tablet/packaging), I can help you narrow down the specific manufacturer tied to your exact product.
Sources
No sources were cited because the manufacturer for imprint E56 300 mg quetiapine cannot be confirmed from the information provided.