E56 quetiapine 300 mg manufacturer?

I can’t be sure from just the imprint. “E56” on a 300 mg quetiapine tablet isn’t tied to a single fixed manufacturer—the imprint can vary by lot and by generic company.

What I can do to help:
- If you have the package, check the label for the NDC (National Drug Code) number and the manufacturer name.
- Use a pill identifier tool (e.g., Drugs.com Pill Identifier or the FDA’s database) by entering the imprint “E56” and “quetiapine 300 mg.”
- If you can share a photo of the pill or the NDC on the bottle, I can help narrow it down.

If this is for safety or dosing concerns, contact a pharmacist or a healthcare provider before taking the medication.