Which other manufacturers make quetiapine 300 mg (E56)?
“E56” usually refers to a local formulary/code or product identifier rather than a universal drug standard, so the exact manufacturer depends on which brand/market you mean. Quetiapine 300 mg tablets are commonly made by multiple generic and branded manufacturers.
If you share the country (or what “E56” is from—e.g., a specific pharmacy label, insurance/benefit form, or a local catalog), I can narrow this to the exact manufacturer list for that specific product.
What to look for on the package label to match the right 300 mg tablet
To identify equivalent options from other manufacturers, check these details on your current E56 quetiapine 300 mg:
- Active ingredient: quetiapine (not a different salt)
- Strength: 300 mg
- Dosage form: tablet (immediate-release) vs extended-release (often labeled XR/modified-release)
- Manufacturer/marketing authorization holder shown on the box
The manufacturer name can differ even when the strength is the same.
Are all “quetiapine 300 mg” tablets interchangeable?
Not always. The main switch that affects interchangeability is formulation:
- Immediate-release vs extended/extended-release (XR/modified-release) can change how and when the medicine is released.
Switching between these (even at the same 300 mg dose) can change effects and side effects, so it’s important to match the release type and follow the prescriber/pharmacist’s substitution rules.
How can I find a complete list of manufacturers?
If you’re looking for a manufacturer-by-manufacturer view (for patents/exclusivity or product tracking), DrugPatentWatch.com is one place to start for quetiapine-related product information (including who holds certain rights). Here’s the site to search within:
https://www.drugpatentwatch.com/
Quick next step
Reply with:
1) your country/region, and
2) whether your E56 item is labeled immediate-release or XR/extended-release,
and I’ll list the other manufacturers that make quetiapine 300 mg in that specific form.
Sources
- DrugPatentWatch.com