Answer
Quetiapine fumarate is the salt used in these medicines; product information expresses the active amount as quetiapine.
Sources for this answer
- Biquelle XL 200mg prolonged-release tablets — Current selected SmPCemc · Summary of Product Characteristics
- Quetiapine 300 mg Film-coated Tablets — Current selected SmPCemc · Summary of Product Characteristics
- Quetiapine 200 mg — Current selected SmPC