Quetiapine, sold under the trade name Seroquel among others, is an atypical antipsychotic .. Serum or plasma quetiapine concentrations are usually in the 1–10 mg/L range in overdose .. Jump up to: PRODUCT INFORMATION STADA(TM) Quetiapine (quetiapine fumarate Tablets 25 mg, 100 mg, 200 mg, 300 mg)....