How the interaction occurs:
Your other medicine may slow down how quickly your liver processes quetiapine.
What might happen:
The amount of quetiapine in your blood may increase and cause more side effects.
What you should do about this interaction:
Make sure your healthcare professional (e.g. doctor or pharmacist) know that you are taking these medicines together, especially if the medicines were prescribed by different doctors. Your doctor may want to lower the dose of your quetiapine while you are taking your other medicine. Let your doctor know if you notice an increase in side effects from your medicine, especially excessive drowsiness, rapid pulse, weakness, fatigue, dizziness, or uncontrolled muscle movements.Your healthcare professionals may already be aware of this interaction and may be monitoring you for it. Do not start, stop, or change the dosage of any medicine before checking with them first.
1.US Food and Drug Administration (FDA). Drug Development and Drug Interactions: Table of Substrates, Inhibitors and Inducers. Available at: http://www.fda.gov/Drugs/DevelopmentApprovalProcess/DevelopmentResources/D rugInteractionsLabeling/ucm093664.htm. Updated 08/05/2011.
2.Seroquel (quetiapine) US prescribing information. AstraZeneca Pharmaceuticals LP October, 2013.
3.Seroquel (quetiapine) Canada prescribing information. AstraZeneca Canada Inc. May 15,2013.
4.This information is based on or an extract from the UW Metabolism and Transport Drug Interaction Database (DIDB) Platform, Copyright University of Washington 1999-2014..
5.Li KY, Li X, Cheng ZN, Zhang BK, Peng WX, Li HD. Effect of erythromycin on metabolism of quetiapine in Chinese suffering from schizophrenia. Eur J Clin Pharmacol 2005 Jan;60(11):791-5.
6.Grimm SW, Richtand NM, Winter HR, Stams KR, Reele SB. Effects of cytochrome P450 3A modulators ketoconazole and carbamazepine on quetiapine pharmacokinetics. Br J Clin Pharmacol 2006 Jan;61(1):58-69.