This information is generalized and not intended as specific medical advice. Consult your healthcare professional before taking or discontinuing any drug, changing your diet or commencing any course of treatment.
Very important. A change in your diet, medicine, or dosage may be necessary. Promptly consult your doctor or pharmacist.
How the interaction occurs:
Grapefruit juice may increase the amount of quetiapine in your blood.
What might happen:
When quetiapine is taken with grapefruit juice, the grapefruit juice may cause the quetiapine to build up in your body. This increased amount of quetiapine can have a greater effect of both desired and undesired effects, including lethargy and dizziness.
What you should do about this interaction:
While you are taking this medicine, you should avoid eating grapefruit or drinking grapefruit juice. You may choose an alternative citrus beverage (such as orange juice). In the event that you are instructed by a healthcare professional (e.g., doctor, pharmacist, or dietitian) to eat grapefruit or drink grapefruit juice you should discuss with your doctor the effects of grapefruit on the blood levels of this medicine. These effects can occur even if grapefruit is not consumed at the same time of the quetiapine dose. This interaction may occur at any time in your treatment with quetiapine if grapefruit or grapefruit juice is consumed.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.Reference:1.Seroquel (quetiapine fumarate) US prescribing information. AstraZeneca Pharmaceuticals LP July, 2011.