Moderate. These medicines may cause some risk when taken together. Contact your healthcare professional (e.g. doctor or pharmacist) for more information.
How the interaction occurs:
Fluoxetine or fluvoxamine may slow down how quickly your liver processes haloperidol.
What might happen:
The amount of haloperidol in your blood may increase and cause side effects.
What you should do about this interaction:
Let your healthcare professionals (e.g. doctor or pharmacist) know that you are taking these medicines together. Let your doctor know if you experience fever, stiff muscles, confusion, changes in heart rate/blood pressure, sweating, muscle pain or weakness, uncontrollable movements of the face/tongue/other body parts, light-headedness or faintness when rising from a sitting position.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.Haldol (haloperidol) US prescribing information. Ortho-McNeil-Janssen Pharmaceuticals, Inc. August, 2011.
2.Prozac (fluoxetine hydrochloride) US prescribing information. Eli Lilly and Company January, 2013.
3.Luvox CR (fluvoxamine) US prescribing information. Jazz Pharmaceuticals November, 2012.