Severe. These medicines may interact and cause very harmful effects and are usually not taken together. Contact your healthcare professional (e.g. doctor or pharmacist) for more information.
How the interaction occurs:
Monoamine oxidase inhibitors (MAOIs) may increase the effects of your antihistamine.
What might happen:
Your blood pressure may drop dangerously low.
What you should do about this interaction:
Let your healthcare professionals (e.g. doctor or pharmacist) know right away that you are taking these medicines together. Your doctor may want to change your medicine. Let your doctor know right away if you have any weakness, dizziness, fainting, or blurred vision.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.
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